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

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

braindumps.com 7 . switch1 channel-group 1 mode desirable switch2 channel-group 1 mode passive C. switch1 channel-group 1 mode on switch2 www.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.

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. This setting minimizes the transmission of PAgP packets. 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. but does not start LACP packet negotiation. in which the interface starts negotiations with other interfaces by sending PAgP packets. This setting minimizes the transmission of LACP packets.braindumps. auto Places an interface into a passive negotiating state. 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 responds to PAgP packets it receives but does not start PAgP packet negotiation. in which the interface responds to LACP packets that it receives. With the on mode. in which the interface starts negotiations with other interfaces by sending LACP packets. passive Places an interface into a passive negotiating state. on Forces the interface into an EtherChannel without PAgP or LACP.com 8 .

Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10. 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. Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible. Reference: http://www. www. For example: •An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode. •An interface in the auto mode can form an EtherChannel with another interface in the desirable mode.html QUESTION NO: 5 Refer to the exhibit.com 9 . 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. trunking state and VLAN numbers.braindumps. C. Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10. 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. B. for Layer 2 EtherChannels.Cisco 300-115 Exam determine if they can form an EtherChannel based on criteria such as interface speed and.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/121_13_ea1/configuration/guide/3550scg/swethchl.

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

) A.braindumps.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. A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination D. 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 remote SPAN VLAN on the distribution and access layer switch C. A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination B. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three. and destination ports on different switches (or different switch stacks). A monitor session on the distribution switch with a physical interface as the source and a physical interface as the destination Answer: B. source VLANs.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 monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination F. RSPAN supports source ports.C.com 11 . A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination E.

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

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

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

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

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

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

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

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

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

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

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

the default is 300 seconds. If a VLAN is not specified. the aging specification applies to all VLANs. The default timeout period will be 360 seconds.com 23 . This is how long a dynamic MAC address will remain in the CAM table. To configure the aging time for all MAC addresses. Entering the value 0 disables the MAC aging. 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. The MAC address-table will be flushed every 3 minutes.Cisco 300-115 Exam QUESTION NO: 19 What effect does the mac address-table aging-time 180 command have on the MAC addresstable? A.braindumps. D. perform this task: Command Purpose Step 1 switch# configure terminal Enters configuration mode. www. B. C. E. The range is from 0 to 1000000. 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. The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes. ARP requests will be processed less frequently by the switch.

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

B.braindumps. The SDM VLAN template causes the MAC address-table to overflow. Reference: http://www. The switch needs to be rebooted before the SDM template takes effect. The VLAN receives additional frames from neighboring switches. The SDM template is causing the CPU of the switch to spike during peak working hours. The VLAN template disables routing in hardware.cisco. We can configure the switch to automatically re-enable any error-disabled interfaces after a specified timeout period. 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 gives the offending issue a chance to be cleared by the user (for example.com 25 .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. by removing an unapproved device) without the need for administrative intervention. This is where errdisable autorecovery can be of great assistance. Reference: http://packetlife. What is the root cause of this issue? A.Cisco 300-115 Exam these can amount to a huge time sink for the administrative staff. D.html QUESTION NO: 22 www. C.com/c/en/us/support/docs/switches/catalyst-3750-seriesswitches/44921-swdatabase-3750ss-44921.

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

B.com 27 . The EtherChannels would form and function properly even though the load-balancing and EtherChannel modes do not match. The EtherChannels would form. but network loops would occur because the load-balancing methods do not match.Cisco 300-115 Exam What is the result of the configuration? A. D. C.braindumps. Answer: B Explanation: An etherchannel will form if one end is active and the other is passive. The EtherChannels would form and both devices would use the dst-ip load-balancing method because Switch1 is configured with EtherChannel mode active. The EtherChannels would not form because the load-balancing method must match on the devices. 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.

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

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

increasing operational efficiency. UDLD is enabled globally. VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE. In a VSS.com/article-cisco-catalyst-6500-series-vss-1440124536783. This port continues to reestablish until after eight failed retries. Answer: B Explanation: With UDLD aggressive mode enabled. when a port on a bidirectional link that has a UDLD www. 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. C.4 Tbps. B. Which option describes what causes the port to go into the errdisable state? A. and scaling system bandwidth capacity to 1. Normal UDLD operations that prevent traffic loops. UDLD port is configured in aggressive mode. UDLD timers are inconsistent. combining for an active 1400-Gbps switching capacity per VSS. Reference: http://ciscorouterswitch.com 30 . 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.html QUESTION NO: 26 After UDLD is implemented. Switches would operate as a single logical virtual switch called a virtual switching system 1440 (VSS1440). a Network Administrator noticed that one port stops receiving UDLD packets.over-blog.braindumps. D. boosting nonstop communications.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. The port then transitions into the errdisable state. Only one of the virtual switch members has the active control plane.

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

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

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

cisco. A network engineer investigates a recent network failure and notices that one of the interfaces on www.com 34 . Adjust the switch SDM back to “default”.braindumps. Reference: http://www. 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. or both source and destination addresses. Ensure that IP CEF is enabled globally to support all load balancing methods.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4.html QUESTION NO: 31 Refer to the exhibit. B. D. Configure the new load balancing method using port-channel load-balance. 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.Cisco 300-115 Exam A network engineer must set the load balance method on an existing port channel. Which action must be done to apply a new load balancing method? A. EtherChannel load balancing can use MAC addresses or IP addresses. The mode applies to all EtherChannels that are configured on the switch. source or destination addresses. Upgrade the PFC to support the latest load balancing methods. C.

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

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

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

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

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

com/en/US/docs/switches/lan/catalyst3560/software/release/12. C.Cisco 300-115 Exam •Support for extended range VLAN (VLANs 1006 to 4094) database propagation. Use VTP pruning on the trunk interfaces. VTP pruning is the best choice. the method runs the pruned VLAN on trunks. VTP versions 1 and 2 propagate only VLANs 1 to 1005. 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. B. you cannot convert from VTP version 3 to version 1 or 2.2_52_se/configur ation/guide/swvtp. VTPpruned VLANs on a trunk are still part of the spanning tree. Configure manual trunk pruning between the two locations.braindumps. Reference: http://www. • VTP pruning—Avoid this method if the goal is to reduce the number of STP instances. 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. D. Reference: http://www. and it avoids the use of the spanning tree. VTP-pruned VLANs do not reduce the number of spanning tree port instances. Therefore.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. Create a Layer 3 transit VLAN to segment the traffic between the sites.com 40 .cisco.cisco. Since the question asked for the choice that is an enhancement to the STP design.html#wp1316856 QUESTION NO: 38 A network engineer is extending a LAN segment between two geographically separated data centers. If extended VLANs are configured. Instead.shtml www.

B. ISL was unable to encapsulate more than the already permitted VLANs across the trunk. Reference: https://supportforums. After the command switchport trunk allowed vlan 10.com 41 .20.Cisco 300-115 Exam QUESTION NO: 39 The network manager has requested that several new VLANs (VLAN 10. The command effectively removed all other working VLANs and replaced them with the new VLANs.braindumps. C. 1000 B. and overwrite any others that were previously defined. Answer: A Explanation: The “switchport trunk allowed vlan” command will only allow the specified VLANs.com/document/11836/how-define-vlans-allowed-trunk-link QUESTION NO: 40 When you design a switched network using VTPv2. how many VLANs can be used to carry user traffic? A. all other existing VLANs no longer pass traffic over the trunk. Allowing additional VLANs across the trunk introduced a loop in the network.cisco. VTP pruning removed all unused VLANs. and 30) are allowed to traverse the switch trunk interface. 1001 www. What is the root cause of the problem? A. You would also need to explicitly allow the other working VLANs to this configuration command. 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. 20.30 is issued. D.

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

Cisco Discovery Protocol is not supported. so the open standard protocol must be configured. VTP pruning www.braindumps. principally wired Ethernet. NDP D.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.com 43 . Which protocol does the network engineer configure on both devices to accomplish this? A. LLDP performs functions similar to several proprietary protocols. Which option can be configured to accomplish this? A. capabilities. IRDP B. and neighbors on an IEEE 802 local area network. LLDP C. Reference: http://en. 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.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. allowed VLAN list B.wikipedia. such as the Cisco Discovery Protocol (CDP).

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

The port still participates in STP. So if the port is to be a part of the loop.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. switch# show spanning-tree brief D.braindumps.com 45 . switch# show spanning-tree summary E.com/library/content.informit. switch# show spanning-tree bridge C.24 Switch-C(config-if-range)# sp–nning-tree portfast Reference: http://www. enable the STP PortFast feature. switch# show spanning-tree vlan 10 brief Answer: A www. Example configuration: Switch-C# configure terminal Switch-C(config)# interface range fa0/3 . the port eventually transitions into STP blocking mode. PortFast immediately transitions the port into STP forwarding mode upon linkup. Spanning-Tree Fast Forward Answer: D Explanation: In order to allow immediate transition of the port into forwarding state. switch# show spanning-tree vlan 10 B.Cisco 300-115 Exam E.

html www.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2.232 P2p Reference: http://www.57d8.f2d2.9000 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio.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.--------------------------Po21 Root FWD 9 128.cisco.com 46 .--------.-------.braindumps.Cisco 300-115 Exam Explanation: Command Description show spanning-tree Displays information about the spanning-tree state.--. Example output: SW2#show spanning-tree vlan 10 VLAN0010 Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014.---.Nbr Type ------------------.216 P2p Po23 Altn BLK 9 128.

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

PVST+ E. 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.1w RST algorithm to multiple spanning trees. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies. RSTP B. MST. PVST C. Figure 3-15: VLAN Load Balancing www. Figure 3-15 shows a common network design.com 48 . 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. there are 1000 VLANs. MST D. connected to two Building Distribution submodule Switches D1 and D2.braindumps.Cisco 300-115 Exam A network engineer is setting up a new switched network. on the other hand. RPVST+ Answer: C Explanation: Multiple Spanning Tree (MST) extends the IEEE 802. featuring an access Switch A. uses a minimum number of STP instances to match the number of physical topologies present. 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.

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

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

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.braindumps. Reference: http://www.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. • VLANs—The VLAN template disables routing and supports the maximum number of unicast MAC addresses (clients). the switch SDM templates prioritize system resources to optimize support for certain features. routing Answer: A Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages. VLAN B. access D. • Default—The default template gives balance to all functions.com/en/US/docs/switches/lan/catalyst3560/software/release/12.com 51 . 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. It would typically be selected for a Layer 2 switch. default C.pdf QUESTION NO: 51 In a Cisco switch.cisco. • Routing—The routing template maximizes system resources for Ipv4 unicast routing. typically required for a router or aggregator in the center of a network.

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

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

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

cat6knative#show errdisable recovery ErrDisable Reason Timer Status ----------------. by default.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.Cisco 300-115 Exam order to manually reenable the ports.braindumps.-------------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.com 55 . The show errdisable recovery command shows the default error-disable recovery state for all the possible conditions. The errdisable recovery command allows you to choose the type of errors that automatically reenable the ports after a specified amount of time. the timeout feature is disabled. Reference: http://www.

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

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

This feature is implemented only for interfaces that support the IEEE 802. for example. Full/Half Duplex TLV Indicates status (duplex configuration) of CDP broadcast interface.html www. Port-ID TLV Identifies the port on which the CDP packet is sent. Native VLAN TLV Indicates. Platform TLV Describes the hardware platform name of the device. 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. the assumed VLAN for untagged packets on the interface. per interface. a switch. IP Network Prefix TLV Contains a list of network prefixes to which the sending device can forward IP packets. Capabilities TLV Describes the functional capability for the device in the form of a device type.cisco. for example. Version TLV Contains information about the software release version on which the device is running.braindumps. Used by network operators to diagnose connectivity problems between adjacent network elements. for example. Eth 1/0.1Q protocol. This information is in the form of the interface protocol and port number. 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. Cisco 4500. CDP learns the native VLAN for an interface. Reference: http://www. Used by network operators to verify VTP domain configuration in adjacent network nodes.com 58 .

LLDP cannot provide information about VTP. LLDP can discover only Windows servers. 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. B. LLDP can discover up to two devices per port. D. C.com 59 .braindumps.Cisco 300-115 Exam QUESTION NO: 58 Which option describes a limitation of LLDP? A. LLDP does not support TLVs.

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

braindumps. UDLD can operate in either normal or aggressive mode. and neighbors on a local area network. normal and passive E.cisco. capabilities. Reference: http://www. active and aggressive C. UDLD detects the existence of unidirectional links.2SX/configuration/guide/udld. UDLD puts the affected port into the errdisabled state and alerts the user. UDLD puts the affected port into the errdisabled state and alerts the user.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. normal and aggressive B. Answer: A Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support 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.com 61 .com/en/US/docs/switches/lan/catalyst6500/ios/12. When a unidirectional link is detected. normal and active D. www. UDLD detects the existence of unidirectional links. When a unidirectional link is detected.

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

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

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

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

VTP pruning B.orbit-computer-solutions. but VLAN 1 can’t be pruned because it’s an administrative VLAN. Both VTP versions 1 and 2 supports pruning. VLANs 1-1001 B.com/VTP-Pruning. Reference: http://www. all the clients in the VTP domain will automatically enable VTP pruning. VLANs 2-1001 D.braindumps.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. VLANs 2-4094 Answer: C Explanation: VTP pruning should only be enabled on VTP servers. VLANs 2 – 1001 are pruning eligible. VLANs 1-4094 C.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. storm control www. port-security C.com 69 . By default.

com/c/en/us/support/docs/lan-switching/vtp/1055821.1q.Cisco 300-115 Exam D. D. Update the VTP revision number.html#vtp_pruning QUESTION NO: 71 Refer to the exhibit.braindumps. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic. All switches in the network receive all broadcasts. Enable VTP pruning and disable 802.com 70 .1q.1q. B. Which action resolves this problem? A. Change VTP mode to server and enable 802. Reference: http://www. However. All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN.cisco. The users in an engineering department that connect to the same access switch cannot access the network. there are occasions when VTP can create unnecessary traffic. The network engineer found that the engineering VLAN is missing from the database. C. Disable VTP pruning and disable 802. bpdguard Answer: A Explanation: VTP ensures that all switches in the VTP domain are aware of all VLANs. even in situations in which few users are connected in that VLAN. Answer: C www.

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

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. Which Cisco IOS switching feature can be used to achieve the task? A. PPP encapsulation with a virtual template B. D. C. Inter-Switch Link Answer: C www. 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. B. Link Aggregation Protocol at the access layer C.braindumps. but users in company A are not able to access network resources in company B when DTP is enabled. Which action resolves this problem? A. 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. Delete vlan. Consider that this is a multivendor environment. The VTP domain names do match and they are both VTP servers so there are no issues there.com 72 . Manually force trunking with switchport mode trunk on both switches.Cisco 300-115 Exam required VLANs. dot1q VLAN trunking D. Enable the company B switch with the vtp mode server command.dat and ensure that the switch with lowest MAC address is the VTP server. Disable DTP and document the VTP domain mismatch.

www. There are 2 different methods for trunking. C. Answer: A Explanation: Cisco Discovery Protocol (CDP) version 2 passes native VLAN information between Cisco switches. only 802. but version 1 does not. If you have a native VLAN mismatch.braindumps.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol. Reference: http://www.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.1Q and ISL. QUESTION NO: 74 Which statement about using native VLANs to carry untagged frames is true? A. but version 2 does not.com 73 .ciscopress.com/articles/article. D. B. Cisco Discovery Protocol version 1 and version 2 carry native VLAN information. Cisco Discovery Protocol version 3 carries native VLAN information. Cisco Discovery Protocol version 1 carries native VLAN information. 802. Cisco Discovery Protocol version 2 carries native VLAN information. Of these. but versions 1 and 2 do not.asp?p=29803&seqNum=3 QUESTION NO: 75 Refer to the exhibit. you will see CDP error messages on the console output.

1q trunks are on both sides. not via DTP messages. If spanning tree detects a native VLAN mismatch. you must ensure that you choose a common native VLAN for each port in the trunk.Cisco 300-115 Exam A multilayer switch has been configured to send and receive encapsulated and tagged frames. B. 802. Native VLAN mismatches are detected via spanning tree and Cisco Discovery Protocol (CDP). spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on the trunk. the trunk still remains up for other VLANs. If you use 802. C.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.com/library/content. both with native VLAN mismatch. D.com 74 . Answer: C Explanation: Here we see that the native VLAN has been configured as 2013 on one switch. VLAN ID 1 should not be used for management traffic because it’s unsafe. Which option is the cause of the spanning-tree error? A.braindumps. 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. www. VLAN spanning-tree in SW-2 is configured. Reference: http://www.1Q trunks. Which Cisco IOS feature can be used to achieve this task? A.informit. VLAN 2013 on the multilayer switch is configured as the native VLAN. but 1 (the default native VLAN) on the other switch. spanning-tree bpdu-filter is enabled. however.

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

Cisco 300-115 Exam remove” command. www.cisco. The “trunk pruning vlan 1” option is not a valid command.1q Q-in-Q encapsulation? A. Support 1522 layer 3 IP and IPX packet D. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning. Support less than 1500 MTU B. 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. Because the 802.html QUESTION NO: 79 Refer to the exhibit.com 76 . Reference: http://www.1_13_ea1/config uration/guide/swtunnel. Support 1504 MTU or higher C. QUESTION NO: 78 What is required for a LAN switch to support 802.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1Q tunneling (Q-in-Q) feature increases the frame size by 4 bytes when the extra tag is added. Support 1547 MTU only Answer: B Explanation: The default system MTU for traffic on Catalyst switches is 1500 bytes.braindumps.

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

Reference: http://www.com/c/en/us/td/docs/ios/12_2sb/feature/guide/gigeth. The PagP modes are explained below.braindumps. The higher the number. desirabledesirable. Answer: A Explanation: PagP modes are off. Only the combinations auto-desirable.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.Cisco 300-115 Exam Answer: B Explanation: A LACP port priority is configured on each port using LACP. desirable. and on. active. The default is 32768. the lower the priority. and on. and on. desirabledesirable. and on. LACP uses the port priority with the port number to form the port identifier. desirable. Only the combinations active-active. and on-on allow the formation of a channel. and on-on allow the formation of a channel. auto. 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. The port priority can be configured automatically or through the CLI. C. and on-on will allow a channel to be formed. and on. and on-on allow the formation of a channel. and on-on allow the formation of a channel. Only the combinations active-desirable. desirabledesirable. Only the combinations auto-desirable. D. desirable. desirable. desirabledesirable. The valid range is from 1 to 65535.com 78 . and on-on will allow a channel to be www. desirabledesirable. Only the combinations of auto-desirable. PagP modes are active. desirable-desirable.cisco. PagP modes are off. desirable. PagP modes are off. B. auto. Only the combinations auto-auto. PagP modes are active.

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

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

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

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

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.cisco.html QUESTION NO: 86 Refer to the exhibit.com 83 . Each EtherChannel can consist of up to eight compatibly configured Ethernet interfaces. Fa0/14.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. Physical port Fa0/13. All interfaces in each EtherChannel must be the same speed. www. 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. Which statement about switch S1 is true? A. and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol.braindumps. and all must be configured as either Layer 2 or Layer 3 interfaces.

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

cisco.braindumps. if the RSTP switch is using 802.1D BPDU after the port migration-delay timer has expired. in which all the spanning tree instances are independent. what is the total number of spanning-tree instances running on the switch? A. RSTP selectively sends 802. 1 B.Cisco 300-115 Exam Answer: A Explanation: For backward compatibility with 802. and CST spanning trees: •An IST is the spanning tree that runs in an MST region.1D switch and starts using only 802.1D switches. 4 Answer: C Explanation: Unlike other spanning tree protocols. CIST.1D configuration BPDUs and TCN BPDUs on a per-port basis.1D BPDUs.html QUESTION NO: 88 When two MST instances (MST 1 and MST 2) are created on a switch. the migrate-delay timer is started (specifies the minimum time during which RSTP BPDUs are sent). www. However. While this timer is active. it restarts the timer and starts using RSTP BPDUs on that port. If the switch receives an 802. MST establishes and maintains IST.com 85 . the switch processes all BPDUs received on that port and ignores the protocol type. When a port is initialized. and RSTP BPDUs are sent.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/spantree. 3 D. it assumes that it is connected to an 802. Reference: http://www.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired. 2 C.

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

Cisco 300-115 Exam f1/0 and f1/1 have the same end-to-end path cost to the designated bridge. STP considers port priority when selecting a LAN port to put into the forwarding state. Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0. 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. Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16. D. Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0. C. If all LAN ports have the same www.com 87 . B. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16.braindumps. Answer: C Explanation: If a loop occurs. 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.

www.braindumps.com/en/US/docs/switches/lan/catalyst2950/software/release/12. Why would the switch be considered as a root bridge? A. A lower path cost represents higher-speed transmission and is preferred.com 88 .cisco. The possible priority range is 0 through 240 (default 128). The bridge priority is 1 and all ports are forwarding. STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports.html#wp1105354 QUESTION NO: 90 Refer to the exhibit. Reference: http://www.Cisco 300-115 Exam priority value. configurable in increments of 16.1_9_ea1/configur ation/guide/swstp.

html#wp1020666 QUESTION NO: 91 Refer to the exhibit.braindumps. the default is 32768. All ports are members of VLAN 10. it has the lowest priority value for VLAN 1.com 89 . the range is 0 to 61440 in increments of 4096. D. Considering the default cost of upstream bridges to the root www. Reference: http://www.com/en/US/docs/switches/lan/catalyst2950/software/release/12.cisco. Answer: D Explanation: For priority.1_9_ea1/configur ation/guide/swstp. the more likely the switch will be chosen as the root switch. The lower the number.Cisco 300-115 Exam B. The bridge priority is 128.19 and all ports are forwarding. C. The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”. The switch priority value is zero.

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

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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braindumps. and only the new active virtual switch continues to forward traffic. D.html QUESTION NO: 98 Which statement describes what happens when a switch enters dual active recovery mode? A.cisco. www. The VSS transitions to the dual active recovery mode. the VSS will transition to the dual active recovery mode. Answer: D Explanation: Q. The virtual switch members reload. Reference: http://www. If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b .2(33)SXI) In the dual active recovery mode. 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. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member.com 95 . The new active virtual switch continues to forward traffic on all links. The switch shuts down and waits for the VSL link to be restored before sending traffic.Cisco 300-115 Exam C. B. What happens if all VSL connections between the virtual switch members are lost? A. 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.

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

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. Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. 21. This mode should be done with a nonproprietary protocol.braindumps. with SwitchA controlling activation. 22 and 23 should tagged when traversing the trunk link.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.com 97 . www.

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

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 .

braindumps.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 .

13” SW-A(config)#spanning-tree vlan 11-13.1 ! end Solution SW-A (close to router) Note: If Sw-A does not have Vlan 11.1. 12.com 101 .168.braindumps.12.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 192.21-23 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. 13 we have to create them first with command “SWA(config)#vlan 11.

com 102 . 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.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.braindumps.21-23 SW-A(config-if)#no shut Note: When you apply commands under “interface port-channel 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.

1.braindumps.com 103 .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 192.168.1 (you can get this IP from SW-A with command show cdp neighbour detail) SW-B(config)#interface vlan 1 www.

Cisco 300-115 Exam SW-B(config-if)#ip address 192.11 255.21-23 SW-B(config-if)#no shut Note: For Sw-B we have to set the 802.21-23 root primary Configuration Requirements for SwitchB – Vlan 21. 13. 12. 21. 22 and 23. will support two servers attached to fa0/9 and fa0/10 – Vlan 22.255.0 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.braindumps.1Q and we have to explicitly set which trunking protocol to be used. Name: Marketing. – 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 11-13.1q 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 802.168. will support two servers attached to fa0/13 and fa0/14 www. Name: Sales.com 104 .1Q is the only supported trunking protocol) so we can apply “switchport mode trunk” directly.255. ——————————————————— Some guidelines for configuring SwitchA & SwitchB: Configuration Requirements for SwitchA – The VTP and STP configuration modes on SwitchA should not be modified.1. Sw-A is a 2900x series (or lower) switch and does not support ISL trunking protocol (802.

Cisco 300-115 Exam – Vlan 23. This mode should be done with a nonproprietary protocol. 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.11/24.com 105 . 21. with SwitchA controlling activation. interface vlan 1 ip address 192. 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. vtp mode transparent – SwitchB must operate in the same spanning tree mode as SwitchA. 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.braindumps.168. 22 and 23 should tagged when traversing the trunk link.1. 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.168. – 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. spanning-tree mode rapid-pvst – No routing is to be configured on SwitchB.0 Inter-switch Connectivity Configuration Requirements: – For operational and security reasons trunking should be unconditional and Vlans 1.255.11 255.255.1. Name: Engineering. – Only the SVI vlan 1 is to be configured and it is to use address 192.

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.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. SW-A(config)#interface port-channel 1 SW-A(config-if)#switchport trunk allowed vlan 1.braindumps. 21.21-23 ————————————— SW-B(config)#interface port-channel 1 www.

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

Routing must only be enabled for the specific subnets shown in the diagram.250. SwitchC uses Cisco as the enable password.250.Cisco 300-115 Exam – 10.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway.32/27 – 190.10.200.com 108 . All routes must be learned via the EIGRP routing protocol.10. changes VLAN port assignments or create trunks. Company policies forbid the use of static or default routing. www.0/24 – 190.200.braindumps. Note: Due to administrative restrictions and requirements you should not add or delete VLANs.

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

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.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.33 Host2: + Default gateway: 190.250.braindumps. SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router). Click on H1 and H2 and type the “ipconfig” command to get their default gateways. We should check the default gateways on H1 & H2. Trunking must be established between RouterC and SwitchC. gi0/11 interfaces were configured as access www.250. 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. No trunking requires. + Only use SwitchC for interVLAN routing without using RouterC.200.com 110 . Answer: \>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190.200.

so you will not miss within it in the exam. If you use wrong AS number.200.255.33 255. In order to complete the lab.0.200.250. 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.10.0.0. www.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED. also don’t modify/delete any port just do the above configuration.0 ->RouterC has used IP 10.200.255.255.10.0.250.250.64 0. you should expect the ping to SERVER to succeed from the MLS.10.31 SwitchC(config-router)# network 190.Cisco 300-115 Exam ports so we don’t need to configure them in this sim.2 255.10.braindumps.1 so this is the lowest usable IP address. the simulator does not let you assign IP address on Gi0/1 interface.0.255 SwitchC(config-router)# network 190.com 111 .32 0.10.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.255.255.224 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 10.0 0.200.65 255. and from the PCs as well. in fact it is not necessary because the network 190. no neighbor relationship is formed between RouterC and SwitchC. SwitchC(config-if)# ip address 10.250.0.255.0. Also some reports said the “no auto-summary” command can’t be used in the simulator.10. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.200.0/16 is not used anywhere else in this topology.

31 and “network 190.200.31 we can use one simple command “network 190.0. even without “no auto-summary” command the network still works correctly.0. QUESTION NO: 101 You have been asked to install and configure a new switch in a customer network.Cisco 300-115 Exam In fact. But in the exam the sim is just a flash based simulator so we should use two above commands. Use the console access to the existing and new switches to configure and verify correct device configuration.250. we can use “show run” command to verify. But after finishing the configuration.200.0. www.0 is shown. we are pretty sure instead of using two commands “network 190. only the summarized network 190.64 0.0.0 because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised.com 112 .braindumps.32 0. just for sure.0.200.0.200.250.

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

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

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

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

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

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

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

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

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

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

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

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

braindumps. 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.com 125 .

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

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

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

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

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

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

Private VLANs are configured in the context of a single switch and cannot have members on other switches. and its associated VLAN number.com/articles/article. B. The switch uses the IP source binding table only wIen IP source guard is enabled. 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 packets originating from the workstation are assumed to be spoofed and will be discarded. Enable VTP version 3. An entry in this table has an IP address.braindumps. Private VLANs also carry TLVs that are not known to all types of Cisco switches.com 132 . Traffic will pass accordingly after the new IP address is populated into the binding database. its associated MAC address. or with source IP and MAC www.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.ciscopress. The IP address of one of the workstations does not match any entries found in the DHCP binding database.Cisco 300-115 Exam C. Answer: C Explanation: You must configure VTP to transparent mode before you can create a private VLAN. Packets from the workstation will be rate limited according to the default values set on the switch. Which statement describes the outcome of this scenario? A. The interface that is connected to the workstation in question will be put into the errdisabled state. D. You can configure IP source guard with source IP address filtering. C. Reference: http://www. Configure VTP Transparent Mode. D.

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

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

Only broadcast traffic is limited by this particular storm control configuration. B.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/122_25_see/configuration/guide/3550SCG/swdhcp82. E. Answer: C. specify the rising threshold level for broadcast. or unicast traffic as a percentage (up to two decimal places) of the bandwidth. The keywords have these meanings: •For level.F Explanation: storm-control {broadcast | multicast | unicast} level {level [level-low] | pps pps [pps-low]} Configure broadcast. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. multicast. www. The range is 0. F. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth.00.braindumps. or unicast storm control. C. The switch drops broadcasts when they reach 75% of bandwidth. multicast. storm control is disabled. Reference: http://www.Cisco 300-115 Exam can configure IP source guard with source IP address filtering or with source IP and MAC address filtering.cisco. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth. The switch resumes forwarding broadcasts when they are below 65% of bandwidth.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.D.) A. In which three ways does this command impact the traffic? (Choose three. By default.com 135 . The port blocks traffic when the rising threshold is reached.00 to 100. D.

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

pdf QUESTION NO: 115 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server. including the switch port that the particular host is using. switch# show port-security C.com/c/en/us/td/docs/switches/lan/catalyst4500/122/53SG/configuration/config/port_sec. switch# show mac address-table B.Cisco 300-115 Exam Reference: http://www.com 137 . switch# show ip verify source D. 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.E Explanation: These two commands will show the MAC address table. Which two commands help trace this PC when the MAC address is known? (Choose two. switch# show ip arp inspection E.) A.cisco.braindumps. switch# show mac address-table address <mac address> Answer: A.

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

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

braindumps.cisco. you are defining a particular list of authorization methods for the indicated authorization type. Method lists enable you to designate one or more security protocols to be used for authorization. Reference: http://www.Cisco 300-115 Exam C. the Cisco IOS software selects the next method listed in the method list.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathor. For detailed information on the authentication proxy feature. in sequence. Method lists are specific to the authorization type requested: •Auth-proxy—Applies specific security policies on a per-user basis. Command authorization attempts authorization for all EXEC mode commands. SLIP. When you create a named method list. 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. including global configuration commands. This process continues until there is successful communication with a listed authorization method. or all methods defined are exhausted. Cisco IOS software uses the first method listed to authorize users for specific network services. associated with a specific privilege level. EXEC D.com 140 . if that method fails to respond. or ARAP connection. •Network—Applies to network connections. •EXEC—Applies to the attributes associated with a user EXEC terminal session.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+). thus ensuring a backup system in case the initial method fails. This can include a PPP. 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. •Reverse Access—Applies to reverse Telnet sessions.

TACACS+ C. the authentication service is transparent to the client.Cisco 300-115 Exam Which authentication service is needed to configure 802.braindumps.1x. the authentication server—performs the actual authentication of the client.cisco. 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.com 141 . The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server.pdf QUESTION NO: 120 Refer to the exhibit. www. RADIUS with CoA D.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/121_19_ea1/configuration/guide/2940scg_1/sw8021x. RADIUS with EAP Extension B. RADIUS using VSA Answer: A Explanation: With 802. Reference: http://www. Because the switch acts as the proxy.1x? A.

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

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.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/PrivateVLANs. and the traffic from each isolated port also remains completely separate. •Isolated VLAN —An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. www. promiscuous VLAN Answer: A Explanation: Understanding Primary. community VLAN D.Cisco 300-115 Exam port is completely isolated from all other ports in the isolated VLAN. and to other promiscuous ports.braindumps. primary VLAN C.cisco. Isolated. Reference: http://www. all the traffic remains isolated within each one.com 147 . You can configure multiple isolated VLANs in a private VLAN domain. Each isolated VLAN can have several isolated ports.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. Community ports communicate with other ports in the same community VLAN and with associated promiscuous ports. These interfaces are isolated from all other interfaces in other communities and from all isolated ports within the private VLAN domain. •Community—A community port is a host port that belongs to a community secondary VLAN. isolated VLAN B.

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. Reference: http://www. It may also contain static entries www. The ports within one community can communicate.braindumps.com 148 .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.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. dynamic ARP database C. DHCP snooping database B.cisco. dynamic routing database D. but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN. This database is built by DHCP snooping when it is enabled on the VLANs and on the device. DAI can determine the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a DHCP snooping binding database. 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/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/PrivateVLANs. • Drops invalid ARP packets.

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

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

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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Filtering should be implemented as close to the server farm as possible.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches.braindumps.40. 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.120. Reference: http://en. Packets from devices in the subnet of 172. isolated port C.120. Devices on VLAN 20 are restricted to the subnet of 172. Authentication is to be done via a Radius server: Radius server host: 172.0/24 should be allowed on VLAN 20. access port Answer: A Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. Corporate polices do not allow layer 3 functionality to be enabled on the switches. Packets from devices in any other address range should be dropped on VLAN 20.46 Radius key: rad123 Authentication should be implemented as close to the host as possible.org/wiki/Private_VLAN QUESTION NO: 136 CORRECT TEXT SIMULATION SWITCH. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port). VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.wikipedia. www. DSW1 and ASW1.40. community port D.120.40.Cisco 300-115 Exam promiscuous port B. For security reasons. The topology diagram indicates their layer 2 mapping.com 155 .0/24.

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

40.120.com 157 .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 0.0.0.120.39.255 DSW1(config-ext-nacl)#exit DSW1(config)#vlan access-map PASS 10 DSW1(config-access-map)#match ip address 10 www.braindumps.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.

the hot standby priority on the device on which tracking has been configured decreases by 10. If an interface is not tracked. its state changes do not affect the hot standby priority of the configured device.com 158 . 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. standby priority C. For each interface configured for hot standby. When a tracked interface fails.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. you can configure a separate list of interfaces to be tracked.braindumps. backup interface D. Infrastructure Services QUESTION NO: 137 Which configuration command ties the router hot standby priority to the availability of its interfaces? A. Reference: www. standby group B.

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

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

1 AVG (Active Virtual Gateway). .1 or more backup routers.. .Use virtual ip address.1 active router. .Cisco 300-115 Exam VRRP D..Use virtual ip address. if not...1 standby router.up to 1024 virtual routers (GLBP groups) per physical interface. 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 . Scope Cisco proprietary IEEE standard Cisco proprietary Election Active Router:1-Highest Priority2-Highest IP (tiebreaker) www. .com 161 .Can use real router ip address..braindumps.up to 4 AVF routers on the group (Active Virtual Forwarder) passing traffic. the one with highest priority become master.1 master router.1 or more listening routers. .

102-udp 1985 (version2) 224.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 224.0.0.0.0.18 – IP 112 224.0.102 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.braindumps.0.0.com 162 .2 – udp 1985 (version1)224.

Round-Robin algorithm (default). 10 D. 5 C.Multiple HSRP group per interface/SVI/routed int. Load-balancing oriented.com 163 .Weighted algorithm.Host-dependent algorithm.(generally through DHCP) Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing. Reference: http://cciethebeginning.braindumps. 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. 1 B. . www.. .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.Cisco 300-115 Exam Load-balancing functionality . Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing.wordpress.Multiple VRRP group per interface/SVI/routed int.(generally through DHCP) Clients are transparently updated with virtual MAC according to load-balancing algorithm through ARP requesting a unique virtual gateway.

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

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

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

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

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

Incorrect GLBP IP address C. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224.0. If the MAC address of the interface is the same as the one reported in the error message. If the interface MAC address is different from the one reported in the error message.0.cisco. issue the show interface command to verify the MAC address of the interface.com 169 . HSRP configured on same interface as GLBP D. When configuring the multicast boundary command.255. permit the Multicast address by permit 224. Verify the spanning-tree topology and check if there is any layer2 loop.0 15. Reference: http://www. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues. then some other device with a MAC address reports this error message.0.braindumps. Layer 2 loop Answer: D Explanation: This section provides information you can use to troubleshoot your configuration. then it indicates that this router is receiving its own hello packets sent.Cisco 300-115 Exam Which option describes the reason for this message in a GLBP configuration? A.255.com/en/US/products/hw/switches/ps708/products_configuration_example09186a 00807d2520.shtml#dr www.102 and User Datagram Protocol (UDP) port 3222 (source and destination). In order to resolve this issue.0. Unavailable GLBP active forwarder B.255.

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

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

you have been asked to investigate and respond to the following question. unless GigabitEthernet1/0/1 on backup device has also failed. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.Cisco 300-115 Exam priority value configured in the VLAN 101 HSRP group on DSW2. • 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. with an enterprise network (access. Inc. The distribution switches are configured to use HSRP to provide a high availability solution. Currently all interfaces are up. Using the running configurations and show commands.com 172 . Troubleshooting has identified several issues. www. Answer: A Explanation: QUESTION NO: 149 Ferris Plastics. 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. D.braindumps. is a medium sized company.

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

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

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

what can be done to make the group function properly? A.braindumps. On DSW2. B.com 176 . On DSW1. As related to the VLAN 103 HSRP group. www. disable preempt. 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. D. C.Cisco 300-115 Exam All interfaces are active. On DSW1. decrease the priority value to a value less than 190 and greater than 150.

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

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

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

you have been asked to investigate and respond to the following question. QUESTION NO: 152 Ferris Plastics. Result is priority 144 < 145 (vlan104 on DS2 is active).braindumps. Troubleshooting has identified several issues.com 180 . Using the running configurations and show commands. Inc. is a medium sized company. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.Cisco 300-115 Exam 6 = 144. The distribution switches are configured to use HSRP to provide a high availability solution. www. with an enterprise network (access. 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. Currently all interfaces are up.

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

• DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 • D–W2 . Inc. Troubleshooting has identified several issues. www. QUESTION NO: 153 Ferris Plastics. with an enterprise network (access.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. Currently all interfaces are up.braindumps. Using the running configurations and show commands. Very easy to see that the priority of Vlan105 is 150. unless GigabitEthernet1/0/1 on backup device has also failed.com 182 . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. is a medium sized company. 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.Cisco 300-115 Exam Answer: C Explanation: Use "show standby brief" command on console2.

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

150 D. www.Cisco 300-115 Exam If GigabitEthemet1/0/1 on DSW2 is shutdown. 100 C.com 184 .braindumps. 90 B. 200 Answer: A Explanation: Explanation As seen below. 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. what will be the resulting priority value of the VLAN 105 HSRP group on router DSW2? A. the current priority for VLAN 105 is 100.

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 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.com 185 . www. 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.com 186 .16.10. R1-0% B. R2-100% www. R2-50% C.braindumps.0/24 subnet is being forwarded through R1? A. R1-50 %.

so all outgoing traffic will be forwarded to R1. They have questions about how these two devices will perform in the event of a device failure. R1-100% Answer: D Explanation: Based on the following output. 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. www. we see that R1 is the active standby router for the Ethernet 0/0 link.com 187 . Click on the devices or the tabs at the bottom of the screens to access the CLI to answer their questions.braindumps.Cisco 300-115 Exam D.

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

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

braindumps. when the Ethernet 0/0 interface goes down. it will then increment it by 40 back to 130 for HSRP group 1. Click on the devices or the tabs at the bottom of the screens to access the CLI to answer their questions. www. They have questions about how these two devices will perform in the event of a device failure.Cisco 300-115 Exam Here. 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. the standby 1 track decrement command will lower the priority from 130 to 90. However. when it comes back up.com 190 .

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

we see that authentication is configured on R2. The HSRP group authentication is misconfigured C.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. but not on R1: www.braindumps. The HSRP Hello packets are blocked D. The HSRP group number mismatch B.com 192 . The HSRP group priorities are different Answer: B Explanation: Based on the configuration output. The HSRP timers mismatch E.

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. www.com 193 . Click on the devices or the tabs at the bottom of the screens to access the CLI to answer their questions.braindumps.

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

0000. 0000.0010 as shown below: www.0000. 0000.0000.0c07.0c07. 0000.ac02 B.braindumps.0c07. 4000.0010 Answer: B Explanation: Issuing the “show standby” command on either router shows us that the virtual MAC used by HSRP group 1 is 4000.Cisco 300-115 Exam What is the virtual mac-address of HSRP group 1? A. 4000.0010 C.ac01 D.0000.ac02 F.ac01 E. 4000.com 195 .

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

LACP port priority C. port number F. spanning-tree bpduguard default C. interface bandwidth Answer: A.) A.com 197 . hot-standby link identification number G.B.Cisco 300-115 Exam B. system ID E. LACP system priority B.braindumps. 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.D. spanning-tree portfast bpdufilter default D.E Explanation: QUESTION NO: 160 www. interface MAC address D.

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

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

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

A sticky MAC address can be a unicast or multicast address. C. A sticky MAC address is lost when the switch reboots. www. 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. D. B. 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. BackboneFast C.braindumps.com 201 . write memory D. A sticky MAC address is retained when the switch reboots.Cisco 300-115 Exam C. BPDU filtering B. A sticky MAC address ages out of the MAC address table after 600 seconds.

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

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

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

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

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

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

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

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

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

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. 2000 bindings C.Cisco 300-115 Exam VLAN database 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.braindumps.com 211 . spanning trees D. DHCP snooping database C. Layer 1 www. 1000 bindings B.

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

VRRP is a Cisco proprietary protocol. Which option is the most likely explanation of the duplicate address message logged? A. spanning-tree loop B.10.1.braindumps. GLBP allows for a maximum of four MAC addresses per group.D Explanation: QUESTION NO: 186 Refer to the exhibit. D. Answer: C.com 213 . E.Cisco 300-115 Exam C. HSRP misconfiguration C. a PC with IP of 10.1 D. a hardware problem Answer: B www. HSRP supports up to 255 groups on the same switch or router.

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.

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

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

apply root guard to all outgoing neighbor interfaces D. Adjust the secondary link to have a lower priority than the primary link. C. Apply a BPDU filter on the primary interface of the remote switches. disable STP globally C. Enable Rapid Spanning Tree to converge using the secondary link.Cisco 300-115 Exam A. enable MSTP and use a different revision number than all other switches Answer: A www. Change the link-type to point-to-point.braindumps. D.com 217 . adjust STP priority to the maximum value 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. What action will accomplish this task? A. B.