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Cisco 300-115

Implementing Cisco IP Switched Networks
Version: 10.3

Cisco 300-115 Exam
Topic 1, Layer 2 Technologies

QUESTION NO: 1
What is the maximum number of switches that can be stacked using Cisco StackWise?
A.
4
B.
5
C.
8
D.
9
E.
10
F.
13

Answer: D
Explanation:
Up to 9 Cisco Catalyst switches can be stacked together to build single logical StackWise switch
since Cisco IOS XE Release 3.3.0SE. Prior to Cisco IOS XE Release3.3.0SE, up to 4 Cisco
Catalyst switches could be stacked together.
Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-seriesswitches/qa_c67-722110.html

QUESTION NO: 2
A network engineer wants to add a new switch to an existing switch stack. Which configuration
must be added to the new switch before it can be added to the switch stack?
A.
No configuration must be added.
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Cisco 300-115 Exam
B.
stack ID
C.
IP address
D.
VLAN information
E.
VTP information

Answer: A
Explanation:
Switch Stack Offline Configuration
You can use the offline configuration feature to provision (to supply a configuration to) a new
switch before it joins the switch stack. You can configure in advance the stack member number,
the switch type, and the interfaces associated with a switch that is not currently part of the stack.
The configuration that you create on the switch stack is called the provisioned configuration . The
switch that is added to the switch stack and that receives this configuration is called the
provisioned switch.
You manually create the provisioned configuration through the switch stack-member-number
provision type global configuration command. The provisioned configuration is automatically
created when a switch is added to a switch stack and when no provisioned configuration exists.
When you configure the interfaces associated with a provisioned switch (for example, as part of a
VLAN), the switch stack accepts the configuration, and the information appears in the running
configuration. The interface associated with the provisioned switch is not active, operates as if it is
administratively shut down, and the no shutdown interface configuration command does not
return it to active service. The interface associated with the provisioned switch does not appear in
the display of the specific feature; for example, it does not appear in the show vlan user EXEC
command output.
The switch stack retains the provisioned configuration in the running configuration whether or not
the provisioned switch is part of the stack. You can save the provisioned configuration to the
startup configuration file by entering the copy running-config startup-config privileged EXEC
command. The startup configuration file ensures that the switch stack can reload and can use the
saved information whether or not the provisioned switch is part of the switch stack.
Effects of Adding a Provisioned Switch to a Switch Stack
When you add a provisioned switch to the switch stack, the stack applies either the provisioned
configuration or the default configuration. Table 5-1 lists the events that occur when the switch
stack compares the provisioned configuration with the provisioned switch.

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Cisco 300-115 Exam
Table 5-1 Results of Comparing the Provisioned Configuration with the Provisioned Switch
Scenario
Result
The stack member numbers and the switch types match.
1. If the stack member number of the provisioned switch matches the stack member number in the
provisioned configuration on the stack, and
2. If the switch type of the provisioned switch matches the switch type in the provisioned
configuration on the stack.
The switch stack applies the provisioned configuration to the provisioned switch and adds it to the
stack.
The stack member numbers match but the switch types do not match.
1. If the stack member number of the provisioned switch matches the stack member number in the
provisioned configuration on the stack, but
2. The switch type of the provisioned switch does not match the switch type in the provisioned
configuration on the stack.
The switch stack applies the default configuration to the provisioned switch and adds it to the
stack.
The provisioned configuration is changed to reflect the new information.
The stack member number is not found in the provisioned configuration.
The switch stack applies the default configuration to the provisioned switch and adds it to the
stack.
The provisioned configuration is changed to reflect the new information.
The stack member number of the provisioned switch is in conflict with an existing stack member.
The stack master assigns a new stack member number to the provisioned switch.
The stack member numbers and the switch types match:
1. If the new stack member number of the provisioned switch matches the stack member number
in the provisioned configuration on the stack, and
2. If the switch type of the provisioned switch matches the switch type in the provisioned
configuration on the stack.
The switch stack applies the provisioned configuration to the provisioned switch and adds it to the
stack.
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The stack member number of the provisioned switch is not found in the provisioned configuration. but 2. 100 www.com 5 .braindumps. The switch type of the provisioned switch does not match the switch type in the provisioned configuration on the stack. 50 D. Reference: http://www. The stack member numbers match. 0 B.Cisco 300-115 Exam The provisioned configuration is changed to reflect the new information. but the switch types do not match: 1. 75 E. The switch stack applies the default configuration to the provisioned switch and adds it to the stack. The provisioned configuration is changed to reflect the new information. 25 C. The switch stack applies the default configuration to the provisioned switch and adds it to the stack.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/122_55_se/configuration/guide/3750xscg/swstack.html QUESTION NO: 3 What percentage of bandwidth is reduced when a stack cable is broken? A.cisco. If the stack member number of the provisioned switch matches the stack member number in the provisioned configuration on the stack.

Cisco StackWise Technology Resilient Cabling Reference: http://www.com 6 .cisco.braindumps. as shown in Figure 3. A break in any one of the cables will result in the stack bandwidth being reduced to half of its full capacity.com/c/en/us/products/collateral/switches/catalyst-3750-seriesswitches/prod_white_paper09186a00801b096a. Figure 3.html QUESTION NO: 4 Refer to the exhibit. www. Subsecond timing mechanisms detect traffic problems and immediately institute failover. This mechanism restores dual path flow when the timing mechanisms detect renewed activity on the cable.Cisco 300-115 Exam Answer: C Explanation: Physical Sequential Linkage The switches are physically connected sequentially.

switch1 channel-group 1 mode on switch2 www. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode passive C.braindumps.Cisco 300-115 Exam Which set of configurations will result in all ports on both switches successfully bundling into an EtherChannel? A. switch1 channel-group 1 mode active switch2 channel-group 1 mode auto B.com 7 .

but does not start LACP packet negotiation.com 8 . on Forces the interface into an EtherChannel without PAgP or LACP. in which the interface responds to LACP packets that it receives. a usable EtherChannel exists only when an interface group in the on mode is connected to another interface group in the on mode. in which the interface starts negotiations with other interfaces by sending PAgP packets. passive Places an interface into a passive negotiating state. desirable Places an interface into an active negotiating state.Cisco 300-115 Exam channel-group 1 mode auto D. Both the auto and desirable PAgP modes allow interfaces to negotiate with partner interfaces to www. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode auto Answer: D Explanation: The different etherchannel modes are described in the table below: Mode Description active Places an interface into an active negotiating state. auto Places an interface into a passive negotiating state. This setting minimizes the transmission of PAgP packets. in which the interface starts negotiations with other interfaces by sending LACP packets. With the on mode.braindumps. in which the interface responds to PAgP packets it receives but does not start PAgP packet negotiation. This setting minimizes the transmission of LACP packets.

An interface in the auto mode cannot form an EtherChannel with another interface that is also in the auto mode because neither interface starts PAgP negotiation. Reference: http://www. B. How can the traffic that is mirrored out the GigabitEthernet0/48 port be limited to only traffic that is received or transmitted in VLAN 10 on the GigabitEthernet0/1 port? A.Cisco 300-115 Exam determine if they can form an EtherChannel based on criteria such as interface speed and. C. An interface in the on mode that is added to a port channel is forced to have the same characteristics as the already existing on mode interfaces in the channel. Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10.braindumps. Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10.cisco. www. trunking state and VLAN numbers.com 9 .html QUESTION NO: 5 Refer to the exhibit. for Layer 2 EtherChannels. •An interface in the auto mode can form an EtherChannel with another interface in the desirable mode. Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/121_13_ea1/configuration/guide/3550scg/swethchl. For example: •An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode.

If you specify a series of VLANs.Cisco 300-115 Exam Apply the monitor session filter globally to allow only traffic from VLAN 10. a VLAN cannot become a source. you must enter a space before and after the hyphen ( -). Change the monitor session source to VLAN 10 instead of the physical interface.html#wp38 75419997 QUESTION NO: 6 Refer to the exhibit. If a VLAN is a source. If VLAN filtering is configured. You select a series or range of VLANs by using the [ . all VLANs are monitored on trunk source ports. VLAN filtering refers to analyzing network traffic on a selected set of VLANs on trunk source ports. You can have a total of 66 SPAN and RSPAN sessions on a switch or switch stack. You can monitor traffic on a single VLAN or on a series or range of ports or VLANs. Reference: http://www. www. Answer: C Explanation: To start a new flow-based SPAN (FSPAN) session or flow-based RSPAN (FRSPAN) source or destination session.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/network_ma nagement/command_reference/b_nm_3se_3850_cr/b_nm_3se_3850_cr_chapter_010. | -] options.cisco. If you specify a range of VLANs. use the monitor session filter global configuration command. or to limit (filter) SPAN source traffic to specific VLANs. By default.braindumps. VLAN filtering cannot be enabled. you must enter a space before and after the comma. VLAN monitoring and VLAN filtering are mutually exclusive. You can use the monitor session session_number filter vlan vlan-id command to limit SPAN traffic on trunk source ports to only the specified VLANs. Usage Guidelines You can set a combined maximum of two local SPAN sessions and RSPAN source sessions.com 10 . D.

com 11 .braindumps. A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination E.) A. A monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination F. A monitor session on the distribution switch with a physical interface as the source and a physical interface as the destination Answer: B. RSPAN supports source ports. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three.D Explanation: You can analyze network traffic passing through ports or VLANs by using SPAN or RSPAN to send a copy of the traffic to another port on the switch or on another switch that has been connected to a network analyzer or other monitoring or security device. The www. A remote SPAN VLAN on the distribution and access layer switch C. enabling remote monitoring of multiple switches across your network. SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a destination port for analysis. A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination B.Cisco 300-115 Exam A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. source VLANs.C. and destination ports on different switches (or different switch stacks). A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination D.

B.braindumps. C. while Switch B is configured with channel-group 1 mode desirable.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/122_55_se/configuration/guide/3750xscg/swspan. LACP priority must be configured on both switches. D.Cisco 300-115 Exam traffic for each RSPAN session is carried over a user-specified RSPAN VLAN that is dedicated for that RSPAN session in all participating switches. and the other is using desirable. interface port channel 1 is in the down/down state. The RSPAN traffic from the source ports or VLANs is copied into the RSPAN VLAN and forwarded over trunk ports carrying the RSPAN VLAN to a destination session monitoring the RSPAN VLAN. The switches are using mismatched EtherChannel negotiation modes. You can not mix the LACP and PAGP protocols to form an etherchannel. The switch ports are not configured in trunking mode. Reference: http://www. The destination is always a physical port.cisco. which is an LACP mode. Each RSPAN source switch must have either ports or VLANs as RSPAN sources. The channel group identifier must be different for Switch A and Switch B. Why is the EtherChannel bundle not working? A.html QUESTION NO: 7 After an EtherChannel is configured between two Cisco switches. Here is a summary of the various etherchannel modes: EtherChannel PagP Modes Mode Description auto www. which is a PAGP mode. Switch A is configured with channel-group 1 mode active.com 12 . Answer: A Explanation: Here we have a situation where one switch is using active mode.

com 13 . Desirable Places a port into an active negotiating state. Enable Cisco Express Forwarding to allow for more effective traffic sharing over the EtherChannel bundle. Reference: http://www. www. in which the port starts negotiations with other ports by sending PagP packets. This mode is not supported when the EtherChannel members are from different switches in the switch stack (cross-stack EtherChannel). EtherChannel LACP Modes Mode Description active Places a port into an active negotiating state in which the port starts negotiations with other ports by sending LACP packets. This mode is not supported when the EtherChannel members are from different switches in the switch stack (cross-stack EtherChannel). This setting minimizes the transmission of LACP packets.html QUESTION NO: 8 An EtherChannel bundle has been established between a Cisco switch and a corporate web server. The network administrator noticed that only one of the EtherChannel links is being utilized to reach the web server. Passive Places a port into a passive negotiating state in which the port responds to LACP packets that it receives.braindumps.cisco. in which the port responds to PagP packets it receives but does not start PagP packet negotiation. What should be done on the Cisco switch to allow for better EtherChannel utilization to the corporate web server? A.Cisco 300-115 Exam Places a port into a passive negotiating state.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/122_55_se/configuration/guide/scg_2960/swethchl. This setting minimizes the transmission of PagP packets. but does not start LACP packet negotiation.

since all traffic is going to the same web server). This command is configured globally: monitor session 2 filter vlan 1 – 8. destination mode.cisco. C.braindumps. E. Reference: http://www.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. Adjust the EtherChannel load-balancing method based on destination IP addresses. D. C. Use the option that provides the greatest variety in your configuration. Use link-state tracking to allow for improved load balancing of traffic upon link failure to the server. or Layer 4 port numbers. Filtering a trunked SPAN port effectively disables SPAN operations for all VLANs. Adjust the EtherChannel load-balancing method based on source IP addresses. 52 What is the result of the implemented command? A. if the traffic on a channel only goes to a single MAC address (which is the case in this example. IP addresses.Cisco 300-115 Exam B.html QUESTION NO: 9 Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. use of the destination MAC address results in the choice of the same link in the channel each time. www. 39. All VLAN traffic is sent to the SPAN destination interface. Answer: E Explanation: EtherChannel load balancing can use MAC addresses. and either source mode. Traffic from VLAN 4 is not sent to the SPAN destination interface. For example.com 14 . B. Disable spanning tree on all interfaces that are participating in the EtherChannel bundle. or both. Use of source addresses or IP addresses can result in a better load balance. The mode you select applies to all EtherChannels that you configure on the switch.

html/index. The engineer notices only a single neighbor that uses Cisco Discovery Protocol.Cisco 300-115 Exam D. 39. and 52 is replicated to the SPAN destination port. B. but it has several routing neighbor relationships. The routers are connected via a Layer 2 switch. This example shows how to monitor VLANs 1 through 5 and VLAN 9 when the SPAN source is a trunk interface: Switch(config)# monitor session 2 filter vlan 1 – 5 . Cisco Express Forwarding is enabled locally. E. Even though multiple routing www.html#wp1066836 QUESTION NO: 10 A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided.com/c/en/us/td/docs/switches/lan/catalyst4500/122/25ew/configuration/guide/conf/span. Traffic from VLANs 1 to 8. then each router will only have the single switch port that it connects to as its neighbor. IP routing is disabled on neighboring devices. C. Answer: E Explanation: The “monitor session filter” command is used to specify which VLANS are to be port mirrored using SPAN. What would cause the output to show only the single neighbor? A. 9 Reference: http://www. Cisco Discovery Protocol advertisements are inconsistent between the local and remote devices.com 15 .cisco. The trunk’s native VLAN must be changed to something other than VLAN 1.braindumps. Answer: A Explanation: If all of the routers are connected to each other using a layer 2 switch. D.

QUESTION NO: 11 After the implementation of several different types of switches from different vendors. password. CDP can be used to determine the physical topology. a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible.org/wiki/Link_Layer_Discovery_Protocol QUESTION NO: 12 Several new switches have been added to the existing network as VTP clients. Link Layer Discovery Protocol C. VLANs are not passing from the VTP server (existing network) to the VTP clients. All of the new switches have been configured with the same VTP domain. Local Area Mobility B. NetFlow D. Which vendor-neutral protocol could be used to resolve this issue? A. but not necessarily the logical topology. and neighbors on an IEEE 802 local area network. What must be done to fix this? www.wikipedia. only the physical port that it connects to will be seen as a CDP neighbor.Cisco 300-115 Exam neighbors can be formed over a layer 2 network. LLDP performs functions similar to several proprietary protocols. However. such as the Cisco Discovery Protocol (CDP). Directed Response Protocol Answer: B Explanation: The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity. Reference: http://en. principally wired Ethernet.com 16 . capabilities. and version.braindumps.

If any password is set. make sure that the password is the same on both sides. All VLAN changes must be done on this switch in order to have them propagated to the VTP clients. Provision one of the new switches to be the VTP server and duplicate information from the existing network. •Make sure that the VLANs are active in all the devices. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name. CISCO and cisco are two different domain names.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred. Verify these items if switches that run VTP fail to exchange VLAN information: •VTP information only passes through a trunk port.braindumps. B.Cisco 300-115 Exam A. Reference: http://www. Make sure that if EtherChannels are created between two switches. C. VTP allows a consistent view of the switched network across all switches. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking. only Layer 2 EtherChannels propagate VLAN information. •The VTP domain name must match and it is case sensitive. There are several reasons why the VLAN information can fail to be exchanged. •Make sure that no password is set between the server and client.shtml QUESTION NO: 13 www. •One of the switches must be the VTP server in a VTP domain.com 17 . Answer: D Explanation: VTP allows switches to advertise VLAN information between other members of the same VTP domain. D. Configure a different native VLAN on all new switches that are configured as VTP clients.

C. Reference: http://www.cisco.pd f QUESTION NO: 14 Refer to the exhibit. You must configure extended-range VLANs manually on each network device. which supports extended VLAN propagation. Extended VLANs will not propagate to different IOS versions when extended VLANs are in use. B. What should be configured for extended VLANs? A. Answer: B Explanation: • VTP version 1 and VTP version 2 do not propagate configuration information for extended-range VLANs (VLAN numbers 1006 to 4094). the VLANs in the range 1006 to 4094 are removed from VTP control.com/en/US/docs/switches/lan/catalyst6500/ios/15. www.com 18 . the extended VLANs are not being propagated to other VTP switches.braindumps. Enable VTP version 3.Cisco 300-115 Exam After implementing VTP. Ensure that all switches run the same Cisco IOS version. • VTP version 3 supports extended-range VLANs (VLAN numbers 1006 to 4094). If you convert from VTP version 3 to VTP version 2. VTP does not support extended VLANs and should be manually added to all switches. D. VTP authentication is required when using extended VLANs because of their ability to cause network instability.1SY/config_guide/sup2T/vtp.

Switch B has all VLANs. and C are trunked together and have been properly configured for VTP. but Switch B does not receive any VLAN information.Cisco 300-115 Exam Switch A. and C are trunked together and have been properly configured for VTP. C. B. B.shtml QUESTION NO: 15 Refer to the exhibit. Switch A. The VTP revision number of the Switch B is higher than that of Switch A.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52. The trunk between Switch A and Switch B is misconfigured. A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements.com 19 . What would cause this issue? www. Switch B is configured with an access port to Switch A. D. Switch B is configured in transparent mode. but Switch C is not receiving traffic from certain VLANs. Switch C receives VLAN information from the VTP server Switch A. while Switch C is configured with a trunk port to Switch B. What is the most probable cause of this behavior? A.braindumps. but transparent switches do forward VTP advertisements that they receive out their trunk ports in VTP Version 2. B. Answer: A Explanation: VTP transparent switches do not participate in VTP.cisco. Reference: http://www.

B. VTP pruning blocks unneeded flooded traffic to VLANs on trunk ports that are included in the pruning-eligible list.com 20 . www. The VTP revision number of Switch B is higher than that of Switch A. Answer: C Explanation: VTP pruning increases network available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to reach the destination devices. IEEE 802. multicast. C.” What is the reason for this change? A. Without VTP pruning.Cisco 300-115 Exam A. a switch floods broadcast. The new switches are using RSTP instead of legacy IEEE 802.braindumps. The administrator has defined the switch as the root in the STP domain. The best explanation for why switch C is not seeing traffic from only some of the VLANs.1D STP. A VTP authentication mismatch occurred between Switch A and Switch B. B. VTP pruning is disabled by default. is that VTP pruning has been configured. the network engineer notices that the port roles that were once “blocking” are now defined as “alternate” and “backup. D. D. VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface that is connected to Switch C. The trunk between Switch A and Switch B is misconfigured. C. QUESTION NO: 16 After the recent upgrade of the switching infrastructure. The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco Catalyst switches.1D STP and PortFast have been configured by default on all newly implemented Cisco Catalyst switches. and unknown unicast traffic across all trunk links within a VTP domain even though receiving switches might discard them.

Cisco 300-115 Exam Answer: A Explanation: RSTP works by adding an alternative port and a backup port compared to STP.com 21 . To have two links to the same collision domain. The backup port applies only when a single switch has two links to the same segment (collision domain). After testing. The alternative port moves to the forwarding state if there is a failure on the designated port for the segment. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. RSTP has been enabled per interface and not globally. RSTP bridge port roles: * Root port – A forwarding port that is the closest to the root bridge in terms of path cost * Designated port – A forwarding port for every LAN segment * Alternate port – A best alternate path to the root bridge. What is the reason for this? A. STP is unable to achieve rapid transition for trunk links.cisco. C. www. This path is different than using the root port. B.com/c/en/us/support/docs/lan-switching/spanning-treeprotocol/24062-146. * Backup port – A backup/redundant path to a segment where another bridge port already connects. * Disabled port – Not strictly part of STP. the switch must be attached to a hub. it has been determined that several ports are not transitioning as they should. These ports are allowed to immediately enter the forwarding state rather than passively wait for the network to converge. D. The switch does not have the processing power to ensure rapid transition for all ports.braindumps. a network administrator can manually disable a port Reference: http://www.html QUESTION NO: 17 An administrator recently configured all ports for rapid transition using PortFast.

cisco. most links operate in full-duplex mode and are treated as point-to-point links by RSTP. PBR Answer: C Explanation: VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic.html QUESTION NO: 18 Which technique automatically limits VLAN traffic to only the switches that require it? A. VTP pruning is disabled. By default. This automatic link type setting can be overridden by explicit configuration. while a half-duplex port is considered as a shared port by default.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/vtp. Reference: http://www.Cisco 300-115 Exam Answer: C Explanation: RSTP can only achieve rapid transition to the forwarding state on edge ports and on point-to-point links. This makes them candidates for rapid transition to the forwarding state. In switched networks today. Reference: http://www. and flooded unicast packets to only the switches that require it.html#wp1020444 www.com/c/en/us/support/docs/lan-switching/spanning-treeprotocol/24062-146.braindumps. access lists B. DTP in nonegotiate C. VTP pruning D. such as broadcast. multicast.com 22 .cisco. The link type is automatically derived from the duplex mode of a port. unknown. VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices. A port that operates in full-duplex is assumed to be point-to-point. not on trunk links.

If a VLAN is not specified. Entering the value 0 disables the MAC aging. The MAC address-table will be flushed every 3 minutes. C.com 23 . ARP requests will be processed less frequently by the switch. D. www. This is how long a dynamic MAC address will remain in the CAM table. Step 2 switch(config)# mac-address-table aging-time seconds [vlan vlan_id] Specifies the time before an entry ages out and is discarded from the MAC address table. perform this task: Command Purpose Step 1 switch# configure terminal Enters configuration mode.Cisco 300-115 Exam QUESTION NO: 19 What effect does the mac address-table aging-time 180 command have on the MAC addresstable? A. The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes. B. the aging specification applies to all VLANs. Answer: A Explanation: You can configure the amount of time that an entry (the packet source MAC address and port that packet ingresses) remain in the MAC table.braindumps. the default is 300 seconds. The range is from 0 to 1000000. To configure the aging time for all MAC addresses. E. The default timeout period will be 360 seconds.

a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber. assess.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/MACAddress. macros B. IP Event Dampening D.braindumps. The idea behind requiring administrative action is so that a human engineer can intercede. After the damaged cable was replaced. errdisable autorecovery C.cisco. command aliases E. and a steady recurrence of www. this can be done by issuing shutdown followed by no shutdown on the interface. Bidirectional Forwarding Detection Answer: B Explanation: There are a number of events which can disable a link on a Catalyst switch. the link did not recover. such as the detection of a loopback. However. What solution allows the network switch to automatically recover from such an issue? A. By default. manual intervention by an administrator is necessary to restore the interface to working order.Cisco 300-115 Exam This example shows how to set the aging time for entries in the MAC address table to 600 seconds (10 minutes): switch# configure terminal switch(config)# mac-address-table aging-time 600 Reference: http://www. As designed.html#wp1126206 QUESTION NO: 20 While working in the core network building. or a broadcast storm. some configurations may be prone to accidental violations.com 24 . UDLD failure. and (ideally) correct the issue. the link was placed into a non-forwarding state due to a fault with UDLD.

braindumps. The VLAN receives additional frames from neighboring switches. The VLAN template disables routing in hardware.com/c/en/us/support/docs/switches/catalyst-3750-seriesswitches/44921-swdatabase-3750ss-44921. The SDM VLAN template causes the MAC address-table to overflow. The SDM template is causing the CPU of the switch to spike during peak working hours. by removing an unapproved device) without the need for administrative intervention.net/blog/2009/sep/14/errdisable-autorecovery/ QUESTION NO: 21 A network engineer deployed a switch that operates the LAN base feature set and decides to use the SDM VLAN template. D. The switch needs to be rebooted before the SDM template takes effect. This gives the offending issue a chance to be cleared by the user (for example. Reference: http://packetlife.cisco. Answer: C Explanation: SDM Template Notes: Choosing the VLAN template will actually disable routing (number of entry for unicast or multicast route is zero) in hardware. This is where errdisable autorecovery can be of great assistance.Cisco 300-115 Exam these can amount to a huge time sink for the administrative staff. We can configure the switch to automatically re-enable any error-disabled interfaces after a specified timeout period. What is the root cause of this issue? A.html QUESTION NO: 22 www.com 25 . C. B. Reference: http://www.

cisco. SPAN encapsulation replication must be enabled to capture EtherChannel destination traffic. www. D. After configuring SPAN to monitor this port. the network administrator notices that not all traffic is being replicated to the management server. You can configure ports or EtherChannels in any VLAN as SPAN sources.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/span. Answer: C Explanation: A source port or EtherChannel is a port or EtherChannel monitored for traffic analysis. Reference: http://www. The port channel can be used as a SPAN source. What is a cause for this issue? A.com 26 .braindumps.Cisco 300-115 Exam An access switch has been configured with an EtherChannel port. B. SPAN can monitor one or more source ports or EtherChannels in a single SPAN session.html#wp1040905 QUESTION NO: 23 Refer to the exhibit. A port-channel interface (an EtherChannel) can be a SPAN source. C. RSPAN must be used to capture EtherChannel bidirectional traffic. Trunk ports or EtherChannels can be configured as sources and mixed with nontrunk sources. VLAN filters are required to ensure traffic mirrors effectively. but not a destination. You can configure both Layer 2 and Layer 3 ports and EtherChannels as SPAN sources. but not a destination.

The EtherChannels would form. The table below sum-marizes the results for LACP channel establishment based on the configuration of each side of a link: LACP Channel Establishment S1 S2 www. Answer: B Explanation: An etherchannel will form if one end is active and the other is passive. but network loops would occur because the load-balancing methods do not match. The EtherChannels would not form because the load-balancing method must match on the devices. The EtherChannels would form and function properly even though the load-balancing and EtherChannel modes do not match. B. D.Cisco 300-115 Exam What is the result of the configuration? A. C.com 27 . The EtherChannels would form and both devices would use the dst-ip load-balancing method because Switch1 is configured with EtherChannel mode active.braindumps.

The storm control settings will appear on the EtherChannel. PagP. Reference: http://www.braindumps. or LACP) use the same load-balancing. but not on the associated physical www.html#wp1020804 QUESTION NO: 24 A network engineer tries to configure storm control on an EtherChannel bundle.com/c/en/us/td/docs/switches/lan/catalyst4500/122/54sg/configuration/guide/config/channel. although each switch involved in the etherchannel can have non matching parameters for load balancing. What is the result of the configuration? A. This is true for the switch globally. all channels (manually configured.cisco.Cisco 300-115 Exam Established? On On Yes Active/Passive Active Yes On/Active/Passive Not Configured No On Active No Passive/On Passive No Load balancing can only be configured globally.com 28 . As a result.

Cisco 300-115 Exam ports.html QUESTION NO: 25 What is the function of NSF? A.braindumps. Reference: http://www. The configuration will be rejected because storm control is not supported for EtherChannel. but will only be present on the physical interfaces. The storm control configuration will be accepted.com/c/en/us/td/docs/switches/lan/catalyst4500/122/31sg/configuration/guide/conf/channel. Storm Control must be configured on all or none of the ports. Therefore. Answer: D Explanation: After you configure an EtherChannel. and not at the physical interface level. provide nonstop forwarding in the event of failure of one of the member supervisors www. forward traffic simultaneously using both supervisors B. B. you should configure Storm Control at the EtherChannel Interface level. C.com 29 . any configuration that you apply to the port-channel interface affects the EtherChannel. you cannot configure Storm Control on some of the members of an EtherChannel. those ports will be dropped from the EtherChannel interface (put in suspended state). For example. If you configure Storm Control on only some of the ports. forward traffic based on Cisco Express Forwarding C. provide automatic failover to back up supervisor in VSS mode D. The settings will be applied to the EtherChannel bundle and all associated physical interfaces. Storm Control is an exception to this rule.cisco. any configuration that you apply to the physical interfaces affects only the interface where you apply the configuration. D.

Reference: http://ciscorouterswitch. a Network Administrator noticed that one port stops receiving UDLD packets. the data plane and switch fabric with capacity of 720 Gbps of supervisor engine in each chassis are active at the same time on both chassis. This port continues to reestablish until after eight failed retries. Switches would operate as a single logical virtual switch called a virtual switching system 1440 (VSS1440). boosting nonstop communications. C. D. Which option describes what causes the port to go into the errdisable state? A. Normal UDLD operations that prevent traffic loops. UDLD timers are inconsistent.over-blog.4 Tbps. The port then transitions into the errdisable state.com 30 . VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE.braindumps. and scaling system bandwidth capacity to 1. B. Both chassis are kept in sync with the inter-chassis Stateful Switchover (SSO) mechanism along with Nonstop Forwarding (NSF) to provide nonstop communication even in the event of failure of one of the member supervisor engines or chassis.Cisco 300-115 Exam Answer: D Explanation: VSS is network system virtualization technology that pools multiple Cisco Catalyst 6500 Series Switches into one virtual switch. combining for an active 1400-Gbps switching capacity per VSS. UDLD port is configured in aggressive mode.html QUESTION NO: 26 After UDLD is implemented.com/article-cisco-catalyst-6500-series-vss-1440124536783. when a port on a bidirectional link that has a UDLD www. Answer: B Explanation: With UDLD aggressive mode enabled. In a VSS. Only one of the virtual switch members has the active control plane. increasing operational efficiency. UDLD is enabled globally.

The UDLD port is placed in the “unknown” state for 5 seconds until the next UDLD packet is received on the interface.braindumps.Cisco 300-115 Exam neighbor relationship established stops receiving UDLD packets.html QUESTION NO: 27 After reviewing UDLD status on switch ports. or individually on specific interfaces with the command udld port. the status will transition to bidirectional. Answer: A Explanation: By default. The port will remain operational during this time. The port is fully operational and no known issues are detected. The bidirectional status of “unknown” indicates that the port will go into the disabled state because it stopped receiving UDLD packets from its neighbor. Reference: http://packetlife. an engineer notices that the. After eight failed retries. When UDLD is finally enabled on the other end. C. UDLD is disabled on all interfaces.cisco.com 31 . This enables UDLD in normal mode. D. which is not necessarily an error condition. so when UDLD is first enabled and does not detect a neighbor the link state is considered unknown. the port is disabled. UDLD tries to reestablish the connection with the neighbor.net/blog/2011/mar/7/udld/ www. B. It would be prohibitively difficult to coordinate the configuration of UDLD on both ends of a link at the same time. UDLD moved into aggressive mode after inconsistent acknowledgements were detected. Reference: http://www.” Which statement describes what this indicates about the status of the port? A.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/udld. We can enable UDLD globally on the device.

BackboneFast D. only one of which is forwarding at any given time. it begins using the alternate paths as soon as the spanning tree selects a new root port.com 32 . An uplink group is a set of Layer 2 interfaces (per VLAN). you can accelerate the choice of a new root port when a link or switch fails or when the spanning tree reconfigures itself.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/122_55_se/configuration/guide/scg_2960/swstpopt. as it would with the normal spanning-tree procedures. Reference: http://www. an uplink group consists of the root port (which is forwarding) and a set of blocked ports.cisco. Specifically. PVST+ B.html www.Cisco 300-115 Exam QUESTION NO: 28 Pilot testing of the new switching infrastructure finds that when the root port is lost. PortFast C. except for selflooping ports. Loop Guard F. STP immediately replaces the root port with an alternative root port. Which spanning-tree technology is used to accomplish backup root port selection? A. UplinkFast provides fast convergence after a direct link failure and achieves load balancing between redundant Layer 2 links using uplink groups. UDLD Answer: D Explanation: I f a switch loses connectivity. UplinkFast E. The uplink group provides an alternate path in case the currently forwarding link fails. The root port transitions to the forwarding state immediately without going through the listening and learning states. By enabling UplinkFast with the spanning-tree uplinkfast global configuration command.braindumps.

Which two elements are used to accomplish this? (Choose two. at regular intervals. BPDUs contain information about the sending switch and its ports. cost C. including switch and MAC addresses. switch priority. The path cost value represents the media speed. Reference: http://www. root guard Answer: A. link type E.com 33 .cisco. port priority.Cisco 300-115 Exam QUESTION NO: 29 A network engineer must adjust the STP interface attributes to influence root port selection. called bridge protocol data units (BPDUs). Spanning tree uses this information to elect the root switch and root port for the switched network and the root port and designated port for each switched segment. the spanning-tree port priority and path cost settings control which port is put in the forwarding state and which is put in the blocking state. If a network segment in the spanning tree fails and a redundant path exists.html QUESTION NO: 30 www. port-priority B. forward-timers D. The switches do not forward these frames but use them to construct a loop-free path. When two ports on a switch are part of a loop. and path cost. Switches send and receive spanning-tree frames.) A. The spanning-tree port priority value represents the location of a port in the network topology and how well it is located to pass traffic.B Explanation: Spanning tree forces redundant data paths into a standby (blocked) state.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/122_55_se/configuration/guide/3750xscg/swstp. the spanning-tree algorithm recalculates the spanning-tree topology and activates the standby path.braindumps.

EtherChannel load balancing can use MAC addresses or IP addresses. Ensure that IP CEF is enabled globally to support all load balancing methods. Upgrade the PFC to support the latest load balancing methods.cisco. Configure the new load balancing method using port-channel load-balance. B. Which action must be done to apply a new load balancing method? A.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. Answer: A Explanation: Example: EtherChannel balances the traffic load across the links in a channel through the reduction of part of the binary pattern that the addresses in the frame form to a numerical value that selects one of the links in the channel.html QUESTION NO: 31 Refer to the exhibit. Adjust the switch SDM back to “default”. D. A network engineer investigates a recent network failure and notices that one of the interfaces on www. Reference: http://www. The mode applies to all EtherChannels that are configured on the switch. C. or both source and destination addresses.com 34 . source or destination addresses. You configure the load balancing and forwarding method with use of the port-channel load-balance {dst-ip | dst-mac | src-dst-ip | src-dst-mac | src-ip | src-mac} global configuration command.Cisco 300-115 Exam A network engineer must set the load balance method on an existing port channel.braindumps.

the state of the destination port is up/down by design.braindumps. There is a speed mismatch on the interface. Cisco IOS Embedded Event Manager C. D.Cisco 300-115 Exam the switch is still down.cisco. Answer: C Explanation: With the SAPN destination port. Which option must be enabled to allow for enhanced reporting mechanisms using Cisco Discovery Protocol? A. There is a layer 1 physical issue. C. it is found that rapid error tracking is not currently enabled. What is causing the line protocol on this interface to be shown as down? A. B. logging buffered www. shtml QUESTION NO: 32 While doing network discovery using Cisco Discovery Protocol. Cisco Discovery Protocol version 2 B. Reference: http://www. The interface is configured as the target of the SPAN session. E.com 35 . The interface shows the port in this state in order to make it evident that the port is currently not usable as a production port. There is a duplex mismatch on the interface. This is the normal operational state for SPAN destinations.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c612. The interface is configured as the source of the SPAN session.

xml&pid=2&converted=0 QUESTION NO: 33 Which technique allows specific VLANs to be strictly permitted by the administrator? A. This is the default version on all switches. which is used to track down errors and minimize costly downtime.Cisco 300-115 Exam D. It allows you to track instances even if the native VLAN ID or port duplex states do not match between connecting devices. VLAN access-list E.braindumps. Reference: http://sbkb. L2P tunneling Answer: C Explanation: www. transparent bridging C. trunk allowed VLANs D. VTP pruning B.com 36 .com/CiscoSB/GetArticle. This version is mainly used for backward compatibility. Cisco Discovery Protocol logging options Answer: A Explanation: • CDP Version 1 — This is the first version of CDP which was used for the discovery of Cisco devices in the network.aspx?docid=0ed03cbac49b446ab390a657917d817c_Ci sco_Discovery_Protocol_CDP__Properties_Settings_on_Sx500_S. Cisco Discovery Protocol source interface E.cisco. • CDP Version 2 — This is the most recent version of CDP which has enhanced features such as rapid reporting mechanism.

html QUESTION NO: 34 For security reasons. Apply BPDU guard and BPDU filter. configure “switchport nonegotiate. Disable DTP on a per interface basis. B. use the “switchport trunk allowed vlan remove vlan-list” interface configuration command to remove specific VLANs from the allowed list. you can remove VLANs from the allowed list.1_13_ea1/config uration/guide/swvlan.braindumps.Cisco 300-115 Exam By default. the IT manager has prohibited users from dynamically establishing trunks with their associated upstream switch.com/articles/article. All VLAN IDs.B Explanation: The Dynamic Trunking Protocol (DTP) is used to negotiate forming a trunk between two Cisco devices. Which two actions can prevent interface trunking? (Choose two.” This prevents the interface from generating DTP frames. Reference: http://www. D. To restrict the traffic a trunk carries. 1 to 4094. You can use this command only when the interface switchport mode is access or trunk.asp?p=2181837&seqNum=8 www. preventing traffic from those VLANs from passing over the trunk.com/en/US/docs/switches/lan/catalyst3550/software/release/12. Configure trunk and access interfaces manually. Enable switchport block on access ports. are allowed on each trunk.) A.com 37 . otherwise the link will be a non-trunking link. but may be disabled. C. However.cisco.ciscopress. You must manually configure the neighboring interface as a trunk interface to establish a trunk link. DTP causes increased traffic. a trunk port sends traffic to and receives traffic from all VLANs. Answer: A. To disable DTP. and is enabled by default. Reference: http://www.

) A. Reload the new switch. Restart the VTP process on the new switch. Which action resolves this problem? A. B. Reference: https://learningnetwork. DTP C. HDLC E.1Q or ISL trunking encapsulation.PDF QUESTION NO: 36 A network is running VTPv2. www.braindumps. the switchport trunk encapsulation [dot1q | isl | negotiate] interface command must be used prior to the switchport mode trunk command. After verifying all VTP settings.Cisco 300-115 Exam QUESTION NO: 35 Which two protocols can be automatically negotiated between switches for trunking? (Choose two. PPP B.F Explanation: Switches such as the Catalyst 3550 that are capable of either 802. ISL D.com/servlet/JiveServlet/previewBody/14792-102-157313/Dynamic%20Trunking%20Protocol.cisco. DLCI F. DOT1Q Answer: C.com 38 . the network engineer notices that the new switch is not receiving the list of VLANs from the server.

D. What is the problem? A. Verify connected trunk ports. but it does not appear in plain text in the configuration. the key associated with the password is saved in hexadecimal format in the running configuration. www.braindumps. The first thing that should be done is to verify that the trunk ports are connected and up. C. Another switch in the domain has a higher revision number than the server. The VTP version number must be set to version 3. After each update to the VTP server. When hidden. you can directly configure the password secret key. QUESTION NO: 37 After configuring new data VLANs 1020 through 1030 on the VTP server. a network engineer notices that none of the VTP clients are receiving the updates. Instead.com 39 . When you enter the secret keyword. B.Cisco 300-115 Exam C. E. Answer: B Explanation: VTP version 3 supports these features that are not supported in version 1 or version 2: •Enhanced authentication—You can configure the authentication as hidden or secret. Reload the VTP server. VTP must be stopped and restarted on the server. You must reenter the password if you enter a takeover command in the domain. the secret key from the password string is saved in the VLAN database file. D. Answer: D Explanation: VTP should never need to have the switch reloaded or the VTP process to restart in order for it to work. it takes up to 4 hours propagate. The VTP server must be reloaded.

C. B.cisco. the method runs the pruned VLAN on trunks.html#wp1316856 QUESTION NO: 38 A network engineer is extending a LAN segment between two geographically separated data centers.com/en/US/docs/switches/lan/catalyst3560/software/release/12. and it avoids the use of the spanning tree. Create a Layer 3 transit VLAN to segment the traffic between the sites. VTP-pruned VLANs do not reduce the number of spanning tree port instances. VTP versions 1 and 2 propagate only VLANs 1 to 1005. Instead.2_52_se/configur ation/guide/swvtp. Reference: http://www. If extended VLANs are configured. Configure manual trunk pruning between the two locations.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. • VTP pruning—Avoid this method if the goal is to reduce the number of STP instances. Use VTP pruning on the trunk interfaces. you cannot convert from VTP version 3 to version 1 or 2.com 40 .braindumps.Cisco 300-115 Exam •Support for extended range VLAN (VLANs 1006 to 4094) database propagation. Answer: C Explanation: Pruning unnecessary VLANs from the trunk can be performed with one of two methods: • Manual pruning of the unnecessary VLAN on the trunk—This is the best method. VTP pruning is the best choice. D. Reference: http://www.cisco. VTPpruned VLANs on a trunk are still part of the spanning tree. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing the extended LAN segment? A. Modify the spanning-tree priorities to dictate the traffic flow. Therefore. Since the question asked for the choice that is an enhancement to the STP design.shtml www.

Reference: https://supportforums. Answer: A Explanation: The “switchport trunk allowed vlan” command will only allow the specified VLANs. VTP pruning removed all unused VLANs.braindumps. and overwrite any others that were previously defined. ISL was unable to encapsulate more than the already permitted VLANs across the trunk. and 30) are allowed to traverse the switch trunk interface.com/document/11836/how-define-vlans-allowed-trunk-link QUESTION NO: 40 When you design a switched network using VTPv2. 1000 B. After the command switchport trunk allowed vlan 10. all other existing VLANs no longer pass traffic over the trunk. C. The command effectively removed all other working VLANs and replaced them with the new VLANs. What is the root cause of the problem? A. B. how many VLANs can be used to carry user traffic? A. Allowing additional VLANs across the trunk introduced a loop in the network. 20. 1001 www.cisco.Cisco 300-115 Exam QUESTION NO: 39 The network manager has requested that several new VLANs (VLAN 10.com 41 .20. or use the “issue the switchport trunk allowed vlan add vlan-list” command instead to add these 3 VLANS to the other defined allowed VLANs. You would also need to explicitly allow the other working VLANs to this configuration command.30 is issued. D.

except when the native VLAN is set to 1. D. All frames within the native VLAN are tagged. including control traffic.com 42 . 1024 D. Reference: http://cciememo. Answer: D Explanation: The “vlan dot1q tag native” will tag all untagged frames. 2048 E.blogspot. 4096 Answer: B Explanation: VTP versions 1 and 2 Supports normal VLAN numbers (1-1001).Cisco 300-115 Exam C.com/2012/11/difference-between-vtp-versions. with the defined native VLAN. B. It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s). Only VTP version 3 supports extended VLANs (1-4095). It allows control traffic to pass using the non-default VLAN. C. 4095 F. Control traffic is tagged. www.braindumps.html QUESTION NO: 41 What does the command vlan dot1q tag native accomplish when configured under global configuration? A.

VTP pruning www. capabilities. Cisco Discovery Protocol is not supported.wikipedia.com 43 . Which protocol does the network engineer configure on both devices to accomplish this? A.Cisco 300-115 Exam QUESTION NO: 42 A network engineer has just deployed a non-Cisco device in the network and wants to get information about it from a connected device. so the open standard protocol must be configured. LLTD Answer: B Explanation: The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity. and neighbors on an IEEE 802 local area network. principally wired Ethernet. allowed VLAN list B. LLDP C.braindumps. IRDP B. Which option can be configured to accomplish this? A. NDP D. Reference: http://en.org/wiki/Link_Layer_Discovery_Protocol QUESTION NO: 43 A manager tells the network engineer to permit only certain VLANs across a specific trunk interface. such as the Cisco Discovery Protocol (CDP). LLDP performs functions similar to several proprietary protocols.

To restrict the traffic that a trunk carries. Spanning-Tree FastPort D. Reference: https://supportforums. Spanning-Tree PortFast www. they require the switchport to enter a forwarding state immediately. issue the switchport trunk vlan-List interface configuration command. perform these steps: 1.Cisco 300-115 Exam C.com/document/11836/how-define-vlans-allowed-trunk-link QUESTION NO: 44 For client server failover purposes.com 44 . all of the configured VLANs are allowed to send and receive traffic across the link. the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state. Which spanning-tree feature satisfies this requirement? A. For their disaster recovery feature to operate successfully. VLANs 1 through 1005 are allowed on each trunk by default. Rapid Spanning-Tree B. Spanning-Tree Timers C.braindumps. VLAN traffic can be removed from the allowed list. This removes specific VLANs from the allowed list.cisco. Note: The allowed VLAN list on both the ends of the trunk link should be the same. This keeps traffic from the VLANs from passing over the trunk link. L2P tunneling Answer: A Explanation: When a trunk link is established. For Integrated Cisco IOS Software based switches. VACL D. However.

The port still participates in STP. switch# show spanning-tree vlan 10 B.com 45 . switch# show spanning-tree brief D.aspx?b=CCNP_Studies_Switching&seqNum=36 QUESTION NO: 45 Which command does a network engineer use to verify the spanning-tree status for VLAN 10? A. enable the STP PortFast feature. the port eventually transitions into STP blocking mode.braindumps.Cisco 300-115 Exam E. switch# show spanning-tree vlan 10 brief Answer: A www. PortFast immediately transitions the port into STP forwarding mode upon linkup. switch# show spanning-tree summary E.informit.com/library/content. Spanning-Tree Fast Forward Answer: D Explanation: In order to allow immediate transition of the port into forwarding state. Example configuration: Switch-C# configure terminal Switch-C(config)# interface range fa0/3 . So if the port is to be a part of the loop.24 Switch-C(config-if-range)# sp–nning-tree portfast Reference: http://www. switch# show spanning-tree bridge C.

braindumps.9000 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio.Nbr Type ------------------.---. Example output: SW2#show spanning-tree vlan 10 VLAN0010 Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2.html www.--------------------------Po21 Root FWD 9 128.232 P2p Reference: http://www.57d8.cisco.Cisco 300-115 Exam Explanation: Command Description show spanning-tree Displays information about the spanning-tree state.f2d2.4180 Cost 9 Port 216 (Port-channel21) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32778 (priority 32768 sys-id-ext 10) Address 001c.-------.216 P2p Po23 Altn BLK 9 128.com 46 .--.--------.

D.braindumps. which statement describes what happens when“a do”ain name is configured on one of the switches? A. C. If the switch hears a VTP advertisement it will automatically learn the VTP domain name. If all switches currently have the default VTP domain name "null". B.com 47 . Summary advertisements – sent out every 300 seconds and every time a change occurs on the VLAN database. a switch will have a domain name of NULL and no password. VLANs. The switch with the non-default domain name restores back to "null" upon reboot. VTP summary advertisements are sent out of all ports with the new domain name. Answer: C Explanation: By default.net/configuring-cisco-vtp/ QUESTION NO: 47 www. All other switches with the default domain name become VTP clients. Contained in a summary advertisement: •VTP version •Domain name •Configuration revision number •Time stamp •MD5 encryption hash code Reference: https://rowell.Cisco 300-115 Exam QUESTION NO: 46 A new network that consists of several switches has been connected together via trunking interfaces. Switches with higher revisio“ num”ers does not accept the new domain name. and the configuration revision number.dionicio.

com 48 . Figure 3-15 shows a common network design. and the network administrator typically seeks to achieve load balancing on the access switch uplinks based on even or odd VLANs—or any other scheme deemed appropriate. featuring an access Switch A. The network is expected to grow and add many new VLANs in the future. Which Spanning Tree Protocol should be used to reduce switch resources and managerial burdens that are associated with multiple spanning-tree instances? A. In this setup. RSTP B. Figure 3-15: VLAN Load Balancing www. MST D.Cisco 300-115 Exam A network engineer is setting up a new switched network.1w RST algorithm to multiple spanning trees. uses a minimum number of STP instances to match the number of physical topologies present. The main purpose of MST is to reduce the total number of spanning-tree instances to match the physical topology of the network and thus reduce the CPU cycles of a switch. connected to two Building Distribution submodule Switches D1 and D2. RPVST+ Answer: C Explanation: Multiple Spanning Tree (MST) extends the IEEE 802.braindumps. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies. on the other hand. PVST C. PVST+ E. MST. there are 1000 VLANs.

for example. depending on how the switch is used in the network. The 1000 VLANs map to two MST instances. SDM templates are used to configure a set of ACLs that allows the users to manage the flow of traffic handled by the route processor. E. D.braindumps. C. To allocate hardware resources for different usages.2_55_se www. depending on how the switch is used in the network. Answer: A Explanation: You can use SDM templates to configure system resources in the switch to optimize support for specific features. SDM templates are used to configure system resources in the switch to optimize support for specific features.blogspot. You can select a template to provide maximum system usage for some functions.html QUESTION NO: 48 Which statement about the use of SDM templates in a Cisco switch is true? A. Reference: http://ciscodocuments.cisco. reducing the need for switch resources. and use access template to obtain maximum ACL usage. each switch needs to maintain only two spanning trees.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12. B. use the default template to balance resources. SDM templates are configured by accessing the switch using the web interface.Cisco 300-115 Exam Figure 3-15 illustrates two links and 1000 VLANs. the switch SDM templates prioritize system resources to optimize support for certain features. Rather than maintaining 1000 spanning trees. Reference: http://www. SDM templates are used to configure ACLs that protect networks and specific hosts from unnecessary or unwanted traffic.com/2011/05/chapter-03-implementing-spanningtree_19.com 49 . SDM templates are used to create Layer 3 interfaces (switch virtual interfaces) to permit hosts in one VLAN to communicate with hosts in another VLAN.

You can select SDM templates to optimize these features: • Access—The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs. • Routing—The routing template maximizes system resources for Ipv4 unicast routing.pdf www.pdf QUESTION NO: 49 Which SDM template disables routing and supports the maximum number of unicast MAC addresses? A. Reference: http://www.braindumps. typically required for a router or aggregator in the center of a network. • Default—The default template gives balance to all functions.Cisco 300-115 Exam /configuration/guide/swsdm.com/en/US/docs/switches/lan/catalyst3560/software/release/12. default D.com 50 . VLAN B.2_55_se/configur ation/guide/swsdm.cisco. It would typically be selected for a Layer 2 switch. the switch SDM templates prioritize system resources to optimize support for certain features. access C. routing Answer: A Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages. • VLANs—The VLAN template disables routing and supports the maximum number of unicast MAC addresses.

You can select SDM templates to optimize these features: • Access—The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs. typically required for a router or aggregator in the center of a network. VLAN B. It would typically be selected for a Layer 2 switch. • Routing—The routing template maximizes system resources for Ipv4 unicast routing.braindumps. routing Answer: A Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages. the switch SDM templates prioritize system resources to optimize support for certain features. • VLANs—The VLAN template disables routing and supports the maximum number of unicast MAC addresses (clients). default C. access D.pdf QUESTION NO: 51 In a Cisco switch.com/en/US/docs/switches/lan/catalyst3560/software/release/12.cisco.com 51 . • Default—The default template gives balance to all functions.2_55_se/configur ation/guide/swsdm. what is the default period of time after which a MAC address ages out and is discarded? www. Reference: http://www.Cisco 300-115 Exam QUESTION NO: 50 Which SDM template is the most appropriate for a Layer 2 switch that provides connectivity to a large number of clients? A.

Entering the value 0 disables the MAC aging. Reference: http://www.cisco. 300 seconds D. 600 seconds Answer: C Explanation: To configure the aging time for all MAC addresses. when is a syslog message generated? www.Cisco 300-115 Exam A.com 52 . perform this task: Command Purpose Step 1 switch# configure terminal Enters configuration mode. the aging specification applies to all VLANs. Step 2 switch(config)# mac-address-table aging-time seconds [vlan vlan_id] Specifies the time before an entry ages out and is discarded from the MAC address table.braindumps. If a VLAN is not specified. The range is from 0 to 1000000. 180 seconds C. the default is 300 seconds.html QUESTION NO: 52 If a network engineer applies the command mac-address-table notification mac-move on a Cisco switch port. 100 seconds B.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/MAC Address.

com 53 . Syslog (Optional) Specifies the syslogging facility when the MAC-move notification detects the first instance of the MAC move. Usage Guidelines MAC-move notification generates a syslog message whenever a MAC address or host moves between different switch ports. Mac-address-table notification mac-move [counter [syslog]] no mac-address-table notification mac-move [counter [syslog]] Syntax Description counter (Optional) Specifies the MAC-move counter feature.Cisco 300-115 Exam A.com/en/US/docs/ios/lanswitch/command/reference/lsw_m1.html QUESTION NO: 53 Which option is a possible cause for an errdisabled interface? www. A MAC address or host moves between different switch ports. use the no form of this command. A new MAC address is removed from the content-addressable memory. D. Answer: A Explanation: mac-address-table notification mac-move To enable MAC-move notification. C. Reference: http://www. To disable MAC-move notification.cisco. use the mac-address-table notification mac-move command in global configuration mode. A new MAC address is added to the content-addressable memory.braindumps. B. More than 64 MAC addresses are added to the content-addressable memory.

you must reenable the ports manually. the ports are still disabled if you have not configured errdisable recovery on the switch.Cisco 300-115 Exam A.shtml QUESTION NO: 54 What is the default value for the errdisable recovery interval in a Cisco switch? A. routing loop B. cable unplugged C. 30 seconds B. The reason can be: Reference: http://www.cisco.com 54 . 100 seconds C. In this case. 300 seconds D. 600 seconds Answer: C Explanation: After you fix the root problem. security violation Answer: D Explanation: There are various reasons for the interface to go into errdisable.braindumps.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b. Issue the shutdown command and then the no shutdown interface mode command on the associated interface in www. STP loop guard D.

cisco.-------------udld Disabled bpduguard Disabled security-violatio Disabled channel-misconfig Disabled pagp-flap Disabled dtp-flap Disabled link-flap Disabled l2ptguard Disabled psecure-violation Disabled gbic-invalid Disabled dhcp-rate-limit Disabled mac-limit Disabled unicast-flood Disabled arp-inspection Disabled Timer interval: 300 seconds Interfaces that will be enabled at the next timeout: Note: The default timeout interval is 300 seconds and.shtml www.braindumps.Cisco 300-115 Exam order to manually reenable the ports. cat6knative#show errdisable recovery ErrDisable Reason Timer Status ----------------.com 55 . by default. the timeout feature is disabled.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b. The errdisable recovery command allows you to choose the type of errors that automatically reenable the ports after a specified amount of time. Reference: http://www. The show errdisable recovery command shows the default error-disable recovery state for all the possible conditions.

Power over Ethernet. LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices. D.cisco.braindumps.pdf QUESTION NO: 56 Which statement about Cisco devices learning about each other through Cisco Discovery Protocol is true? A. LLDP-MED is an extension to LLDP that operates between routers that run BGP. www. C. B. Each device sends periodic advertisements to multicast address 01:00:0C:CC:CC:CC. network policy.Cisco 300-115 Exam QUESTION NO: 55 Which statement about LLDP-MED is true? A. B. Each device broadcasts periodic advertisements to all of its neighbors. C. LLDP-MED is an extension to LLDP that operates only between endpoint devices. Reference: http://www.2_58_se/configurat ion/guide/swlldp.com 56 . It specifically provides support for voice over IP (VoIP) applications and provides additional TLVs for capabilities discovery. and inventory management. Answer: A Explanation: LLDP for Media Endpoint Devices (LLDP-MED) is an extension to LLDP that operates between endpoint devices such as IP phones and network devices such as switches. LLDP-MED is an extension to LLDP that operates only between network devices.com/en/US/docs/switches/metro/me3400/software/release/12.

Table 21 Type-Length-Value Definitions for CDPv2 TLV Definition www. hardware platform B. out each connected network interface. memory errors. port-duplex. These multicast packets may be received by Cisco switches and other networking devices that support CDP into their connected network interface.com 57 .spravcesite.Cisco 300-115 Exam Each device sends periodic advertisements to a central device that builds the network topology. native VLAN IDs. Reference: http://network.net/subdom/network/index. native VLAN IDs.braindumps. hardware platform. Answer: A Explanation: Cisco devices send periodic CDP announcements to the multicast destination address 01-00-0ccc-cc-cc. native VLAN IDs. port-duplex. memory errors Answer: A Explanation: Type-Length-Value fields (TLVs) are blocks of information embedded in CDP advertisements. hardware platform D. D.php?id=cdp QUESTION NO: 57 Which option lists the information that is contained in a Cisco Discovery Protocol advertisement? A. Table 21 summarizes the TLV definitions for CDP advertisements. Each device sends periodic advertisements to all IP addresses in its ARP table. memory errors C. port-duplex.

Used by network operators to diagnose connectivity problems between adjacent network elements. Full/Half Duplex TLV Indicates status (duplex configuration) of CDP broadcast interface. Version TLV Contains information about the software release version on which the device is running. Platform TLV Describes the hardware platform name of the device. the assumed VLAN for untagged packets on the interface. Native VLAN TLV Indicates. CDP learns the native VLAN for an interface. Reference: http://www. IP Network Prefix TLV Contains a list of network prefixes to which the sending device can forward IP packets. Eth 1/0. Port-ID TLV Identifies the port on which the CDP packet is sent. per interface.braindumps. Used by network operators to verify VTP domain configuration in adjacent network nodes. This feature is implemented only for interfaces that support the IEEE 802.html www. Capabilities TLV Describes the functional capability for the device in the form of a device type. Address TLV Contains a list of network addresses of both receiving and sending devices.com/en/US/docs/ios/12_2/configfun/configuration/guide/fcf015. for example.1Q protocol. for example. Cisco 4500. VTP Management Domain TLV Advertises the system’s configured VTP management domain name-string.Cisco 300-115 Exam Device-ID TLV Identifies the device name in the form of a character string.com 58 . for example. a switch. This information is in the form of the interface protocol and port number.cisco.

LLDP can discover up to two devices per port.Cisco 300-115 Exam QUESTION NO: 58 Which option describes a limitation of LLDP? A. B.com 59 . Answer: A Explanation: LLDP Versus Cisco Discovery Protocol TLV Comparison Function Description LLDP TLV Cisco Discovery Protocol TLV IP network prefix support-Used to send the network prefix and used for ODR No IP Network Prefix TLV Hello piggybacking-Can be used to piggy back hello messages from other protocols No Protocol Hello TLV Maximum-transmission-unit (MTU) support-Specifies the size of the MTU No MTU TLV External port support-Used to identify the card terminating the fiber in the case of wavelengthdivision multiplexing (WDM) No www. D. C. LLDP does not support TLVs.braindumps. LLDP cannot provide information about VTP. LLDP can discover only Windows servers.

UDLD is a standardized Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. and neighbors on a local area network.com 60 .html QUESTION NO: 59 Which statement about the UDLD protocol is true? A. www. D.cisco.braindumps.com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd804cd4 6d. B. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. capabilities.Cisco 300-115 Exam External Port-ID TLV VTP management support No VTP Management Domain TLV Port unidirectional mode-Used in fiber. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to advertise their identity. C. where the connection may be unidirectional No Port UniDirectional Mode TLV Management address Management Address TLV Management-AddressTLV Allows for organizational unique TLVs Yes No Reference: http://www.

2SX/configuration/guide/udld. normal and standby Answer: A Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD. capabilities. UDLD detects the existence of unidirectional links.braindumps.cisco. www. UDLD can operate in either normal or aggressive mode. Reference: http://www. Answer: A Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD. and neighbors on a local area network. normal and aggressive B. normal and passive E. UDLD puts the affected port into the errdisabled state and alerts the user.com/en/US/docs/switches/lan/catalyst6500/ios/12. When a unidirectional link is detected. UDLD detects the existence of unidirectional links. UDLD puts the affected port into the errdisabled state and alerts the user. normal and active D. active and aggressive C. When a unidirectional link is detected.com 61 .Cisco 300-115 Exam UDLD is a standardized Layer 2 protocol that enables devices to advertise their identity.ht ml QUESTION NO: 60 Which option lists the modes that are available for configuring UDLD on a Cisco switch? A.

Reference: http://www.2SX/configuration/guide/udld.com/en/US/docs/ios-xml/ios/cdp/configuration/15-mt/nm-cdpdiscover.ht ml QUESTION NO: 61 What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements? A.html www. directly connected devices.cisco. and network-independent protocol that networking applications use to learn about nearby. Each device configured for Cisco Discovery Protocol advertises at least one address at which the device can receive messages and sends periodic advertisements (messages) to the well-known multicast address 01:00:0C:CC:CC:CC.com 62 . by default.braindumps. every 60 seconds. Advertisements supported and configured in Cisco software are sent. media-independent. 300 seconds Answer: B Explanation: Cisco Discovery Protocol is a Layer 2. 60 seconds C.com/en/US/docs/switches/lan/catalyst6500/ios/12. which indicates the length of time a receiving device should hold Cisco Discovery Protocol information before discarding it. 30 seconds B. 120 seconds D. They also listen to messages to learn when interfaces on other devices are up or go down. Cisco Discovery Protocol is enabled by default.cisco.Cisco 300-115 Exam Reference: http://www. Advertisements contain time-to-live information. Devices discover each other by listening at that address.

use the “no cdp enable interface” configuration command. use the “no cdp run” command. To disable it globally. C. Answer: A Explanation: CDP is enabled on your router by default.com 63 . CDP also is enabled on supported interfaces by default. D. when a switch is configured to use VTP versions 1 or 2? A.com/en/US/docs/ios/12_2/configfun/command/reference/frf015. CDP is enabled by default and can be disabled globally with the command no cdp enable.cisco. which means the Cisco IOS software will receive CDP information.Cisco 300-115 Exam QUESTION NO: 62 Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true? A. To disable CDP on an interface. Reference: http://www. Extended VLANs are only supported in version 3 and not in versions 1 or 2. transparent B. CDP is disabled by default and can be enabled globally with the command cdp enable. server D.braindumps. B. client C.html#wp1017573 QUESTION NO: 63 Which VTP mode is needed to configure an extended VLAN. CDP is enabled by default and can be disabled globally with the command no cdp run. CDP is disabled by default and can be enabled globally with the command cdp run. www.

16-bit D. Extended-range VLANs are supported only in VTP version 3.com/en/US/docs/switches/lan/catalyst6500/ios/12.wikipedia. 32-bit Answer: B Explanation: The VLAN field is a 12-bit field specifying the VLAN to which the frame belongs. Reference: http://www.094 VLANs Reference: http://en.com 64 .1q frame? A.2SX/configuration/guide/vtp.Cisco 300-115 Exam Answer: D Explanation: VTP version 1 and version 2 support VLANs 1 to 1000 only.cisco. VLANs in the range 1006 to 4094 are removed from VTP control.1Q QUESTION NO: 65 www. 12-bit C. allowing up to 4.org/wiki/IEEE_802. 8-bit B.ht ml QUESTION NO: 64 What is the size of the VLAN field inside an 802. All other values may be used as VLAN identifiers.braindumps. If converting from VTP version 3 to VTP version 2. The hexadecimal values of 0x000 and 0xFFF are reserved.

Cisco 300-115 Exam
What is the maximum number of VLANs that can be assigned to an access switchport without a
voice VLAN?
A.
0
B.
1
C.
2
D.
1024

Answer: B
Explanation:
A standard (non-voice VLAN port) access switch port can belong to only a single VLAN. If more
than one VLAN is needed, the port should be configured as a trunk port.

QUESTION NO: 66
Refer to the exhibit.

Which option shows the expected result if a show vlan command is issued?
A)

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65

Cisco 300-115 Exam

B)

C)

D)

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66

Cisco 300-115 Exam
A.
Exhibit A
B.
Exhibit B
C.
Exhibit C
D.
Exhibit D

Answer: A
Explanation:
In this case, the port has been configured both as a trunk and as a switchport in data vlan 10.
Obviously, a port can not be both, so even though Cisco IOS will accept both, the port will actually
be used as a trunk, ignoring the switchport access VLAN 10 command.

QUESTION NO: 67
Which feature is automatically enabled when a voice VLAN is configured, but not automatically
disabled when a voice VLAN is removed?
A.
portfast
B.
port-security
C.
spanning tree
D.
storm control

Answer: A
Explanation:
Voice VLAN Configuration Guidelines
•You should configure voice VLAN on switch access ports.
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67

Cisco 300-115 Exam
•The voice VLAN should be present and active on the switch for the IP phone to correctly
communicate on the voice VLAN. Use the show vlan privileged EXEC command to see if the
VLAN is present (listed in the display).
•The Port Fast feature is automatically enabled when voice VLAN is configured. When you disable
voice VLAN, the Port Fast feature is not automatically disabled.
Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_22_ea11x/conf
iguration/guide/swvoip.html

QUESTION NO: 68
In which portion of the frame is the 802.1q header found?
A.
within the Ethernet header
B.
within the Ethernet payload
C.
within the Ethernet FCS
D.
within the Ethernet source MAC address

Answer: A
Explanation:
Frame format

Insertion of 802.1Q tag in an Ethernet frame
802.1Q does not encapsulate the original frame. Instead, for Ethernet frames, it adds a 32-bit field
between the source MAC address and the EtherType/length fields of the original frame
Reference: http://en.wikipedia.org/wiki/IEEE_802.1Q

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68

Reference: http://www. all the clients in the VTP domain will automatically enable VTP pruning. Both VTP versions 1 and 2 supports pruning.com/VTP-Pruning. storm control www. VLANs 1-4094 C.php QUESTION NO: 70 Which feature must be enabled to eliminate the broadcasting of all unknown traffic to switches that are not participating in the specific VLAN? A.Cisco 300-115 Exam QUESTION NO: 69 Which VLAN range is eligible to be pruned when a network engineer enables VTP pruning on a switch? A. By default. VLANs 1-1001 B. VTP pruning B. VLANs 2-4094 Answer: C Explanation: VTP pruning should only be enabled on VTP servers.braindumps. VLANs 2-1001 D. port-security C.com 69 . VLANs 2 – 1001 are pruning eligible. but VLAN 1 can’t be pruned because it’s an administrative VLAN.orbit-computer-solutions.

C. All switches in the network receive all broadcasts.com/c/en/us/support/docs/lan-switching/vtp/1055821. Answer: C www. Change VTP mode to server and enable 802. B. even in situations in which few users are connected in that VLAN. D.cisco. Which action resolves this problem? A. bpdguard Answer: A Explanation: VTP ensures that all switches in the VTP domain are aware of all VLANs. The network engineer found that the engineering VLAN is missing from the database. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic. there are occasions when VTP can create unnecessary traffic. Update the VTP revision number. However.Cisco 300-115 Exam D.1q. All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN. Enable VTP pruning and disable 802. Disable VTP pruning and disable 802.com 70 .html#vtp_pruning QUESTION NO: 71 Refer to the exhibit. Reference: http://www. The users in an engineering department that connect to the same access switch cannot access the network.1q.braindumps.1q.

so to enable vlan 10 on this switch you will first need to change the VTP mode from client to server.Cisco 300-115 Exam Explanation: Only VTP servers can add new VLANs to the switched network.braindumps.com 71 . The network switches for two companies have been connected and manually configured for the www. Then. you will need to enable 802. QUESTION NO: 72 Refer to the exhibit.1Q trunking to pass this new VLAN along to the other switches.

Answer: C Explanation: Since the number of existing VLANs differ on the switches (9 on A and 42 on B) we know that there is a problem with VTP or the trunking interfaces. Consider that this is a multivendor environment.dat and ensure that the switch with lowest MAC address is the VTP server. Which Cisco IOS switching feature can be used to achieve the task? A. QUESTION NO: 73 A network engineer must implement Ethernet links that are capable of transporting frames and IP traffic for different broadcast domains that are mutually isolated. The VTP domain names do match and they are both VTP servers so there are no issues there. The only viable solution is that there is a DTP issues and so you must instead manually configure the trunk ports between these two switches so that the VLAN information can be sent to each switch. Inter-Switch Link Answer: C www. Disable DTP and document the VTP domain mismatch. Which action resolves this problem? A.Cisco 300-115 Exam required VLANs. dot1q VLAN trunking D.braindumps. Delete vlan. Link Aggregation Protocol at the access layer C. PPP encapsulation with a virtual template B. D. Enable the company B switch with the vtp mode server command.com 72 . Manually force trunking with switchport mode trunk on both switches. C. B. but users in company A are not able to access network resources in company B when DTP is enabled.

Answer: A Explanation: Cisco Discovery Protocol (CDP) version 2 passes native VLAN information between Cisco switches. www. 802. QUESTION NO: 74 Which statement about using native VLANs to carry untagged frames is true? A.braindumps. Cisco Discovery Protocol version 1 carries native VLAN information. Of these. but versions 1 and 2 do not.1Q and ISL.com 73 . Reference: http://www. only 802.com/articles/article. D.ciscopress.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol. but version 2 does not. B. There are 2 different methods for trunking. Cisco Discovery Protocol version 2 carries native VLAN information.asp?p=29803&seqNum=3 QUESTION NO: 75 Refer to the exhibit. C. but version 1 does not. you will see CDP error messages on the console output. Cisco Discovery Protocol version 3 carries native VLAN information.Cisco 300-115 Exam Explanation: Here the question asks for transporting “frames and IP traffic for different broadcast domains that are mutually isolated” which is basically a long way of saying VLANs so trunking is needed to carry VLAN information. Cisco Discovery Protocol version 1 and version 2 carry native VLAN information. If you have a native VLAN mismatch.

D. www.com/library/content. Which Cisco IOS feature can be used to achieve this task? A. the trunk still remains up for other VLANs. VLAN ID 1 should not be used for management traffic because it’s unsafe.1q trunks are on both sides. C. B.com 74 . not via DTP messages. If spanning tree detects a native VLAN mismatch.informit. Which option is the cause of the spanning-tree error? A.1Q trunks. Failure to do this causes Cisco switches to partially shut down the trunk port because having mismatched native VLANs can result in spanning-tree loops.aspx?b=CCNP_Studies_Switching&seqNum=25 QUESTION NO: 76 A network engineer must improve bandwidth and resource utilization on the switches by stopping the inefficient flooding of frames on trunk ports where the frames are not needed. spanning-tree bpdu-filter is enabled. VLAN 2013 on the multilayer switch is configured as the native VLAN. both with native VLAN mismatch.braindumps. however. Reference: http://www. 802.Cisco 300-115 Exam A multilayer switch has been configured to send and receive encapsulated and tagged frames. Native VLAN mismatches are detected via spanning tree and Cisco Discovery Protocol (CDP). If you use 802. Answer: C Explanation: Here we see that the native VLAN has been configured as 2013 on one switch. you must ensure that you choose a common native VLAN for each port in the trunk. but 1 (the default native VLAN) on the other switch. VLAN spanning-tree in SW-2 is configured. spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on the trunk.

VLAN access-map Answer: A Explanation: Cisco advocates the benefits of pruning VLANs in order to reduce unnecessary frame flooding. Enable VTP pruning on the VTP server. D. which stops the inefficient flooding of frames where they are not needed. Reference: http://www. access list C. The “vtp pruning” command prunes VLANs automatically.Cisco 300-115 Exam VTP pruning B.cisco.com/c/en/us/support/docs/switches/catalyst-6500-seriesswitches/24330-185. Answer: C Explanation: Manaully pruning the default VLAN (1) can only be done with the “switchport trunk allowed vlans www. Manually prune default VLAN with switchport trunk allowed vlans remove. Use trunk pruning vlan 1. switchport trunk allowed VLAN D.html QUESTION NO: 77 Which action allows a network engineer to limit a default VLAN from being propagated across all trunks? A. B. C.com 75 .braindumps. Upgrade to VTP version 3 for advanced feature set support.

1Q tunneling (Q-in-Q) feature increases the frame size by 4 bytes when the extra tag is added.Cisco 300-115 Exam remove” command.cisco. Support 1547 MTU only Answer: B Explanation: The default system MTU for traffic on Catalyst switches is 1500 bytes. Support 1504 MTU or higher C. Support less than 1500 MTU B.1_13_ea1/config uration/guide/swtunnel. QUESTION NO: 78 What is required for a LAN switch to support 802. The “trunk pruning vlan 1” option is not a valid command.html QUESTION NO: 79 Refer to the exhibit.1q Q-in-Q encapsulation? A. you must configure all switches in the service-provider network to be able to process maximum frames by increasing the switch system MTU size to at least 1504 bytes. Support 1522 layer 3 IP and IPX packet D.braindumps. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning. www. Because the 802.com/en/US/docs/switches/lan/catalyst3550/software/release/12. Reference: http://www.com 76 .

B. 4-bytes including native VLAN D. 4-bytes except the native VLAN B. the other two bytes for tag control information (TCI). all VLAN packets are tagged on the trunk link. C. Which action allows interface G0/1 to always actively forward traffic in the port-channel? A. A VLAN tag adds 4 bytes to the frame. www. and G0/4 between two switches using Ethernet port-channel.Cisco 300-115 Exam How many bytes are added to each frame as a result of the configuration? A. except the native VLAN. Configure LACP port-priority on G0/1 to 65535.braindumps. LACP traffic goes through G0/4 because it is the highest interface ID. G0/2. 8-bytes including native VLAN Answer: A Explanation: In 802. Configure LACP port-priority on G0/1 to 1.1Q trunking.com 77 . D. QUESTION NO: 80 A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1. G0/3. 8-bytes except the native VLAN C. Configure G0/1 as half duplex and G0/2 as full duplex. Two bytes are used for the tag protocol identifier (TPID).

The PagP modes are explained below.html#wp1081491 QUESTION NO: 81 Which statement about the use of PagP link aggregation on a Cisco switch that is running Cisco IOS Software is true? A. auto. and on-on allow the formation of a channel. Only the combinations of auto-desirable. PagP modes are active. and on-on allow the formation of a channel. The valid range is from 1 to 65535. Only the combinations active-desirable. The higher the number. desirable. desirabledesirable. the lower the priority. desirable.braindumps. Only the combinations active-active. C. and on. Only the combinations auto-desirable.Cisco 300-115 Exam Answer: B Explanation: A LACP port priority is configured on each port using LACP. and on-on allow the formation of a channel. and on. desirable. and on-on will allow a channel to be www. and on. and on. Answer: A Explanation: PagP modes are off. The port priority can be configured automatically or through the CLI. desirabledesirable. LACP uses the port priority with the port number to form the port identifier. PagP modes are off. PagP modes are active. B. The port priority determines which ports should be put in standby mode when there is a hardware limitation that prevents all compatible ports from aggregating. PagP modes are off. D. and on. desirable. desirable-desirable. and on-on allow the formation of a channel. Reference: http://www. desirabledesirable. and on-on will allow a channel to be formed. The default is 32768. desirabledesirable. Only the combinations auto-desirable.cisco. desirabledesirable.com/c/en/us/td/docs/ios/12_2sb/feature/guide/gigeth. active.com 78 . desirable. auto. Only the combinations auto-auto.

com/c/en/us/support/docs/switches/catalyst-2900-xl-seriesswitches/21041-131.html QUESTION NO: 82 Refer to the exhibit. If a device on one side of the channel does not support PagP. Which EtherChannel negotiation protocol is configured on the interface f0/13 – f0/15? A.Cisco 300-115 Exam formed.cisco. the device on the other side must have PagP set to on. Port Aggregation Protocol www. Reference: http://www.com 79 . Link Combination Control Protocol B. such as a router.braindumps.

Cisco 300-115 Exam C. The Link Aggregate Control Protocol (LACP) trunking supports four modes of operation: In this example. we see that fa 0/13. which is only a PAgP mode. desirabledesirable. which is operating in desirable mode.braindumps. QUESTION NO: 83 Refer to the exhibit. and fa0/15 are all in Port Channel 12. Port Combination Protocol D. desirable. . and on-on will allow a channel to be formed.com 80 . Only the combinations auto-desirable. and on. auto. fa0/14. To increase bandwidth. as shown here: Server_Switch#sh etherchannel load-balance EtherChannel Load-Balancing Operational State (src-mac): Non-IP: Source MAC address IPv4: Source MAC address IPv6: Source IP address Server_Switch# www. Users of PC-1 experience slow connection when a webpage is requested from the server. the network engineer configured an EtherChannel on interfaces Fa1/0 and Fa0/1 of the server farm switch. Link Aggregation Control Protocol Answer: B Explanation: PAgP modes are off.

com 81 . D. QUESTION NO: 84 A network engineer changed the port speed and duplex setting of an existing EtherChannel bundle that uses the PAgP protocol.braindumps. B. and since the load balancing method is source MAC.Cisco 300-115 Exam HoweIer. Answer: C Explanation: Since this traffic is coming from PC-1. Disable EtherChannel load balancing. Change the load-balance method to dst-mac. PAgP changes the port speed and duplex for all ports in the bundle. Upgrade the switch IOS to IP services image. PAgP does not change the port speed and duplex for all ports in the bundle until the switch is rebooted. C. Which statement describes what happens to all ports in the bundle? A. Which action can the engineer take to resolve this issue? A. PAgP drops the ports that do not match the configuration. The load balancing method should be changed to destination MAC. traffic will only be using one of the port channel links. Answer: A www. traffic is still slow. D. the source MAC address will always be that of PC-1. since the web server has two NICs traffic will be load balanced across both MAC addresses. B. C. Contact Cisco TAC to report a bug on the switch. PAgP changes the port speed but not the duplex for all ports in the bundle.

www. Reference: http://www. B. such as a router. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. all ports in the bundle are modified to match that VLAN. desirable.com 82 . D. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel.html QUESTION NO: 85 Which statement about using EtherChannel on Cisco IOS switches is true? A. desirabledesirable.Cisco 300-115 Exam Explanation: PAgP aids in the automatic creation of EtherChannel links. PAgP packets are sent between EtherChannel-capable ports in order to negotiate the formation of a channel. If speed and duplex change when a bundle exists. and on-on allow the formation of a channel. •PAgP modes are off. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 16 Gbps only for Gigabit EtherChannel. PAgP requires that all ports in the channel belong to the same VLAN or are configured as trunk ports. When a bundle already exists and a VLAN of a port is modified. Some restrictions are deliberately introduced into PAgP. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 10 Gbps only for Gigabit EtherChannel. Only the combinations auto-desirable. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. The restrictions are: •PAgP does not form a bundle on ports that are configured for dynamic VLANs. The device on the other side must have PAgP set to on if a device on one side of the channel does not support PAgP. PAgP changes the port speed and duplex for all ports in the bundle.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. C. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel.braindumps.cisco. and on. auto. •PAgP does not group ports that operate at different speeds or port duplex.

Fa0/14.html QUESTION NO: 86 Refer to the exhibit. and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol. Which statement about switch S1 is true? A. The EtherChannel provides full-duplex bandwidth up to 800 Mbps (Fast EtherChannel) or 8 Gbps (Gigabit EtherChannel) between your switch and another switch or host. and all must be configured as either Layer 2 or Layer 3 interfaces.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. Physical port Fa0/13.cisco.com 83 . Each EtherChannel can consist of up to eight compatibly configured Ethernet interfaces. Reference: http://www.Cisco 300-115 Exam Answer: A Explanation: An EtherChannel consists of individual Fast Ethernet or Gigabit Ethernet links bundled into a single logical link. All interfaces in each EtherChannel must be the same speed.braindumps. www.

com 84 . Physical port Fa0/13. which is Cisco proprietary.1d to communicate.1d BPDU and eventually the two switches run 802. QUESTION NO: 87 What happens on a Cisco switch that runs Cisco IOS when an RSTP-configured switch receives 802. but when a RSTP switch receives a 802. www. 802. it responds with a 802. which is a standards based protocol. it responds with an 802. C. Answer: A Explanation: These three ports show that they are in Port Channel 1. and Fa0/15 successfully formed a Layer 3 physical port-channel interface using an open standard protocol. C. B.1d to communicate.braindumps. Logical port Fa0/13.1d understands RSTP BPDUs because they are the same version. 802. 802. Fa0/14.1d does not understand RSTP BPDUs because they are different versions. and Fa0/15 successfully formed a Layer 3 port-channel interface using a Cisco proprietary protocol.1d to communicate. Logical port Fa0/13. 802.Cisco 300-115 Exam B. and the (SU) means they are in use and operating at layer 2. but when a RSTP switch receives a 802.1d BPDU.1d BPDU.1d BPDU? A.1d BPDU and eventually the two switches run 802. Fa0/14. it does not respond with a 802. it does not respond with a 802.1d BPDU and eventually the two switches run 802. The protocol used for this port channel shows as LACP. but when a RSTP switch receives a 802.1d BPDU. Fa0/14.1d BPDU. and Fa0/15 successfully formed a Layer 2 physical port-channel interface using a Cisco proprietary protocol.1d does not understand RSTP BPDUs because they are different versions. D.1d understands RSTP BPDUs because they are the same version. as opposed to PagP. D. but when a RSTP switch receives an 802.1d BPDU.

it assumes that it is connected to an 802.html QUESTION NO: 88 When two MST instances (MST 1 and MST 2) are created on a switch.1D configuration BPDUs and TCN BPDUs on a per-port basis. Reference: http://www. While this timer is active. CIST.1D switch and starts using only 802. it restarts the timer and starts using RSTP BPDUs on that port.1D switches.cisco. RSTP selectively sends 802. in which all the spanning tree instances are independent. www.Cisco 300-115 Exam Answer: A Explanation: For backward compatibility with 802. the migrate-delay timer is started (specifies the minimum time during which RSTP BPDUs are sent). However. 4 Answer: C Explanation: Unlike other spanning tree protocols.1D BPDUs.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/spantree.1D BPDU after the port migration-delay timer has expired. the switch processes all BPDUs received on that port and ignores the protocol type. If the switch receives an 802. 1 B. When a port is initialized. 3 D. if the RSTP switch is using 802. and RSTP BPDUs are sent. what is the total number of spanning-tree instances running on the switch? A.braindumps. MST establishes and maintains IST.com 85 . and CST spanning trees: •An IST is the spanning tree that runs in an MST region.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired. 2 C.

which are encapsulated within MST BPDUs. root path cost.html QUESTION NO: 89 Refer to the exhibit. •A CIST is a collection of the ISTs in each MST region.Cisco 300-115 Exam Within each MST region. www. MST maintains multiple spanning tree instances. All of the other spanning tree instance information is contained in MSTP records (M-records). for example.cisco. The IST is the only spanning tree instance that sends and receives BPDUs. there will be the 2 defined MST instances. such as root bridge ID. even if regions A and B are interconnected. All other MST instances are numbered from 1 to 4094.braindumps.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/spantree. Because the MST BPDU carries information for all instances. but each MST instance has its own topology parameters. In the case for this question. all VLANs are assigned to the IST. Instance 0 is a special instance for a region. •The CST interconnects the MST regions and single spanning trees. Reference: http://www. for a total of 3 instances. By default. All MST instances within the same region share the same protocol timers. and so forth. the number of BPDUs that need to be processed to support multiple spanning tree instances is sernamcantly reduced.com 86 . known as the IST. MST instance 1 in region A is independent of MST instance 1 in region B. and the special 0 instance. An MST instance is local to the region.

D. STP considers port priority when selecting a LAN port to put into the forwarding state.Cisco 300-115 Exam f1/0 and f1/1 have the same end-to-end path cost to the designated bridge.com 87 . Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16. Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0.braindumps. If all LAN ports have the same www. C. B. Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0. Answer: C Explanation: If a loop occurs. You can assign higher priority values to LAN ports that you want STP to select first and lower priority values to LAN ports that you want STP to select last. Which action is needed to modify the Layer 2 spanning-tree network so that traffic for PC1 VLAN from switch SW3 uses switchport f1/1 as a primary port? A. Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16.

braindumps. The possible priority range is 0 through 240 (default 128).cisco. A lower path cost represents higher-speed transmission and is preferred.com/en/US/docs/switches/lan/catalyst2950/software/release/12. STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports. configurable in increments of 16.html#wp1105354 QUESTION NO: 90 Refer to the exhibit. Why would the switch be considered as a root bridge? A. The bridge priority is 1 and all ports are forwarding. Reference: http://www.1_9_ea1/configur ation/guide/swstp.Cisco 300-115 Exam priority value.com 88 . www.

braindumps. The switch priority value is zero. it has the lowest priority value for VLAN 1. All ports are members of VLAN 10.com 89 . the range is 0 to 61440 in increments of 4096. the more likely the switch will be chosen as the root switch. The bridge priority is 128.html#wp1020666 QUESTION NO: 91 Refer to the exhibit. The lower the number.Cisco 300-115 Exam B. Reference: http://www.1_9_ea1/configur ation/guide/swstp. Answer: D Explanation: For priority. D. the default is 32768.cisco. Considering the default cost of upstream bridges to the root www. The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”.com/en/US/docs/switches/lan/catalyst2950/software/release/12. C.19 and all ports are forwarding.

Configure no switchport. Which Layer 2 enhancement can be used to eliminate this delay? A.braindumps.com 90 . interface f0/21 Answer: D Explanation: Root Port election on each bridge Each (non-Root) bridge has exactly one Root Port. so it will be th– root port. Configure spanning-tree portfast. interface f0/15 D.com/extreme/topics/802_1d_spanning_tree_election_rules QUESTION NO: 92 A network engineer is trying to deploy a PC on a network. www.extremenetworks. it takes 30 to 60 seconds for the PC to see any activity on the network interface card. Reference: https://community. D. which option will be the new root port for VLAN 10? A.Cisco 300-115 Exam bridge is equal. Configure port to duplex full and speed 1000. fa0/21 has t–e lowest cost. B. C. interface f0/13 B. which represents the best path to the Root Bridge. The engineer observes that when the PC is connected to the network. In this case. Configure port duplex and speed to auto negotiation. interface f0/14 C.

Cisco 300-115 Exam
Answer: C
Explanation:
When first powered on, each port goes through 4 states to ensure that there are no physical loops
in the layer 2 broadcast domain. These steps are outlined as follows. With the initial version of
spanning tree, this process could take from 30-60 seconds.
1. Blocking – A port that would cause a switching loop, no user data is sent or received but it may
go into forwarding mode if the other links in use were to fail and the spanning tree algorithm
determines the port may transition to the forwarding state. BPDU data is still received in blocking
state.
2. Listening – The switch processes BPDUs and awaits possible new information that would cause
it to return to the blocking state.
3. Learning – While the port does not yet forward frames (packets) it does learn source addresses
from frames received and adds them to the filtering database (switching database)
4. Forwarding – A port receiving and sending data, normal operation. STP still monitors incoming
BPDUs that would indicate it should return to the blocking state to prevent a loop.
STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding
state immediately, bypassing the listening and learning states.
Reference: http://net.cmed.us/Home/ethernet-and-ip/spanning-tree-protocol

QUESTION NO: 93
A network engineer configured an Ethernet switch using these commands.
Switchone(config) # Spanning-tree portfast bpdufilter default
Which statement about the spanning-tree portfast feature on the switch is true?
A.
If an interface is enabled for portfast receives BDPU, the port goes through the spanning-tree
listening, learning, and forwarding states.
B.
If an interface is enabled for portfast receives BDPU, the port does not go through the spanningtree listening, learning, and forwarding states.
C.
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Cisco 300-115 Exam
If an interface is enabled for portfast receives BDPU, the port is shut down immediately.
D.
If an interface is enabled for portfast receives BDPU, the port goes into the spanning-tree
inconsistent state.

Answer: A
Explanation:
STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding
state immediately, bypassing the listening and learning states. However, the “Spanning-tree
portfast bpdufilter default” command specifies that if a BPDU is received on that port, then the
default action of STP of listening, learning, and forwarding states should be used.

QUESTION NO: 94
Which statement describes what happens when a port configured with root guard receives a
superior BPDU?
A.
The port goes into errdisabled state and stops forwarding traffic.
B.
The port goes into BPDU-inconsistent state and stops forwarding traffic.
C.
The port goes into loop-inconsistent state and stops forwarding traffic.
D.
The port goes into root-inconsistent state and stops forwarding traffic.

Answer: D
Explanation:
The root guard ensures that the port on which root guard is enabled is the designated port.
Normally, root bridge ports are all designated ports, unless two or more ports of the root bridge are
connected together. If the bridge receives superior STP Bridge Protocol Data Units (BPDUs) on a
root guard-enabled port, root guard moves this port to a root-inconsistent STP state. This rootinconsistent state is effectively equal to a listening state. No traffic is forIarded across this port. In
this way, the root guard enforces the position of the root bridge.
Reference:
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Cisco 300-115 Exam
http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b.shtml

QUESTION NO: 95
Which statement about restrictions for multichassis LACP is true?
A.
It is available only on a Cisco Catalyst 6500 Series chassis.
B.
It does not support 1Gb links.
C.
Converting a port channel to mLACP can cause a service disruption.
D.
It is not available in VSS.

Answer: C
Explanation:
When configuring mLACP for Server Access, follow these guidelines and restrictions:
•PFC3A mode does not support the mLACP for server access feature.
•VSS mode does not support the mLACP for server access feature.
•No more than 100 VLANs can be active on a switch configured as a PoA.
•mLACP does not support half-duplex links.
•mLACP does not support multiple neighbors.
•Converting a port channel to mLACP can cause a service disruption.
•The DHD system priority must be lower (higher numerically) than the PoA system priority.
Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/mlacp
_server_support.html

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Cisco 300-115 Exam
QUESTION NO: 96
What is the maximum number of 10 Gigabit Ethernet connections that can be utilized in an
EtherChannel for the virtual switch link?
A.
4
B.
6
C.
8
D.
12

Answer: C
Explanation:
The VSS is made up of the following:
• Virtual switch members: Cisco Catalyst 6500 Series Switches (up to two switches with initial
release) deployed with the Virtual Switching Supervisor 720 10GE
• Virtual switch link (VSL): 10 Gigabit Ethernet connections (up to eight using
EtherChannel) between the virtual switch members.
Reference:
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b
.html

QUESTION NO: 97
Which statement describes what happens if all VSL connections between the virtual switch
members are lost?
A.
Both virtual switch members cease to forward traffic.
B.
The VSS transitions to the dual active recovery mode, and both virtual switch members continue
to forward traffic independently.
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The new active virtual switch continues to forward traffic on all links. VSLs can be configured with up to eight links between the two switches across any combination of line cards or supervisor ports to provide a high level of redundancy. If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up. D. B. Reference: http://www. The VSS transitions to the dual active recovery mode. The switch shuts down and waits for the VSL link to be restored before sending traffic.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b .braindumps. Answer: D Explanation: Q. The dual active state is detected rapidly (subsecond) by any of the following three methods: • Enhancement to PagP used in MEC with connecting Cisco switches • L3 Bidirectional Forwarding Detection (BFD) configuration on a directly connected link (besides VSL) between virtual switch members or through an L2 link through an access layer switch • L2 Fast-Hello Dual-Active Detection configuration on a directly connected link (besides VSL) between virtual switch members (supported with 12. the VSS will transition to the dual active recovery mode.cisco. The virtual switch members reload.Cisco 300-115 Exam C. and only the new active virtual switch continues to forward traffic.html QUESTION NO: 98 Which statement describes what happens when a switch enters dual active recovery mode? A.2(33)SXI) In the dual active recovery mode. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. www. What happens if all VSL connections between the virtual switch members are lost? A.com 95 .

Reference: http://www. All other vlans should be left are their default values. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops. Answer: B Explanation: In the dual active recovery mode. 22 and 23. but will need to be modified to support the addition of SwitchB. SwitchA is currently configured correctly.com. SwitchA and SwitchB use Cisco as the enable password. 21. SwitchA needs to be the root switch for vlans 11. 13. but the new active virtual switch forwards traffic on all links. Configuration Requirements for SwitchA The VTP and STP configuration modes on SwitchA should not be modified. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. SwitchB has a minimal configuration. They have just added a new switch (SwitchB) to the existing network as shown in the topology diagram. D.com 96 .html QUESTION NO: 99 CORRECT TEXT SIMULATION Scenario: You work for SWITCH. The new active virtual switch continues to forward traffic on all links. You have been tasked with competing the needed configuring of SwitchA and SwitchB.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b .braindumps.cisco. www. C. The VSS detects which system was last in active state and shuts down the other switch. 12.Cisco 300-115 Exam All interfaces are shut down in the formerly active virtual switch member. RouterA is currently configured correctly and is providing the routing function for devices on SwitchA and SwitchB.

braindumps. The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all vlans. This mode should be done with a nonproprietary protocol.Cisco 300-115 Exam Configuration Requirements for SwitchB Inter-switch Connectivity Configuration Requirements For operational and security reasons trunking should be unconditional and Vlans 1. 21. 22 and 23 should tagged when traversing the trunk link.com 97 . with SwitchA controlling activation. Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. www.

com 98 .braindumps.Cisco 300-115 Exam www.

Cisco 300-115 Exam Answer: Here are steps: Initial Configuration (some lines have been removed) SwA: hostname Sw-A ! vtp mode transparent ! spanning-tree mode rapid-pvst ! vlan 98 ! vlan 99 name TrunkNative ! interface FastEthernet0/1 switchport access vlan 98 switchport mode access www.braindumps.com 99 .

Cisco 300-115 Exam ! interface FastEthernet0/3 switchport access vlan 98 switchport mode access ! interface FastEthernet0/4 switchport access vlan 98 switchport mode access ! interface Vlan1 no ip address shutdown ! end Sw-B: hostname Sw-B ! vtp mode server ! spanning-tree mode pvst ! interface FastEthernet0/3 ! interface FastEthernet0/4 ! interface FastEthernet0/9 ! www.com 100 .braindumps.

Cisco 300-115 Exam interface FastEthernet0/10 ! interface FastEthernet0/13 ! interface FastEthernet0/14 ! interface FastEthernet0/15 ! interface FastEthernet0/16 ! interface Vlan1 no ip address shutdown ! ip default-gateway 192.1 ! end Solution SW-A (close to router) Note: If Sw-A does not have Vlan 11. 13 we have to create them first with command “SWA(config)#vlan 11.12.com 101 .braindumps.168.13” SW-A(config)#spanning-tree vlan 11-13. 12.21-23 root primary SW-A(config)#vlan 21 SW-A(config-vlan)#name Marketing SW-A(config-vlan)#exit SW-A(config)#vlan 22 SW-A(config-vlan)#name Sales SW-A(config-vlan)#exit www.1.

21-23 SW-A(config-if)#no shut Note: When you apply commands under “interface port-channel 1”.Cisco 300-115 Exam SW-A(config)#vlan 23 SW-A(config-vlan)#name Engineering SW-A(config-vlan)#exit SW-A(config)#interface range fa0/3 – 4 SW-A(config-if-range)#no switchport mode access SW-A(config-if-range)#no switchport access vlan 98 (These two commands must be deleted to form a trunking link) SW-A(config-if-range)#channel-group 1 mode active SW-A(config-if-range)#channel-protocol lacp SW-A(config-if-range)#no shutdown SW-A(config-if)#interface port-channel 1 SW-A(config-if)#switchport mode trunk SW-A(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches SW-A(config-if)#switchport trunk allowed vlan 1. ——————————————————————————————– SW-B (far from router) SW-B(config)#vlan 21 SW-B(config-vlan)#name Marketing SW-B(config-vlan)#exit SW-B(config)#vlan 22 SW-B(config-vlan)#name Sales SW-B(config-vlan)#exit SW-B(config)#vlan 23 SW-B(config-vlan)#name Engineering www. the same commands will be automatically applied to the physical member interfaces (of port-channel 1) so you don’t need to type them under physical member interfaces again.braindumps.com 102 .

Cisco 300-115 Exam SW-B(config-vlan)#exit SW-B(config)#vlan 99 SW-B(config-vlan)#name TrunkNative // not necessary to name it but just name it same as SwitchA SW-B(config-vlan)#exit SW-B(config)#interface range fa0/9 – 10 SW-B(config-if-range)#switchport mode access SW-B(config-if-range)#switchport access vlan 21 SW-B(config-if-range)#spanning-tree portfast SW-B(config-if-range)#no shutdown SW-B(config-if-range)#exit SW-B(config)#interface range fa0/13 – 14 SW-B(config-if-range)#switchport mode access SW-B(config-if-range)#switchport access vlan 22 SW-B(config-if-range)#spanning-tree portfast SW-B(config-if-range)#no shutdown SW-B(config-if-range)#exit SW-B(config)#interface range fa0/15 – 16 SW-B(config-if-range)#switchport mode access SW-B(config-if-range)#switchport access vlan 23 SW-B(config-if-range)#spanning-tree portfast SW-B(config-if-range)#no shutdown SW-B(config-if-range)#exit SW-B(config)#vtp mode transparent SW-B(config)#spanning-tree mode rapid-pvst //Same as Sw-A SW-B(config)#ip default-gateway 192.braindumps.1.com 103 .1 (you can get this IP from SW-A with command show cdp neighbour detail) SW-B(config)#interface vlan 1 www.168.

21-23 root primary Configuration Requirements for SwitchB – Vlan 21. 13.braindumps.11 255. 22 and 23.1Q and we have to explicitly set which trunking protocol to be used. 21.1q trunking protocol (switchport trunk encapsulation dot1q) before converting it into a trunk because it is a 3500 series (or higher) switch which supports both ISL and 802. – SwitchA needs to be the root switch for vlans 11. All other vlans should be left are their default values SW-A(config)#spanning-tree vlan 11-13. 12.21-23 SW-B(config-if)#no shut Note: For Sw-B we have to set the 802.com 104 .255. Name: Marketing.168.Cisco 300-115 Exam SW-B(config-if)#ip address 192.255. ——————————————————— Some guidelines for configuring SwitchA & SwitchB: Configuration Requirements for SwitchA – The VTP and STP configuration modes on SwitchA should not be modified. will support two servers attached to fa0/9 and fa0/10 – Vlan 22.0 SW-B(config-if)#no shutdown SW-B(config-if)#exit SW-B(config)#interface range fa0/3 – 4 SW-B(config-if-range)#channel-group 1 mode passive //mode passive because “SwitchA controlling activation” SW-B(config-if-range)#channel-protocol lacp SW-B(config-if-range)#no shutdown SW-B(config-if)#interface port-channel 1 SW-B(config-if)#switchport trunk encapsulation dot1q SW-B(config-if)#switchport mode trunk SW-B(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches SW-B(config-if)#switchport trunk allowed vlan 1. will support two servers attached to fa0/13 and fa0/14 www. Sw-A is a 2900x series (or lower) switch and does not support ISL trunking protocol (802.1. Name: Sales.1Q is the only supported trunking protocol) so we can apply “switchport mode trunk” directly.

255. This mode should be done with a nonproprietary protocol.11 255. spanning-tree mode rapid-pvst – No routing is to be configured on SwitchB.1. vtp mode transparent – SwitchB must operate in the same spanning tree mode as SwitchA.255. interface vlan 1 ip address 192. Although the first requirement asks us to configure trunking but we can ignore this task because we only need to configure trunking under their Port-channel (in the next task) www. will support two servers attached to fa0/15 and fa0/16 – Access ports that connect to server should transition immediately to forwarding state upon detecting the connection of a device.11/24.0 Inter-switch Connectivity Configuration Requirements: – For operational and security reasons trunking should be unconditional and Vlans 1.com 105 . SW-A(config)#interface range fa0/3 – 4 SW-A(config-if)#no switchport mode access SW-A(config-if)#no switchport access vlan 98 Note: Two above commands must be deleted first to form a trunking link.168. 22 and 23 should tagged when traversing the trunk link. – The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all Vlans.168. Name: Engineering.Cisco 300-115 Exam – Vlan 23.braindumps.1. 21. – Only the SVI vlan 1 is to be configured and it is to use address 192. with SwitchA controlling activation. vlan … name … (VLANs must be created on both switches if not exist) interface range fa0/x – y switchport mode access switchport access vlan spanning-tree portfast – SwitchB VTP mode needs to be the same as SwitchA.

21-23 ————————————— SW-B(config)#interface port-channel 1 www. SW-A(config)#interface port-channel 1 SW-A(config-if)#switchport trunk allowed vlan 1. 22 and 23 should tagged when traversing the trunk link: SW-A(config-if)#interface port-channel 1 SW-A(config-if)#switchport mode trunk SW-A(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches SW-A(config-if)#no shut ————————————— SW-B(config)#interface range fa0/3 – 4 SW-B(config-if)#channel-group 1 mode passive SW-B(config-if)#channel-protocol lacp SW-B(config-if)#no shutdown SW-B(config-if)#interface port-channel 1 SW-B(config-if)#switchport trunk encapsulation dot1q SW-B(config-if)#switchport mode trunk SW-B(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches SW-B(config-if)#no shut – Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link.braindumps. 21.com 106 .Cisco 300-115 Exam – The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all Vlans: SW-A(config)#interface range fa0/3 – 4 SW-A(config-if)#channel-group 1 mode active SW-A(config-if)#channel-protocol lacp SW-A(config-if)#no shutdown – Trunking should be unconditional and Vlans 1.

You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1. you can try to ping from SwitchB to RouterA (you can get the IP on RouterA via the show cdp neighbors detail on SwitchA). show vlan (check the native vlan and the existence of vlan99). You do not have access to RouteC. show etherchannel 1 portchannel and show ip int brief(check if Port-channel 1 has been created and make sure it is up). the same command will be applied to physical member interfaces (of port-channel 1) so you don’t need to type them under physical member interfaces again. not sure if it can ping or not. you can use the “ip default-gateway 192. show run (to check everything again). QUESTION NO: 100 CORRECT TEXT SIMULATION You have been tasked with configuring multilayer SwitchC. Company policies forbid the use of static or default routing.Cisco 300-115 Exam SW-B(config-if)#switchport trunk allowed vlan 1. Also SwitchC needs to be able to ping server S1. Some notes for this sim: + You should check the initial status of both switches with these commands: show vtp status (transparent mode on switchA and we have to set the same mode on switchB). Routed interfaces should use the lowest host on a subnet when possible. + At the end. which has a partial configuration and has been attached to RouterC as shown in the topology diagram.com 107 . All routes must be learned via EIGRP 65010 routing protocol. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links.1.1” on SwitchB.168. RouterC is correctly configured. + The name of SwitchA and SwitchB can be swapped or changed so be careful to put your configuration into appropriate switch. + You must create vlan 99 for the switchB. + When using “int range f0/x – y” command hit space bar before and after “-” otherwise the simulator does not accept it.braindumps. No trunking has been configured on RouterC. SwitchA already have vlan 99 configured. The following subnets are available to implement this solution: www.21-23 Note: When configure this command under Port-channel 1. If not. show spanningtree [summary] (rapid-pvst mode on switchA and we have to set the same mode on switchB).

All routes must be learned via the EIGRP routing protocol.10.Cisco 300-115 Exam – 10.10.250.250.0/24 – 190. Note: Due to administrative restrictions and requirements you should not add or delete VLANs. Company policies forbid the use of static or default routing.200.200.com 108 . changes VLAN port assignments or create trunks.32/27 – 190.braindumps. www. Routing must only be enabled for the specific subnets shown in the diagram. SwitchC uses Cisco as the enable password.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway.

com 109 .braindumps.Cisco 300-115 Exam www.

braindumps.Cisco 300-115 Exam Answer: There are two ways to configure interVLAN routing in this case: + Use RouterC as a “router on a stick” and SwitchC as a pure Layer2 switch.200. Click on H1 and H2 and type the “ipconfig” command to get their default gateways.200.250. SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router). We should check the default gateways on H1 & H2.250.33 Host2: + Default gateway: 190. Answer: \>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190. Trunking must be established between RouterC and SwitchC. The question clearly states “No trunking has been configured on RouterC” so RouterC does not contribute to interVLAN routing of hosts H1 & H2 -> SwitchC must be configured as a Layer 3 switch with SVIs for interVLAN routing.65 Now we have enough information to configure SwitchC (notice the EIGRP AS in this case is 650) Note: VLAN2 and VLAN3 were created and gi0/10. gi0/11 interfaces were configured as access www. + Only use SwitchC for interVLAN routing without using RouterC. No trunking requires.com 110 .

and from the PCs as well.255.200. you should expect the ping to SERVER to succeed from the MLS.250.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.0.32 0.255.braindumps. also don’t modify/delete any port just do the above configuration.0 ->RouterC has used IP 10.10. so you will not miss within it in the exam.1 so this is the lowest usable IP address.0.255. If you use wrong AS number.0/16 is not used anywhere else in this topology.10.com 111 .255.10.200.2 255.200.0. the simulator does not let you assign IP address on Gi0/1 interface.255.250.0. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.0. SwitchC(config-if)# ip address 10.65 255.250. in fact it is not necessary because the network 190.255 SwitchC(config-router)# network 190.255. www.10.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190.10.0.0.33 255.224 SwitchC(config-if)# no shutdown SwitchC(config-if)#exit SwitchC(config)# ip routing (Notice: MLS will not work without this command) SwitchC(config)# router eigrp 65010 SwitchC(config-router)# network 10.64 0.31 SwitchC(config-router)# network 190.0 0.200.200. In order to complete the lab. Also make sure you use the correct EIGRP AS number (in the configuration above it is 650 but it will change when you take the exam) but we are not allowed to access RouterC so the only way to find out the EIGRP AS is to look at the exhibit above. no neighbor relationship is formed between RouterC and SwitchC.10.Cisco 300-115 Exam ports so we don’t need to configure them in this sim.250. Also some reports said the “no auto-summary” command can’t be used in the simulator.

32 0.200.braindumps.31 we can use one simple command “network 190.0.250. just for sure. www. even without “no auto-summary” command the network still works correctly. we are pretty sure instead of using two commands “network 190.64 0.0 is shown.200. QUESTION NO: 101 You have been asked to install and configure a new switch in a customer network.com 112 .0.200. But in the exam the sim is just a flash based simulator so we should use two above commands. we can use “show run” command to verify.0. only the summarized network 190.200.0.0.250.31 and “network 190.0. But after finishing the configuration.Cisco 300-115 Exam In fact. Use the console access to the existing and new switches to configure and verify correct device configuration.0 because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised.

braindumps.Cisco 300-115 Exam www.com 113 .

Cisco 300-115 Exam You are connecting the New_Switch to the LAN topology.braindumps. the switch has been partially configured and you need to complete the rest of configuration to enable PC1 communication with PC2. Which of the configuration is correct? www.com 114 .

com 115 .Cisco 300-115 Exam A.braindumps. Option B C. Option C www. Option A B.

Cisco 300-115 Exam D. 3 so either VTP version 2 or 3 can be configured on the new switch. step one is to find the correct VTP name on the other switches. the VTP domain name must match. leaving only choice D as correct. Use the console access to the existing and new switches to configure and verify correct device configuration. so we know that this port must be an access port in VLAN 100. This leaves only choice D and E.braindumps. So. QUESTION NO: 102 You have been asked to install and configure a new switch in a customer network. We also see from the topology diagram that eth 0/0 of the new switch connects to a PC in VLNA 100. Logging in to SW1 and using the “show vtp status” command we see this: So we know that the VTP domain must be CCNP. Note that the VTP versions supported in this network are 1.com 116 . Option D E. www. Option E Answer: D Explanation: Within any VTP. 2.

Cisco 300-115 Exam www.com 117 .braindumps.

Cisco 300-115 Exam www.com 118 .braindumps.

VLAN 999 D. For which configured VLAN are untagged frames sent over trunk between SW1 and SW2? A. VLAN 200 G. www. VLAN 50 F.braindumps. By issuing the “show interface trunk” command on SW1 and SW2 we see the native VLAN is 99. VLAN 40 E.Cisco 300-115 Exam Refer to the configuration. VLAN1 B.com 119 . VLAN 300 Answer: B Explanation: The native VLAN is used for untagged frames sent along a trunk. VLAN 99 C.

com 120 . www.braindumps. Use the console access to the existing and new switches to configure and verify correct device configuration.Cisco 300-115 Exam QUESTION NO: 103 You have been asked to install and configure a new switch in a customer network.

braindumps.com 121 .Cisco 300-115 Exam www.

com 122 .Cisco 300-115 Exam www.braindumps.

Configure VLAN 500 and VLAN 600 on SW2 only D.SW2 and SW4 E. SW2.com 123 . Configure VLAN 500 and VLAN 600 on SW1 only C. www.Cisco 300-115 Exam You are adding new VLANs.braindumps. Configure VLAN 500 and VLAN 600 on SW1 . VLAN500 and VLAN600 to the topology in such way that you need to configure SW1 as primary root for VLAN 500 and secondary for VLAN 600 and SW2 as primary root for VLAN 600 and secondary for VLAN 500. but SW4 is a client. Answer: A Explanation: By issuing the “show vtp status command on SW2. configure back to vtp server mode. Which configuration step is valid? A. On SW2. Configure VLAN 500 & VLAN 600 on both SW1 & SW2 B. so we will need to add both VLANs to SW1 and SW2. and SW4 we see that both SW1 and SW2 are operating in VTP server mode. configure vtp mode as off and configure VLAN 500 and VLAN 600.

braindumps.com 124 .Cisco 300-115 Exam www.

www. Use the console access to the existing and new switches to configure and verify correct device configuration.Cisco 300-115 Exam QUESTION NO: 104 You have been asked to install and configure a new switch in a customer network.braindumps.com 125 .

Cisco 300-115 Exam www.com 126 .braindumps.

Cisco 300-115 Exam Examine the VTP configuration. Disable VTP pruning on SW2 only C.braindumps. Disable VTP pruning on SW4 only www. Disable VTP pruning on SW1 only B.com 127 . Which of the following configuration steps will allow creating private VLANs? A. You are required to configure private VLANs for a new server deployment connecting to the SW4 switch.

Disable VTP pruning on SW2. SW4 and New_Switch E. Answer: A Explanation: Minimum DHCP Snooping Configuration The minimum configuration steps for the DHCP snooping feature are as follows: www. only SW4 will connect to servers in a private VLAN. Enable DHCP snooping for all VLANs that are associated with the switch.braindumps. Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting. Infrastructure Security QUESTION NO: 105 A Cisco Catalyst switch that is prone to reboots continues to rebuild the DHCP snooping database. D. Answer: C Explanation: To create private VLANs. Disable Option 82 for DHCP data insertion. you will need to only disable pruning on the switch that contains the private VLANs. A DHCP snooping database agent should be configured.com 128 . In this case. C. Apply ip dhcp snooping trust on all interfaces with dynamic addresses. Topic 2. E. What is the solution to avoid the snooping database from being rebuilt after every device reboot? A.Cisco 300-115 Exam D. B. Disable VTP pruning on New_Switch and SW4 only.

This step ensures that database entries are restored after a restart or switchover. The feature is not active until you complete this step. 4.techrepublic. DHCP snooping is inactive on all VLANs. 5. Define and configure the DHCP server. Configure the DHCP snooping database agent. 3. authentication C.braindumps.com/en/US/docs/switches/lan/catalyst6500/ios/12. Enable DHCP snooping globally. Enable DHCP snooping on at least one VLAN.cisco. authorization B.html#wp1090479 QUESTION NO: 106 Which portion of AAA looks at what a user has access to? A. Reference: http://www. 2. By default.com 129 .2SX/configuration/guide/snood hcp.com/blog/data-center/what-is-aaa-and-how-do-you-configurewww. By default. Ensure that DHCP server is connected through a trusted interface.Cisco 300-115 Exam 1. accounting D. auditing Answer: A Explanation: AAA consists of the following three elements: Reference: http://www. the trust state of all interfaces is untrusted.

For more protection against malicious attacks. Configure a static DHCP snooping binding entry on the switch. the network team is considering enabling dynamic ARP inspection alongside DHCP snooping. C. B.braindumps. (config)# aaa authentication login login radius local C.Cisco 300-115 Exam it-in-the-cisco-ios/ QUESTION NO: 107 Which command creates a login authentication method named “login” that will primarily use RADIUS and fail over to the local user database? A. so it will primarily use RADIUS for authentication and fail over to the local user database only if the RADIUS server is unreachable. www. Which solution ensures that the server maintains network reachability in the future? A. (config)# aaa authentication login radius local Answer: B Explanation: In the command “aaa authentication login login radius local” the second login is the name of the AAA method. QUESTION NO: 108 A server with a statically assigned IP address is attached to a switch that is provisioned for DHCP snooping. (config)# aaa authentication login default local radius D. It also lists radius first then local. (config)# aaa authentication login default radius local B.com 130 . Disable DHCP snooping information option.

and discards ARP packets with invalid IP-to-MAC address bindings.com 131 . Reference: http://www. This capability protects the network from certain man-in-the-middle attacks. On untrusted interfaces. the DHCP snooping binding database. D.cisco. The switch performs these activities: •Intercepts all ARP requests and responses on untrusted ports •Verifies that each of these intercepted packets has a valid IP-to-MAC address binding before updating the local ARP cache or before forwarding the packet to the appropriate destination. www.html QUESTION NO: 109 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN. To ensure network reachability to the server. B. the switch forwards the packet only if it is valid.braindumps.Cisco 300-115 Exam Trust the interface that is connected to the server with the ip dhcp snooping trust command. Verify the source MAC address of all untrusted interfaces with ip dhcp snooping verify macaddress command.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/122_55_se/configuration/guide/scg3750/swdynarp. Answer: B Explanation: Dynamic ARP inspection is a security feature that validates ARP packets in a network. configure a static DHCP snooping binding entry on the switch. Which configuration must be made before the private VLAN is configured? A. If the ARP packet is received on a trusted interface. •Drops invalid ARP packets Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a trusted database. Disable VTP and manually assign VLANs. Ensure all switches are configured as VTP server mode. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. It intercepts. Dynamic ARP inspection ensures that only valid ARP requests and responses are relayed. logs. the switch forwards the packet without any checks.

An entry in this table has an IP address. B. Reference: http://www. The switch uses the IP source binding table only wIen IP source guard is enabled.asp?p=29803&seqNum=6 QUESTION NO: 110 DHCP snooping and IP Source Guard have been configured on a switch that connects to several client workstations. D. Configure VTP Transparent Mode. Enable VTP version 3. Private VLANs also carry TLVs that are not known to all types of Cisco switches.ciscopress. Answer: D Explanation: The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). The IP address of one of the workstations does not match any entries found in the DHCP binding database. The interface that is connected to the workstation in question will be put into the errdisabled state. Private VLANs are configured in the context of a single switch and cannot have members on other switches.com 132 . Answer: C Explanation: You must configure VTP to transparent mode before you can create a private VLAN. C. Packets from the workstation will be rate limited according to the default values set on the switch. and its associated VLAN number.braindumps. You can configure IP source guard with source IP address filtering. Which statement describes the outcome of this scenario? A. its associated MAC address.com/articles/article. D.Cisco 300-115 Exam C. The packets originating from the workstation are assumed to be spoofed and will be discarded. or with source IP and MAC www. Traffic will pass accordingly after the new IP address is populated into the binding database.

D. However.com 133 . clients are not receiving an IP address via the DHCP server. Answer: A Explanation: When you enable both IP Source Guard and Port Security. Reference: http://www.cisco.braindumps. •The MAC address in the DHCP packet is not learned as a secure address. even if they are not utilized for dynamic address allocation. IP traffic is filtered based on the source IP address. When IP source guard is enabled with this option. or the client is not assigned an IP address. using the ip verify source port-security interface configuration command. the packets are assumed to be spoofed and will be discarded. B. DHCP snooping must be enabled on all VLANs. C.html#ipsourceguard QUESTION NO: 111 A DHCP configured router is connected directly to a switch that has been provisioned with DHCP snooping. The DHCP server does not support information option 82. IP Source Guard with the ip verify source port-security command is configured under the interfaces that connect to all DHCP clients on the switch. Which option is the cause of this issue? A. www.Cisco 300-115 Exam address filtering. The MAC address of the DHCP client is learned as a secure address only when the switch receives non-DHCP data traffic.com/c/en/us/support/docs/switches/catalyst-3750-seriesswitches/72846-layer2-secftrs-catl3fixed. The switch forwards traffic only when the source IP and MAC addresses match an entry in the IP source binding table. When IP source guard is enabled with this option. The switch forwards IP traffic when the source IP address matches an entry in the DHCP snooping binding database or a binding in the IP source binding table. there are two caveats: •The DHCP server must support option 82. IP traffic is filtered based on the source IP and MAC addresses. If there is no match. The DHCP client interfaces have storm control configured. Static DHCP bindings are not configured on the switch.

You can use IP source guard to prevent traffic attacks caused when a host tries to use the IP address of its neighbor. The switch is configured for sdm prefer routing as the switched database management template. The switch uses the IP source binding table only when IP source guard is enabled. Which option is the cause of the problem? A. but is unable to configure ip verify source under several of the interfaces. An entry in this table has an IP address. except for DHCP packets allowed by DHCP snooping. D. You can enable IP source guard when DHCP snooping is enabled on an untrusted interface. The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). IP source guard is supported only on Layer 2 ports.braindumps.html#wp1069615 QUESTION NO: 112 A switch is added into the production network to increase port capacity. Layer 2 interfaces by filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings. The configured SVIs on the switch have been removed for the associated interfaces.cisco. its associated MAC address. A port access control list (ACL) is applied to the interface. and its associated VLAN number.com 134 . the switch blocks all IP traffic received on the interface. The local DHCP server is disabled prior to enabling IP Source Guard. You www.Cisco 300-115 Exam Reference: http://www. Answer: B Explanation: IP source guard is a security feature that restricts IP traffic on nonrouted.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/122_25_see/configuration/guide/3550SCG/swdhcp82. The port ACL allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic. After IP source guard is enabled on an interface. No VLANs exist on the switch and/or the switch is configured in VTP transparent mode. The interfaces are configured as Layer 3 using the no switchport command. B. E. C. A network engineer is configuring the switch for DHCP snooping and IP Source Guard. including access and trunk ports.

multicast. C.) A.html#wp1069615 QUESTION NO: 113 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/122_25_see/configuration/guide/3550SCG/swdhcp82. D. B.braindumps. Reference: http://www. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth.Cisco 300-115 Exam can configure IP source guard with source IP address filtering or with source IP and MAC address filtering. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. F.com 135 . or unicast storm control.D. In which three ways does this command impact the traffic? (Choose three. The keywords have these meanings: •For level. specify the rising threshold level for broadcast.cisco. The switch drops broadcasts when they reach 75% of bandwidth. E. The range is 0. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth. Only broadcast traffic is limited by this particular storm control configuration.F Explanation: storm-control {broadcast | multicast | unicast} level {level [level-low] | pps pps [pps-low]} Configure broadcast. Answer: C. multicast. www. The port blocks traffic when the rising threshold is reached. storm control is disabled.00.00 to 100. or unicast traffic as a percentage (up to two decimal places) of the bandwidth. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. By default.

They decide to configure the network to automate the process of re-enabling user ports.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/122_25_see/configuration/guide/3550SCG/swtrafc.com 136 . This is the default mode. In this case. the broadcast keyword was used so only broadcast traffic is limited.00 to 100.Cisco 300-115 Exam •(Optional) For level-low. switch(config)# errdisable recovery cause security-violation Answer: B Explanation: When a secure port is in the error-disabled state.braindumps. If a port is in per-VLAN errdisable mode. it is set to the rising suppression level. If you do not configure a falling suppression level.cisco.00. switch(config)# switchport port-security protect D. The range is 0. the network team has been overwhelmed with port reset requests. www. switch(config)# errdisable recovery cause psecure-violation C. You can also customize the time to recover from the specified error disable cause (default is 300 seconds) by entering the errdisable recovery interval interval command. Reference: http://www. switch(config)# errdisable recovery interval 180 B. The port forwards traffic when traffic drops below this level. switch(config)# switchport port-security aging type inactivity E.html QUESTION NO: 114 After port security is deployed throughout an enterprise campus. This value must be less than or equal to the rising suppression value. you can bring it out of this state automatically by configuring the errdisable recovery cause psecure-violation global configuration command or you can manually reenable it by entering the shutdown and no shut down interface configuration commands. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port. Which command accomplishes this task? A. specify the falling threshold level as a percentage (up to two decimal places) of the bandwidth.

pdf QUESTION NO: 115 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server. switch# show mac address-table address <mac address> Answer: A. switch# show mac address-table B.braindumps.com 137 .E Explanation: These two commands will show the MAC address table. switch# show ip arp inspection E.) A. switch# show port-security C.cisco. Which two commands help trace this PC when the MAC address is known? (Choose two.Cisco 300-115 Exam Reference: http://www. switch# show ip verify source D.com/c/en/us/td/docs/switches/lan/catalyst4500/122/53SG/configuration/config/port_sec. Here is an example output: Switch> show mac-address-table Dynamic Addresses Count: 9 Secure Addresses (User-defined) Count: 0 Static Addresses (User-defined) Count: 0 System Self Addresses Count: 41 Total MAC addresses: 50 Non-static Address Table: Destination Address Address Type VLAN Destination Port www. including the switch port that the particular host is using.

7b00. storm control B. Errors in the protocol-stack implementation. or unicast storm on a port.1545 Dynamic 2 FastEthernet0/5 QUESTION NO: 116 While troubleshooting a network outage.braindumps. Cisco IOS parser D.Cisco 300-115 Exam ------------------.---. or multicast packets. creating excessive traffic and degrading network performance. By default.e289 Dynamic 1 FastEthernet0/1 0010. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces. integrated routing and bridging E.-------------------0010.-----------. storm control is disabled. mistakes in network configuration.0de0. SDM routing C. www. Storm control uses rising and falling thresholds to block and then restore the forwarding of broadcast. You can also set the switch to shut down the port when the rising threshold is reached. A LAN storm occurs when packets flood the LAN.7b00. multicast. or users issuing a denial-of-service attack can cause a storm.com 138 . unicast. Which option decreases consumption of bandwidth used by broadcast traffic? A. Storm control is configured for the switch as a whole but operates on a per-port basis. Dynamic ARP Inspection Answer: A Explanation: Storm control prevents traffic on a LAN from being disrupted by a broadcast.1540 Dynamic 2 FastEthernet0/5 0010.

html QUESTION NO: 118 Which AAA Authorization type includes PPP. AAA features are not available for use until you enable AAA globally by issuing the aaa new-model command.com 139 . aaa accounting Answer: A Explanation: To configure AAA authentication. aaa authentication C. IP mobile www. aaa authorization D.cisco.html QUESTION NO: 117 Which command globally enables AAA on a device? A.braindumps. Reference: http://www.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen. network B. SLIP. enable AAA by using the aaa new-model global configuration command. aaa new-model B.cisco. and ARAP connections? A.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/121_22ea/SCG/scg/swtrafc.Cisco 300-115 Exam Reference: http://www.

refer to the chapter "Configuring Authentication Proxy" in the "Traffic Filtering“and Firewalls" part of this book” •Comma“ds—Applies to the EXEC mode com”ands a user issues. auth-proxy Answer: A Explanation: Method lists for authorization define the ways that authorization will be performed and the sequence in which these methods will be performed. Method lists enable you to designate one or more security protocols to be used for authorization. thus ensuring a backup system in case the initial method fails. •Network—Applies to network connections. associated with a specific privilege level. EXEC D.com 140 . SLIP. or ARAP connection. or all methods defined are exhausted.cisco. Cisco IOS software uses the first method listed to authorize users for specific network services. •EXEC—Applies to the attributes associated with a user EXEC terminal session. When you create a named method list. •Reverse Access—Applies to reverse Telnet sessions. For detailed information on the authentication proxy feature.html QUESTION NO: 119 www. A method list is simply a named list describing the authorization methods to be queried (such as RADIUS or TACACS+). Command authorization attempts authorization for all EXEC mode commands. This process continues until there is successful communication with a listed authorization method. if that method fails to respond. in sequence. the Cisco IOS software selects the next method listed in the method list.braindumps. you are defining a particular list of authorization methods for the indicated authorization type. This can include a PPP. including global configuration commands.Cisco 300-115 Exam C. Method lists are specific to the authorization type requested: •Auth-proxy—Applies specific security policies on a per-user basis.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathor. Reference: http://www.

pdf QUESTION NO: 120 Refer to the exhibit.1x. www. RADIUS using VSA Answer: A Explanation: With 802.braindumps.Cisco 300-115 Exam Which authentication service is needed to configure 802.1x? A. RADIUS with CoA D. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server.com 141 .cisco. Reference: http://www. the authentication server—performs the actual authentication of the client. RADIUS with EAP Extension B. The authentication server validates the identity of the client and notifies the switch whether or not the client is authorized to access the LAN and switch services. the authentication service is transparent to the client.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/121_19_ea1/configuration/guide/2940scg_1/sw8021x. TACACS+ C. Because the switch acts as the proxy.

Cisco 300-115 Exam

Which login credentials are required when connecting to the console port in this output?
A.
none required
B.
username cisco with password cisco
C.
no username with password linepass
D.
login authentication default

Answer: A
Explanation:
Here the console has been configured with the NO_AUTH name, which lists none as the
authentication method. None means no authentication, meaning that credentials are not required
and all sessions are allowed access immediately.

QUESTION NO: 121
Refer to the exhibit.

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When a network administrator is attempting an SSH connection to the device, in which order does
the device check the login credentials?
A.
RADIUS server, local username, line password
B.
RADIUS server, line password, local username
C.
Line password, local username, RADIUS server
D.
Line password, RADIUS server, local username

Answer: A
Explanation:
The sessions use the vty lines, where the configured authentication method is named “default.”
The AAA default login preference is stated in order from first to last, so here the “aaa
authentication login default group radius local line” means to use RADIUS first, then if that fails
use the local user database. Finally, if that fails use the line password.

QUESTION NO: 122
Which type of information does the DHCP snooping binding database contain?
A.
untrusted hosts with leased IP addresses
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B.
trusted hosts with leased IP addresses
C.
untrusted hosts with available IP addresses
D.
trusted hosts with available IP addresses

Answer: A
Explanation:
DHCP snooping is a security feature that acts like a firewall between untrusted hosts and trusted
DHCP servers. The DHCP snooping feature performs the following activities:
• Validates DHCP messages received from untrusted sources and filters out invalid messages.
• Rate-limits DHCP traffic from trusted and untrusted sources.
• Builds and maintains the DHCP snooping binding database, which contains information
about untrusted hosts with leased IP addresses.
• Utilizes the DHCP snooping binding database to validate subsequent requests from untrusted
hosts.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/snoodhcp.pdf

QUESTION NO: 123
Which switch feature determines validity based on IP-to-MAC address bindings that are stored in a
trusted database?
A.
Dynamic ARP Inspection
B.
storm control
C.
VTP pruning
D.
DHCP snooping
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Answer: A
Explanation:
Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC
address bindings stored in a trusted database, the DHCP snooping binding database. This
database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the
switch. If the ARP packet is received on a trusted interface, the switch forwards the packet without
any checks. On untrusted interfaces, the switch forwards the packet only if it is valid.
Reference: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-seriesswitches/72846-layer2-secftrs-catl3fixed.html

QUESTION NO: 124
Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP
server?
A.
ip dhcp snooping trust
B.
ip dhcp snooping
C.
ip dhcp trust
D.
ip dhcp snooping information

Answer: A
Explanation:
When configuring DHCP snooping, follow these guidelines:
•DHCP snooping is not active until you enable the feature on at least one VLAN, and enable
DHCP globally on the switch.
•Before globally enabling DHCP snooping on the switch, make sure that the devices acting as the
DHCP server and the DHCP relay agent are configured and enabled.
•If a Layer 2 LAN port is connected to a DHCP server, configure the port as trusted by
entering the “ip dhcp snooping trust” interface configuration command.
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The promiscuous port can communicate with all interfaces.braindumps. You can have several promiscuous ports in a primary VLAN. promiscuous port B. associated to that port.html QUESTION NO: 125 Which private VLAN access port belongs to the primary VLAN and can communicate with all interfaces. You may want to do this for loadbalancing or redundancy purposes.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/snoodhcp. Private VLANs block all traffic to isolated ports except traffic from promiscuous ports. including the community and isolated host ports. You can also have secondary VLANs that are not associated to any promiscuous port. that belong to those secondary VLANs associated to the promiscuous port and associated with the primary VLAN. You can have more than one isolated port in a specified isolated VLAN. or no secondary VLANs. This port has complete isolation from other ports within the same private VLAN domain. isolated port C. Reference: http://www. including the community and isolated host ports? A. •Isolated—An isolated port is a host port that belongs to an isolated secondary VLAN. as long as the promiscuous port and secondary VLANs are within the same primary VLAN. community port D. Traffic received from an isolated port is forwarded only to promiscuous ports. trunk port Answer: A Explanation: The types of private VLAN ports are as follows: •Promiscuous—A promiscuous port belongs to the primary VLAN. Each www. except that it can communicate with associated promiscuous ports.Cisco 300-115 Exam •If a Layer 2 LAN port is connected to a DHCP client. Each promiscuous port can have several secondary VLANs. configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command. You can associate a secondary VLAN to more than one promiscuous port.cisco.com 146 .

These interfaces are isolated from all other interfaces in other communities and from all isolated ports within the private VLAN domain. all the traffic remains isolated within each one. promiscuous VLAN Answer: A Explanation: Understanding Primary.com 147 . www. and Community Private VLANs Primary VLANs and the two types of secondary VLANs (isolated and community) have these characteristics: •Primary VLAN— The primary VLAN carries traffic from the promiscuous ports to the host ports. •Isolated VLAN —An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. Each isolated VLAN can have several isolated ports. and to other promiscuous ports. primary VLAN C. isolated VLAN B. Isolated. You can configure multiple isolated VLANs in a private VLAN domain.braindumps.cisco. Community ports communicate with other ports in the same community VLAN and with associated promiscuous ports. Reference: http://www.html QUESTION NO: 126 Which private VLAN can have only one VLAN and be a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports and the gateway? A. both isolated and community.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/PrivateVLANs.Cisco 300-115 Exam port is completely isolated from all other ports in the isolated VLAN. and the traffic from each isolated port also remains completely separate. •Community—A community port is a host port that belongs to a community secondary VLAN. community VLAN D.

com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/PrivateVLANs.braindumps. You can configure multiple community VLANs in a private VLAN domain. • Verifies that a packet has a valid IP-to-MAC address binding before updating the ARP cache or forwarding the packet. • Drops invalid ARP packets. DAI can determine the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a DHCP snooping binding database. The ports within one community can communicate. but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN. It may also contain static entries www.Cisco 300-115 Exam •Community VLAN—A community VLAN is a secondary VLAN that carries upstream traffic from the community ports to the promiscuous port and to other host ports in the same community. This database is built by DHCP snooping when it is enabled on the VLANs and on the device.html QUESTION NO: 127 Which database is used to determine the validity of an ARP packet based on a valid IP-to-MAC address binding? A. Reference: http://www. DHCP snooping database B. static ARP database Answer: A Explanation: Information About Dynamic ARP Inspection DAI is used to validate ARP requests and responses as follows: • Intercepts all ARP requests and responses on untrusted ports.com 148 . dynamic routing database D. dynamic ARP database C.cisco.

Reference: http://www.com/c/en/us/td/docs/switches/datacenter/nexus1000/hyperv/sw/5_2_1_s_m_1_5 _2/troubleshooting/configuration/guide/n1000v_troubleshooting/n1000v_trouble_19dhcp.cisco. • If you are enabling IP source guard on a trunk interface with multiple VLANs and DHCP snooping is enabled on all the VLANs.1x port-based authentication is enabled. If you enter the ip source binding mac-address vlan vlan-id ip-address interface interface-id global configuration command on a routed interface.com 149 . • You can enable this feature when 802. which feature must be enabled on the access VLAN for that interface? A. this error message appears: Static IP source binding can only be configured on switch port. the source IP address filter is applied on all the VLANs. Reference: http://www. • When IP source guard with source IP filtering is enabled on an interface. DHCP snooping must be enabled on the access VLAN for that interface. spanning-tree portfast D.braindumps. storm control C.cisco.Cisco 300-115 Exam that you have created.html QUESTION NO: 128 When IP Source Guard with source IP filtering is enabled on an interface.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15www. DHCP snooping B. private VLAN Answer: A Explanation: IP Source Guard Configuration Guidelines • You can configure static IP bindings only on nonrouted ports.

com 150 .pdf QUESTION NO: 130 Which command would a network engineer apply to error-disable a switchport when a packetstorm is detected? A. multicast. storm control B. Reference: http://3c3cc.braindumps. VLAN trunking Answer: A Explanation: A traffic storm occurs when packets flood the LAN.html QUESTION NO: 129 Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic? A. or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack.com/c/en/us/td/docs/routers/7600/ios/122SR/configuration/guide/swcg/dos. which creates excessive traffic and degrades network performance. router(config-if)#storm-control action shutdown www. VTP pruning D. port security C. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast.Cisco 300-115 Exam 0_2_EX/security/configuration_guide/b_sec_152ex_2960-x_cg/b_sec_152ex_2960x_cg_chapter_01110.

Cisco 300-115 Exam
B.
router(config-if)#storm-control action trap
C.
router(config-if)#storm-control action error
D.
router(config-if)#storm-control action enable

Answer: A
Explanation:
Configuring the Traffic Storm Control Shutdown Mode
To configure the traffic storm control shutdown mode on an interface, perform this task:

Command
Purpose
Step 1
Router(config)# interface {{type1 slot/port} | {port-channel number}}
Selects an interface to configure.
Step 2
Router(config-if)# storm-control action shutdown
(Optional) Configures traffic storm control to error-disable ports when a traffic storm occurs.
•Enter the no storm-control action shutdown command to revert to the default action (drop).
•Use the error disable detection and recovery feature, or the shutdown and no shutdown
commands to reenable ports.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/storm.html

QUESTION NO: 131
A network engineer configures port security and 802.1x on the same interface. Which option
describes what this configuration allows?
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Cisco 300-115 Exam
A.
It allows port security to secure the MAC address that 802.1x authenticates.
B.
It allows port security to secure the IP address that 802.1x authenticates.
C.
It allows 802.1x to secure the MAC address that port security authenticates.
D.
It allows 802.1x to secure the IP address that port security authenticates.

Answer: A
Explanation:
802.1X and Port Security
You can configure port security and 802.1X on the same interfaces. Port security secures the
MAC addresses that 802.1X authenticates. 802.1X processes packets before port security
processes them, so when you enable both on an interface, 802.1X is already preventing inbound
traffic on the interface from unknown MAC addresses.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nxos/security/configuration/guide/sec_nx-os-cfg/sec_portsec.html

QUESTION NO: 132
Which feature describes MAC addresses that are dynamically learned or manually configured,
stored in the address table, and added to the running configuration?
A.
sticky
B.
dynamic
C.
static
D.
secure

Answer: A
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Cisco 300-115 Exam
Explanation:
With port security, you can configure MAC addresses to be sticky. These can be dynamically
learned or manually configured, stored in the address table, and added to the running
configuration. If these addresses are saved in the configuration file, the interface does not need to
dynamically relearn them when the switch restarts. Although sticky secure addresses can be
manually configured, it is not recommended.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/122/25ew/configuration/guide/conf/port_sec.pdf

QUESTION NO: 133
On which interface can port security be configured?
A.
static trunk ports
B.
destination port for SPAN
C.
EtherChannel port group
D.
dynamic access point

Answer: A
Explanation:
Port Security and Port Types
You can configure port security only on Layer 2 interfaces. Details about port security and different
types of interfaces or ports are as follows:
•Access ports—You can configure port security on interfaces that you have configured as Layer 2
access ports. On an access port, port security applies only to the access VLAN.
•Trunk ports—You can configure port security on interfaces that you have configured as Layer 2
trunk ports. VLAN maximums are not useful for access ports. The device allows VLAN maximums
only for VLANs associated with the trunk port.
•SPAN ports—You can configure port security on SPAN source ports but not on SPAN destination
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Cisco 300-115 Exam
ports.
•Ethernet Port Channels—Port security is not supported on Ethernet port channels.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nxos/security/configuration/guide/sec_nx-os-cfg/sec_portsec.html

QUESTION NO: 134
When you configure private VLANs on a switch, which port type connects the switch to the
gateway router?
A.
promiscuous
B.
community
C.
isolated
D.
trunked

Answer: A
Explanation:
There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port.
Host port further divides in two types – Isolated port (I-Port) and Community port (C-port).
Reference: http://en.wikipedia.org/wiki/Private_VLAN

QUESTION NO: 135
When you configure a private VLAN, which type of port must you configure the gateway router port
as?
A.
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it is necessary to restrict access to VLAN 20 in the following manner: Users connecting to VLAN 20 via portfO/1 on ASW1 must be authenticated before they are given access to the network. DSW1 and ASW1. Filtering should be implemented as close to the server farm as possible.40. access port Answer: A Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. Reference: http://en. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server. isolated port C. community port D.Cisco 300-115 Exam promiscuous port B. www. Devices on VLAN 20 are restricted to the subnet of 172.120.0/24 should be allowed on VLAN 20. Packets from devices in the subnet of 172. For security reasons.120.120.com 155 .braindumps.40. Packets from devices in any other address range should be dropped on VLAN 20.wikipedia.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches. The topology diagram indicates their layer 2 mapping. Authentication is to be done via a Radius server: Radius server host: 172.0/24. Corporate polices do not allow layer 3 functionality to be enabled on the switches.46 Radius key: rad123 Authentication should be implemented as close to the host as possible.40. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port).org/wiki/Private_VLAN QUESTION NO: 136 CORRECT TEXT SIMULATION SWITCH.

com 156 . You must use the available IOS switch features.Cisco 300-115 Exam The Radius server and application servers will be installed at a future date.braindumps. You have been tasked with implementing the above access control as a pre-condition to installing the servers. Note: Named access list is not supported. www.

46 key rad123 ASW1(config)#aaa authentication dot1x default group radius ASW1(config)#dot1x system-auth-control ASW1(config)#inter fastEthernet 0/1 ASW1(config-if)#switchport mode access ASW1(config-if)#dot1x port-control auto ASW1(config-if)#exit ASW1#copy run start Step2: Console to DSW1 from PC console 2 DSW1(config)#ip access-list standard 10 DSW1(config-ext-nacl)#permit 172.120.40.0.0.255 DSW1(config-ext-nacl)#exit DSW1(config)#vlan access-map PASS 10 DSW1(config-access-map)#match ip address 10 www.braindumps.Cisco 300-115 Exam Answer: The configuration: Step1: Console to ASW1 from PC console 1 ASW1(config)#aaa new-model ASW1(config)#radius-server host 172.0 0.39.com 157 .120.

the hot standby priority on the device on which tracking has been configured decreases by 10. backup interface D.Cisco 300-115 Exam DSW1(config-access-map)#action forward DSW1(config-access-map)#exit DSW1(config)#vlan access-map PASS 20 DSW1(config-access-map)#action drop DSW1(config-access-map)#exit DSW1(config)#vlan filter PASS vlan-list 20 DSW1#copy run start Topic 3. standby track Answer: D Explanation: The standby track interface configuration command ties the router hot standby priority to the availability of its interfaces and is useful for tracking interfaces that are not configured for HSRP.com 158 . standby group B. Infrastructure Services QUESTION NO: 137 Which configuration command ties the router hot standby priority to the availability of its interfaces? A. its state changes do not affect the hot standby priority of the configured device. standby priority C. you can configure a separate list of interfaces to be tracked. If an interface is not tracked. For each interface configured for hot standby.braindumps. Reference: www. When a tracked interface fails.

the default priority is 100. •(Optional) delay—Set to cause the local router to postpone taking over the active role for the shown number of seconds. it assumes control as the active router. 1024 Answer: B Explanation: standby [group-number] priority priority [preempt [delay delay]] Set a priority value used in choosing the active router. Use the no form of the command to restore the default values.cisco. 100 C. the default is 0 (no delay before taking over). •(Optional) group-number—The group number to which the command applies. The range is 0 to 36000 (1 hour).html#wp1044327 www.1_19_ea1/config uration/guide/swhsrp.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_19_ea1/config uration/guide/swhsrp. •(Optional) preempt—Select so that when the local router has a higher priority than the active router.cisco.Cisco 300-115 Exam http://www. 50 B. 120 D.html QUESTION NO: 138 What is the default HSRP priority? A.com 159 .com/en/US/docs/switches/lan/catalyst3550/software/release/12. The highest number represents the highest priority. Reference: http://www. The range is 1 to 255.braindumps.

The VSS system creates a single logical router at Layer 3. removes the need for a First Hop Redundancy Protocol Answer: D Explanation: First Hop Redundancy Protocols (FHRPs) such as VRRP and HSRP were designed to allow for a highly available first IP route hop for host systems. reduces cost B.cisco.html QUESTION NO: 140 Which First Hop Redundancy Protocol is an IEEE Standard? A.braindumps.com 160 . This VSS routing instance fulfills this firsthop role without the need for a dedicated protocol.com/en/US/docs/solutions/Enterprise/Data_Center/vssdc_integrate. www. provides two independent supervisors with two different control planes D. FHRPs allow two (or more) distinct routers to share a common IP address providing a redundant Layer-3 default gateway for end nodes. VSS eliminates the need for FHRP at the aggregation layer of the data center. Reference: http://www. HSRP C. simplifies configuration C. The VSS IP route is highly available due to MEC and the resiliency of the VSS system.Cisco 300-115 Exam QUESTION NO: 139 Which option is a benefit of using VSS? A. GLBP B.

.up to 1024 virtual routers (GLBP groups) per physical interface.up to 4 AVF routers on the group (Active Virtual Forwarder) passing traffic.com 161 . . OSPF Answer: C Explanation: A comparison of the three First Hop Redundancy Protocols are listed below: ProtocolFeatures HSRP (Hot Standby Router protocol) VRRP (Virtual Redundancy Router Protocol) GLBP (Gateway Load Balancing Protocol) Router role . . if not.1 master router.1 AVG (Active Virtual Gateway). Scope Cisco proprietary IEEE standard Cisco proprietary Election Active Router:1-Highest Priority2-Highest IP (tiebreaker) www..braindumps. .Use virtual ip address.1 or more listening routers.1 active router.Cisco 300-115 Exam VRRP D..1 standby router.1 or more backup routers. the one with highest priority become master... .Use virtual ip address.Can use real router ip address..

braindumps.Cisco 300-115 Exam Master Router: (*)1-Highest Priority2-Highest IP (tiebreaker) Active Virtual Gateway:1-Highest Priority2-Highest IP (tiebreaker) Optimization features Tracking yes yes yes Preempt yes yes yes Timer adjustments yes yes yes Traffic type 224.0.18 – IP 112 224.0.0.0.0.com 162 .0.102 udp 3222 Timers Hello – 3 seconds Advertisement – 1 second Hello – 3 seconds (Hold) 10 seconds (Master Down Interval)3 * Advertisement + skew time (Hold) 10 seconds (Skew time)(256-priority) / 256 www.0.2 – udp 1985 (version1)224.102-udp 1985 (version2) 224.0.

5 C. Load-balancing oriented. . www. 10 D.(generally through DHCP) Clients are transparently updated with virtual MAC according to load-balancing algorithm through ARP requesting a unique virtual gateway.com 163 .Multiple HSRP group per interface/SVI/routed int.(generally through DHCP) Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing.Cisco 300-115 Exam Load-balancing functionality .com/2008/08/23/router-high-availability-protocolcomparison-2/ QUESTION NO: 141 What is the default amount by which the hot standby priority for the router is decremented or incremented when the interface goes down or comes back up? A. 1 B.Weighted algorithm.braindumps. Reference: http://cciethebeginning.Host-dependent algorithm.Multiple VRRP group per interface/SVI/routed int. Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing. ..wordpress. 15 Answer: C Explanation: The standby track interface configuration command ties the router hot standby priority to the availability of its interfaces and is useful for tracking interfaces that are not configured for HSRP.Round-Robin algorithm (default).

html QUESTION NO: 142 What is the maximum number of virtual MAC addresses that GLBP allows per group? A. A virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html#wp1039651 www. Reference: http://www. the hot standby priority on the device on which tracking has been configured decreases by 10. A virtual forwarder that has learned the virtual MAC address is referred to as a secondary virtual forwarder. Other members of the GLBP group learn the virtual MAC addresses from hello messages. For each interface configured for hot standby.Cisco 300-115 Exam When a tracked interface fails.com/en/US/docs/switches/lan/catalyst3550/software/release/12.com 164 .1_19_ea1/config uration/guide/swhsrp. 2 B. If an interface is not tracked. The AVG is responsible for assigning the virtual MAC addresses to each member of the group. its state changes do not affect the hot standby priority of the configured device. 6 D.cisco. 8 Answer: B Explanation: GLBP Virtual MAC Address Assignment A GLBP group allows up to four virtual MAC addresses per group. Other group members request a virtual MAC address after they discover the AVG through hello messages. Reference: http://www. 4 C. you can configure a separate list of interfaces to be tracked. Gateways are assigned the next MAC address in sequence.braindumps.

com 165 . active virtual gateway D. The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address.Cisco 300-115 Exam QUESTION NO: 143 Which gateway role is responsible for answering ARP requests for the virtual IP address in GLBP? A. active virtual forwarder B. active virtual router C. www.braindumps. These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses.cisco. Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. Reference: http://www. The AVG assigns a virtual MAC address to each member of the GLBP group.html QUESTION NO: 144 Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router? A. designated router Answer: C Explanation: GLBP Active Virtual Gateway Members of a GLBP group elect one gateway to be the active virtual gateway (AVG) for that group. Other group members provide backup for the AVG in the event that the AVG becomes unavailable.

Cisco 300-115 Exam virtual router master B. IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address(es’. A VRRP Router may backup one or more virtual routers. virtual router active D. will respond to packets addressed to one of these IP addresses for ICMP pings. This is the router that. It may participate in one or more virtual routers. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN. Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN. Primary IP Address An IP address selected from the set of real www. virtual router standby Answer: A Explanation: VRRP Definitions VRRP Router A router running the Virtual Router Redundancy Protocol.com 166 . etc. when up. TCP connections. virtual router backup C.braindumps.

and answering ARP requests for these IP addresses.Cisco 300-115 Exam interface addresses. standby 1 track 100 decrement 20 Answer: A www. standby 1 track 100 B.ietf.braindumps. Reference: http://www. standby 1 track 100 decrement 5 D. Virtual Router Master The VRRP router that is assuming the responsibility of forwarding packets sent to the IP address(es) associated with the virtual router. Note that if the IP address owner is available. then it will always become the Master. One possible selection algorithm is to always select the first address.org/rfc/rfc3768.com 167 . VRRP advertisements are always sent using the primary IP address as the source of the IP packet. standby 1 track 100 decrement 1 C.txt QUESTION NO: 145 Which command correctly configures standby tracking for group 1 using the default decrement priority value? A.

The “standby follow” command configures an HSRP group to become a slave of another HSRP group. standby group backup Answer: C Explanation: Perform this task to configure multiple HSRP client groups. standby follow D. www. standby slave B.com 168 .cisco.Cisco 300-115 Exam Explanation: The default decrement value for HSRP standby tracking is 10. There is no need to explicitly state the value if the desired value is the default value.html QUESTION NO: 147 Refer to the exhibit. standby group track C. random delay so that all client groups do not change at the same time.com/en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp-hsrpmgo. QUESTION NO: 146 Which command configures an HSRP group to become a slave of another HSRP group? A.braindumps. Reference: http://www. HSRP client groups follow the master HSRP with a slight.

Cisco 300-115 Exam Which option describes the reason for this message in a GLBP configuration? A. In order to resolve this issue. HSRP configured on same interface as GLBP D.255.0. then some other device with a MAC address reports this error message. then it indicates that this router is receiving its own hello packets sent.com 169 . Verify the spanning-tree topology and check if there is any layer2 loop.0. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224. Reference: http://www. Layer 2 loop Answer: D Explanation: This section provides information you can use to troubleshoot your configuration.braindumps. If the interface MAC address is different from the one reported in the error message.0.shtml#dr www. Unavailable GLBP active forwarder B.com/en/US/products/hw/switches/ps708/products_configuration_example09186a 00807d2520. If the MAC address of the interface is the same as the one reported in the error message.255. permit the Multicast address by permit 224. issue the show interface command to verify the MAC address of the interface.0.102 and User Datagram Protocol (UDP) port 3222 (source and destination). When configuring the multicast boundary command.255.0 15. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues. Incorrect GLBP IP address C.cisco.

Cisco 300-115 Exam QUESTION NO: 148 Ferris Plastics. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. unless GigabitEthernet1/0/1 on backup device has also failed. • DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105 • DSW2 – primary device for VLAN 103 and VLAN 104 • A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. you have been asked to investigate and respond to the following question.com 170 . Troubleshooting has identified several issues. www. Currently all interfaces are up. Using the running configurations and show commands. Inc. is a medium sized company. with an enterprise network (access. The distribution switches are configured to use HSRP to provide a high availability solution.braindumps.

GigabitEthernet1/0/1 on DSW1 was shut down. All other interfaces were up. What needs to be done to make the group for VLAN 101 function properly? A. Enable preempt in the VLAN 101 HSRP group on DSW1. Disable preempt in the VLAN 101 HSRP group on DSW2’s.Cisco 300-115 Exam During routine maintenance. DSW1 did not become the active router for VLAN 101 as desired. However. after GigabitEthemet1/0/1 on DSW1 was reactivated.com 171 . B. decrease the priority value to avaluethatis less ‘ than the www. C. In the VLAN 101 HSRP group on DSW1.braindumps. DSW2 became the active HSRP device for VLAN 101 as desired.

you have been asked to investigate and respond to the following question. The distribution switches are configured to use HSRP to provide a high availability solution. with an enterprise network (access. Decrease the decrement value in the track command for the VLAN 101 HSRP group on U DSWTs to a values less than the value in the track command for the VLAN 101 HSRP group on DSW2. Currently all interfaces are up. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Inc. • DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105 • DSW2 – primary device for VLAN 103 and VLAN 104 • A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device.Cisco 300-115 Exam priority value configured in the VLAN 101 HSRP group on DSW2. www. is a medium sized company. Troubleshooting has identified several issues.com 172 . D. unless GigabitEthernet1/0/1 on backup device has also failed.braindumps. Answer: A Explanation: QUESTION NO: 149 Ferris Plastics. Using the running configurations and show commands.

Cisco 300-115 Exam www.braindumps.com 173 .

All other interfaces were up. Answer: C Explanation: www. You have determined that there is an issue with the decrement value in the track command for the VLAN 102 HSRP group. DSW1 remained the active device for the VLAN 102 HSRP group. C. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1.com 174 . The decrement value on DSWTs should be greaterthan 190 and less than 200. D.braindumps. The decrement value on DSW1 should be greaterthan 5 and less than 15. E. What needs to be done to make the group function properly? A. 0 B. The decrement value on DSW1 should be greaterthan 11 and less than 19.Cisco 300-115 Exam During routine maintenance. The decrement value on DSWTs should be greaterthan 195 and less than 205. During this time. The decrement value on DSW1 should be greaterthan 9 and less than 15.

com 175 . www. Priority value is 200.braindumps. Troubleshooting has identified several issues. Because 200 – 11 = 189 < 190 (priority of Vlan102 on DS2). Using the running configurations and show commands. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Inc.Cisco 300-115 Exam Use “show run” command to show. The distribution switches are configured to use HSRP to provide a high availability solution. Currently all interfaces are up. you have been asked to investigate and respond to the following question. The left Vlan102 is console1 of DS1. with an enterprise network (access. is a medium sized company. • DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105 • DSW2 – primary device for VLAN 103 and VLAN 104 • A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. unless GigabitEthernet1/0/1 on backup device has also failed. we should decrement value in the track command from 11 to 18. QUESTION NO: 150 Ferris Plastics.

D.com 176 .Cisco 300-115 Exam All interfaces are active. www. On DSW2.braindumps. On DSW1. B. disable preempt. C. decrease the priority value to a value less than 190 and greater than 150. As related to the VLAN 103 HSRP group. On DSW1. DSW2 has not become the active device for the VLAN 103 HSRP group. increase the priority value to a value greater 200 and less than 250. what can be done to make the group function properly? A.

Inc. but it should be less than 250 so that if the gig 1/0/1 interface goes down.com 177 . DSW1 will become active. with an enterprise network (access. you have been asked to investigate and respond to the following question. • DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105 • DSW2 – primary device for VLAN 103 and VLAN 104 • A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. while the local priority is 190. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Using the running configurations and show commands. unless GigabitEthernet1/0/1 on backup device has also failed. increase the decrement value in the track command to a value greater than 10 and less than 50. is a medium sized company. we see that the active router has a priority of 200. www. Answer: C Explanation: From the output shown below of the HSRP status of DSW2. Troubleshooting has identified several issues.Cisco 300-115 Exam On DSW2. but less than 250. DSW2 is configured to decrement the priority by 50 if this interface goes down. The distribution switches are configured to use HSRP to provide a high availability solution. QUESTION NO: 151 Ferris Plastics.braindumps. Currently all interfaces are up. We need to increase the priority of DSW2 to greater than 200. so the correct answer is to increase the priority to more than 200.

com 178 .braindumps.Cisco 300-115 Exam www.

Cisco 300-115 Exam During routine maintenance. B. increase the decrement value in the track command to a value greater than 6. decrease the decrement value in the track command to a value less than 1. Vlan104 (left): 150 – 1 = 149. If increase the decrement in the track value to a value greater than 6 (> or = 6). Result is priority 149 > 145 (Vlan104 on DS1 is active). During this time. what can to be done to make the group function properly? A. you will make Vlan104’s HSRP group fail function. D. All other interfaces were up. Vlan104 (left): 150 – www. On DSW1. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1 and DSW2. On DSW1. In this question. As related to the VLAN 104HSRP group. By do that. Answer: C Explanation: We should NOT disable preempt on DS1. Example: if we are disable preempt on DS1.braindumps. C. It can not become active device when G1/0/1 on DS2 fail.com 179 . disable preempt. DSW1 became the active router for the VLAN 104HSRP group. G0/1/0 on DS1 & DS2 is shutdown. Vlan104 (right): 200 – 155 = 145. On DSW2 decrease the priority value to a value less than 150. On DSW1.

Troubleshooting has identified several issues. Result is priority 144 < 145 (vlan104 on DS2 is active). unless GigabitEthernet1/0/1 on backup device has also failed. QUESTION NO: 152 Ferris Plastics. www. is a medium sized company.braindumps. you have been asked to investigate and respond to the following question. with an enterprise network (access. Using the running configurations and show commands. Inc. Currently all interfaces are up.Cisco 300-115 Exam 6 = 144. The distribution switches are configured to use HSRP to provide a high availability solution.com 180 . • DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105 • DSW2 – primary device for VLAN 103 and VLAN 104 • A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.

200 www. 150 D.braindumps. 50 B.Cisco 300-115 Exam What is the priority value of the VLAN 105 HSRP group on DSW2? A. 100 C.com 181 .

you have been asked to investigate and respond to the following question. unless GigabitEthernet1/0/1 on backup device has also failed. Currently all interfaces are up. www. The distribution switches are configured to use HSRP to provide a high availability solution. Inc. with an enterprise network (access.Cisco 300-115 Exam Answer: C Explanation: Use "show standby brief" command on console2.braindumps. is a medium sized company. Using the running configurations and show commands.primary device for VLAN 103 and VLAN 104 • A failure–of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. Troubleshooting has identified several issues.com 182 . QUESTION NO: 153 Ferris Plastics. • DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 • D–W2 . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Very easy to see that the priority of Vlan105 is 150.

Cisco 300-115 Exam www.braindumps.com 183 .

and the tracking feature for Gig 1/0/0 is enabled which will decrement the priority by 10 if this interface goes down for a priority value of 90. www.braindumps. 150 D.Cisco 300-115 Exam If GigabitEthemet1/0/1 on DSW2 is shutdown.com 184 . the current priority for VLAN 105 is 100. 100 C. 200 Answer: A Explanation: Explanation As seen below. what will be the resulting priority value of the VLAN 105 HSRP group on router DSW2? A. 90 B.

Cisco 300-115 Exam QUESTION NO: 154 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. Click on the devices or the tabs at the bottom of the screens to access the CLI to answer their questions. www.com 185 . They have questions about how these two devices will perform in the event of a device failure.braindumps.

Cisco 300-115 Exam What percentage of the outgoing traffic from the 172.16.0/24 subnet is being forwarded through R1? A. R1-0% B.braindumps. R2-100% www. R2-50% C. R1-50 %.10.com 186 .

so all outgoing traffic will be forwarded to R1. www. we see that R1 is the active standby router for the Ethernet 0/0 link.braindumps.Cisco 300-115 Exam D. R1-100% Answer: D Explanation: Based on the following output.com 187 . QUESTION NO: 155 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. Click on the devices or the tabs at the bottom of the screens to access the CLI to answer their questions. They have questions about how these two devices will perform in the event of a device failure.

braindumps.Cisco 300-115 Exam www.com 188 .

The interface will have its current priority incremented by 60 for HSRP group 1 E. The interface will have the priority decremented by 40 for HSRP group 1.com 189 . The interface will have the priority decremented by 60 for HSRP group 1 C. B. If router R1 interface Etherne0/0 goes down and recovers.braindumps. which of the statement regarding HSRP priority is true? A.Cisco 300-115 Exam Refer to the exhibit. The interface will have its current priority incremented by 40 for HSRP group 1 D. The interface will default to the a priority of 100 for HSRP group 1 Answer: C Explanation: Here is the HSRP configuration seen on R1: www.

it will then increment it by 40 back to 130 for HSRP group 1. They have questions about how these two devices will perform in the event of a device failure.com 190 . However. QUESTION NO: 156 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.braindumps. when the Ethernet 0/0 interface goes down. when it comes back up. the standby 1 track decrement command will lower the priority from 130 to 90. www. Click on the devices or the tabs at the bottom of the screens to access the CLI to answer their questions.Cisco 300-115 Exam Here.

braindumps.com 191 .Cisco 300-115 Exam www.

The HSRP timers mismatch E.Cisco 300-115 Exam What issue is causing Router R1 and R2 to both be displayed as the HSRP active router for group 2? A. The HSRP group number mismatch B. The HSRP Hello packets are blocked D. The HSRP group authentication is misconfigured C. but not on R1: www. The HSRP group priorities are different Answer: B Explanation: Based on the configuration output.com 192 . we see that authentication is configured on R2.braindumps.

www.com 193 . They have questions about how these two devices will perform in the event of a device failure. QUESTION NO: 157 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.Cisco 300-115 Exam This can be further verified by issuing the “show standby” command on each router. Click on the devices or the tabs at the bottom of the screens to access the CLI to answer their questions.braindumps.

com 194 .Cisco 300-115 Exam www.braindumps.

com 195 .0000.ac02 F.ac02 B. 0000.0010 as shown below: www. 0000.0c07.braindumps. 4000.0010 C. 4000.ac01 E.0c07. 4000.0000.ac01 D. 0000.Cisco 300-115 Exam What is the virtual mac-address of HSRP group 1? A.0c07.0000.0010 Answer: B Explanation: Issuing the “show standby” command on either router shows us that the virtual MAC used by HSRP group 1 is 4000.0000.

a network analyzer is connected to Port f0/1 of a LAN switch.braindumps. When troubleshooting a network problem. spanning-tree portfast bpduguard enable www.Cisco 300-115 Exam Topic 4.com 196 . Mix QUESTIONS QUESTION NO: 158 Refer to the exhibit. Which command can prevent BPDU transmission on this port? A.

E Explanation: QUESTION NO: 160 www. system ID E. no spanning-tree link-type shared Answer: C Explanation: QUESTION NO: 159 Which four LACP components are used to determine which hot-standby links become active after an interface failure within an EtherChannel bundle? (Choose four.) A.D. port number F. hot-standby link identification number G. spanning-tree portfast bpdufilter default D.com 197 .braindumps. LACP port priority C.B. spanning-tree bpduguard default C. interface MAC address D. LACP system priority B. interface bandwidth Answer: A.Cisco 300-115 Exam B.

braindumps.com 198 . Normal UDLD operations that prevent traffic loops. Answer: A Explanation: QUESTION NO: 161 After UDLD is implemented. The port then transitions into the errdisable state. traffic is not being replicated to the remote switch. B.Cisco 300-115 Exam RSPAN has been configured on a Cisco Catalyst switch. B. The local RSPAN switch is replicating only Rx traffic to the remote switch. Which type of misconfiguration is a cause? A. UDLD timers are inconsistent. The local switch is overloaded with the amount of sourced traffic that must be replicated to the remote switch. The local and remote RSPAN switches are configured using different session IDs. The RSPAN designated VLAN is missing the remote span command. D. This port continues to reestablish until after eight failed retries. UDLD port is configured in aggressive mode. Answer: B Explanation: www. C. C. a Network Administrator noticed that one port stops receiving UDLD packets. however. UDLD is enabled globally. D. Which option describes what causes the port to go into the errdisable state? A.

BPDUblock B. Which version of spanning tree is appropriate to meet the company policy? A. BPDUignore D. BPDUdisable www. BPDUfilter C. end user connectivity is still required. Which spanning-tree feature accomplishes this? A. STP Answer: A Explanation: QUESTION NO: 163 A network engineer is installing a switch for temporary workers to connect to.braindumps.Cisco 300-115 Exam QUESTION NO: 162 To follow the Layer 2 switching guidelines. however. RSTP D.com 199 . BPDUguard E. RPVST+ E. a network engineer decides to create a separate spanning tree for every group of 10 VLANs. The engineer does not want this switch participating in Spanning Tree with the rest of the network. MST B. PVST+ C.

braindumps. C. reload B. shutdown www.Cisco 300-115 Exam Answer: B Explanation: QUESTION NO: 164 Refer to the exhibit. B.com 200 . Answer: A Explanation: QUESTION NO: 165 When SDM templates are configured. Configure a SPAN session to monitor the received traffic on interface g0/5 only for VLAN 3. What is the result of the SPAN configuration on a Cisco switch? A. Configure a SPAN session to monitor the received traffic on interface g0/4 only for VLAN 3. which action must be performed for the configuration to take effect? A. Configure a SPAN session to monitor the received traffic on interface g0/4 for all VLANs except VLAN 3. D. Configure a SPAN session to monitor the received traffic on interface g0/5 for all VLANs except VLAN 3.

A sticky MAC address can be a unicast or multicast address. write memory D. Answer: A Explanation: QUESTION NO: 167 Enablement of which feature puts the port into err-disabled state when the port has PortFast enabled and it receives BPDUs? A.com 201 . D. www. B. A sticky MAC address is retained when the switch reboots. backup config Answer: A Explanation: QUESTION NO: 166 Which statement about the MAC address sticky entries in the switch when the copy run start command is entered is true? A.Cisco 300-115 Exam C. A sticky MAC address ages out of the MAC address table after 600 seconds. A sticky MAC address is lost when the switch reboots.braindumps. C. BackboneFast C. BPDU filtering B.

BPDU guard Answer: D Explanation: QUESTION NO: 168 Refer to the exhibit. DSW1(config)#cdp timer 30 www.Cisco 300-115 Exam EtherChannel D. DSW1(config)#cdp timer 90 B.com 202 . DSW1(config-if)#cdp holdtime 60 C. Which configuration ensures that the Cisco Discovery Protocol packet update frequency sent from DSW1 to ALS1 is half of the default value? A.braindumps.

They go down until they are reassigned to a VLAN. 802.braindumps.com 203 . but they are reassigned to the default VLAN. D. They remain up. and then the VLAN is deleted.Cisco 300-115 Exam D. but they are reassigned to the native VLAN. B. They go down. They remain up. Answer: B Explanation: QUESTION NO: 170 Which feature is automatically configured when an administrator enables a voice VLAN? A. Which state are these interfaces in after the VLAN is deleted? A. DSW1(config)#cdp holdtime 90 E. C.1Q trunking B. DSW1(config-if)#cdp holdtime 30 F. DSW1(config-if)#cdp timer 60 Answer: C Explanation: QUESTION NO: 169 Interfaces are assigned to a VLAN. PortFast www. but they are reassigned to the default VLAN.

Answer: B Explanation: QUESTION NO: 172 A network administrator configures 10 extended VLANs ranging from VLANs 3051 to 3060 in an enterprise network. version 2 www. It can cause routing loops. private VLANs Answer: B Explanation: QUESTION NO: 171 Which statement describes one major issue that VTP can cause in an enterprise network when a new switch is introduced in the network in VTP mode server? A. It can cause network access ports to go into err-disabled state. D. C.com 204 .braindumps. QoS D. It can cause a network-wide VLAN configuration change if the revision number on the new switch is lower. B. version 1 B. It can cause a network-wide VLAN configuration change if the revision number on the new switch is higher.Cisco 300-115 Exam C. Which version of VTP supports these extended VLANs? A.

desirable D. If the EtherChannel mode on switch 1 is configured to active.Cisco 300-115 Exam C. The IP address is placed on the highest numbered member port.E Explanation: QUESTION NO: 174 When a Layer 2 EtherChannel is configured. on E. VTP does not recognize extended VLANs. auto C. www.braindumps. version 3 D.com 205 . which statement about placement of the IP address is true? A. active B.) A. Answer: C Explanation: QUESTION NO: 173 An engineer is configuring an EtherChannel between two switches using LACP. passive Answer: A. which two modes on switch 2 establish an operational EtherChannel? (Choose two.

com 206 . Answer: B Explanation: QUESTION NO: 175 Which option is valid for EtherChannel load balancing? A. www. source MAC address and source IP address B. D. destination MAC address and destination IP address C. source MAC address and destination IP address D. source MAC address and destination MAC address Answer: D Explanation: QUESTION NO: 176 Refer to the exhibit.braindumps. C.Cisco 300-115 Exam B. The IP address is placed on the lowest numbered member port. The IP address is assigned via DHCP only. The IP address is placed on the port-channel logical interface.

Answer: D Explanation: QUESTION NO: 177 Refer to the exhibit. The EtherChannel protocols do not match.com 207 . C. which option describes the reason for this error? A. D.braindumps. The port channel interface numbers do not match. Switch 1 does not have enough member ports configured. Based on the output. Switch 2 has too many member ports configured. B.Cisco 300-115 Exam An engineer is configuring EtherChannel between two switches and notices the console message on switch 2. www.

and VLAN-to-instance mapping as shown on DSW2. DSW1 is in VTP client mode with a lower configuration revision number. DSW2 uses the VTP server mode to automatically propagate the MST configuration to DSW1. revision number. E. D. it automatically inherits MST configuration from DW2. B. Which statement is true? A. therefore. Configure DSW1 with the same version number.com 208 . Configure DSW1 with the same region name.braindumps.Cisco 300-115 Exam DSW1 should share the same MST region with switch DSW2. Answer: D Explanation: QUESTION NO: 178 www. C. DSW1 automatically inherits MST configuration from DSW2 because they have the same domain name. and VLAN-to-instance mapping as shown on DSW2.

D Explanation: QUESTION NO: 179 In a switch stack environment. E. The source port can be monitored in multiple SPAN sessions.com 209 . 32 Gbps C. C. 64 Gbps D.) A. 128 Gbps Answer: B Explanation: www. Answer: B.braindumps. The destination port can be destination in multiple SPAN sessions. You can mix individual source ports and source VLANs within a single session.Cisco 300-115 Exam Which two statements about SPAN source and destination ports during an active session are true? (Choose two. The destination port does not participate in STP. 16 Gbps B. D. what is the total bidirectional traffic flow between two logical counter-rotating paths? A. B. The source port can be only an Ethernet physical port.

braindumps.com 210 . D. C. Which statement about the SPAN and RSPAN configuration on SW1 is true? A. B. Answer: C Explanation: QUESTION NO: 181 Which information does the subordinate switch in a switch stack keep for all the VLANs that are configured on it? A. www.Cisco 300-115 Exam QUESTION NO: 180 Refer to the exhibit. SPAN session 2 only monitors egress traffic exiting port FastEthernet 0/14. RSPAN session 1 is incompletely configured for monitoring. SPAN session 2 monitors all traffic entering and exiting port FastEthernet 0/15. RSPAN session 1 monitors activity on VLAN 50 of a remote switch.

Layer 1 www.Cisco 300-115 Exam VLAN database B. spanning trees D.braindumps. 5000 bindings D. 8000 bindings Answer: D Explanation: QUESTION NO: 183 On which layer does IP source guard provide filtering to prevent a malicious host from impersonating the IP address of a legitimate host? A.com 211 . 1000 bindings B. routing information Answer: C Explanation: QUESTION NO: 182 Which option is the minimum number of bindings that the DHCP snooping database can store? A. DHCP snooping database C. 2000 bindings C.

one standby router.com 212 . learning Answer: A Explanation: QUESTION NO: 185 Which two statements about HSRP. HSRP is the preferred protocol to be used on multivendor environments. disabled B.) A. VRRP has one master router. GLBP. Layer 3 D. Layer 2 C. and many listening routers. Layer 7 Answer: B Explanation: QUESTION NO: 184 By default. on C. B. www.Cisco 300-115 Exam B. and VRRP are true? (Choose two. off D. what is the state of port security on a switch? A.braindumps.

com 213 . D. GLBP allows for a maximum of four MAC addresses per group. a hardware problem Answer: B www.1 D. Which option is the most likely explanation of the duplicate address message logged? A. VRRP is a Cisco proprietary protocol. E.1.braindumps. HSRP supports up to 255 groups on the same switch or router.D Explanation: QUESTION NO: 186 Refer to the exhibit. HSRP misconfiguration C.Cisco 300-115 Exam C. spanning-tree loop B. a PC with IP of 10.10. Answer: C.

Cisco 300-115 Exam Explanation: QUESTION NO: 187 DRAG DROP DRAG DROP Drag and drop the characteristic from the left to the matching Layer 2 protocol on the right. Answer: Explanation: www.com 214 .braindumps.

such as CDP and VTP.Cisco 300-115 Exam QUESTION NO: 188 Refer to the exhibit. The interface is administratively down. the switch control traffic. After applying the settings on the uplinks to the core switches. D. The standard configuration is used for each uplink. B. The encapsulation type is incorrect. The switchport mode trunk command should be first in the output. www. C. What is wrong with the configuration? A. A network engineer changes the default native VLAN to VLAN 999.braindumps.com 215 . is no longer working.

The priority value for VLAN 50 is set to 4094 on the root while the local switch priority is set to 32768.Cisco 300-115 Exam The native VLAN is not present on the trunk. The control traffic must be manually enabled on the new native VLAN.com 216 . The spanning-tree timers are reduced to improve the convergence time for VLAN 50. The engineer decides to force the secondary link to be the desired forwarding root port. A network engineer notices that there are issues with the physical cabling of the current root port.braindumps. E. Spanning tree determines the priority of the current root for VLAN 50 and reduces the priority of the local switch to a lower value. Answer: D Explanation: QUESTION NO: 189 Which two options are two results of using the command spanning-tree vlan 50 root primary within a spanning-tree network under global configuration? (Choose two.) A. All ports that are configured on the current switch with VLAN 50 transition to designated ports. Which action accomplishes this task? www. E. D. B. The switchport that is configured for VLAN 50 is the primary connection to the spanning-tree root switch. C.D Explanation: QUESTION NO: 190 An access switch at a remote location is connected to the spanning-tree root with redundant uplinks. Answer: A.

apply root guard to all outgoing neighbor interfaces D.Cisco 300-115 Exam A. enable MSTP and use a different revision number than all other switches Answer: A www.braindumps. Enable Rapid Spanning Tree to converge using the secondary link. D. Adjust the secondary link to have a lower priority than the primary link. What action will accomplish this task? A.com 217 . C. disable STP globally C. B. Answer: C Explanation: QUESTION NO: 191 A network engineer wants to make sure that an access switch will never become a Spanning Tree root for VLAN 5. Apply a BPDU filter on the primary interface of the remote switches. Change the link-type to point-to-point. adjust STP priority to the maximum value B.