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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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cisco. 75 E. but the switch types do not match: 1.Cisco 300-115 Exam The provisioned configuration is changed to reflect the new information. The switch type of the provisioned switch does not match the switch type in the provisioned configuration on the stack. If the stack member number of the provisioned switch matches the stack member number in the provisioned configuration on the stack. 25 C.html QUESTION NO: 3 What percentage of bandwidth is reduced when a stack cable is broken? A. Reference: http://www. 50 D. 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.com 5 . 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. but 2. The stack member number of the provisioned switch is not found in the provisioned configuration. 100 www. The stack member numbers match.braindumps.

Figure 3.com 6 .Cisco 300-115 Exam Answer: C Explanation: Physical Sequential Linkage The switches are physically connected sequentially.html QUESTION NO: 4 Refer to the exhibit.cisco. 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. Subsecond timing mechanisms detect traffic problems and immediately institute failover.braindumps.com/c/en/us/products/collateral/switches/catalyst-3750-seriesswitches/prod_white_paper09186a00801b096a. This mechanism restores dual path flow when the timing mechanisms detect renewed activity on the cable. www. as shown in Figure 3.

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

on Forces the interface into an EtherChannel without PAgP or LACP. passive 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. This setting minimizes the transmission of PAgP packets. in which the interface responds to PAgP packets it receives but does not start PAgP packet negotiation. auto Places an interface into a passive negotiating state. in which the interface responds to LACP packets that it receives. 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. Both the auto and desirable PAgP modes allow interfaces to negotiate with partner interfaces to www.Cisco 300-115 Exam channel-group 1 mode auto D. but does not start LACP packet negotiation. With the on mode. in which the interface starts negotiations with other interfaces by sending LACP packets.com 8 . This setting minimizes the transmission of LACP packets. in which the interface starts negotiations with other interfaces by sending PAgP packets. desirable Places an interface into an active negotiating state.braindumps.

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

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

) A. A monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination F. source VLANs.com 11 . Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three. enabling remote monitoring of multiple switches across your network. and destination ports on different switches (or different switch stacks). SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a destination port for analysis. RSPAN supports source ports.C. A monitor session on the distribution switch with a physical interface as the source and a physical interface as the destination Answer: B. A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination E.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. The www. A remote SPAN VLAN on the distribution and access layer switch C.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. A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination B. A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination D.braindumps.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

D. The EtherChannels would form. C. but network loops would occur because the load-balancing methods do not match.braindumps. The EtherChannels would form and function properly even though the load-balancing and EtherChannel modes do not match.Cisco 300-115 Exam What is the result of the configuration? A.com 27 . 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. B. 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. The EtherChannels would not form because the load-balancing method must match on the devices.

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

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

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

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

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

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

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

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

transparent bridging C. Cisco Discovery Protocol source interface E.com/CiscoSB/GetArticle. This is the default version on all switches.Cisco 300-115 Exam D. trunk allowed VLANs D. This version is mainly used for backward compatibility. Cisco Discovery Protocol logging options Answer: A Explanation: • CDP Version 1 — This is the first version of CDP which was used for the discovery of Cisco devices in the network.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.cisco. • CDP Version 2 — This is the most recent version of CDP which has enhanced features such as rapid reporting mechanism. L2P tunneling Answer: C Explanation: www.com 36 .aspx?docid=0ed03cbac49b446ab390a657917d817c_Ci sco_Discovery_Protocol_CDP__Properties_Settings_on_Sx500_S.braindumps. VTP pruning B. which is used to track down errors and minimize costly downtime. Reference: http://sbkb. VLAN access-list E.

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

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

E. You must reenter the password if you enter a takeover command in the domain. the secret key from the password string is saved in the VLAN database file. What is the problem? A. C. B. the key associated with the password is saved in hexadecimal format in the running configuration. When you enter the secret keyword.Cisco 300-115 Exam C. but it does not appear in plain text in the configuration. Another switch in the domain has a higher revision number than the server. you can directly configure the password secret key. VTP must be stopped and restarted on the server. QUESTION NO: 37 After configuring new data VLANs 1020 through 1030 on the VTP server. The VTP version number must be set to version 3.braindumps. The first thing that should be done is to verify that the trunk ports are connected and up. The VTP server must be reloaded. www. After each update to the VTP server. When hidden. Reload the VTP server.com 39 . 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. Instead. a network engineer notices that none of the VTP clients are receiving the updates. D. it takes up to 4 hours propagate. D. Verify connected trunk ports.

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

ISL was unable to encapsulate more than the already permitted VLANs across the trunk.braindumps. B.com/document/11836/how-define-vlans-allowed-trunk-link QUESTION NO: 40 When you design a switched network using VTPv2.Cisco 300-115 Exam QUESTION NO: 39 The network manager has requested that several new VLANs (VLAN 10.30 is issued. The command effectively removed all other working VLANs and replaced them with the new VLANs. After the command switchport trunk allowed vlan 10. You would also need to explicitly allow the other working VLANs to this configuration command.com 41 . how many VLANs can be used to carry user traffic? A. 20. and overwrite any others that were previously defined. Answer: A Explanation: The “switchport trunk allowed vlan” command will only allow the specified VLANs. What is the root cause of the problem? A.cisco. VTP pruning removed all unused VLANs. 1001 www. and 30) are allowed to traverse the switch trunk interface. D. C. Reference: https://supportforums. all other existing VLANs no longer pass traffic over the trunk. Allowing additional VLANs across the trunk introduced a loop in the network. 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. 1000 B.

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

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

VLAN traffic can be removed from the allowed list. For their disaster recovery feature to operate successfully. This removes specific VLANs from the allowed list. L2P tunneling Answer: A Explanation: When a trunk link is established. Which spanning-tree feature satisfies this requirement? A. This keeps traffic from the VLANs from passing over the trunk link.braindumps. VLANs 1 through 1005 are allowed on each trunk by default. To restrict the traffic that a trunk carries. For Integrated Cisco IOS Software based switches. Spanning-Tree FastPort D. However. 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 PortFast www. Reference: https://supportforums. Note: The allowed VLAN list on both the ends of the trunk link should be the same. all of the configured VLANs are allowed to send and receive traffic across the link.com 44 . they require the switchport to enter a forwarding state immediately. Spanning-Tree Timers C.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. VACL D. Rapid Spanning-Tree B. perform these steps: 1.cisco.Cisco 300-115 Exam C.

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

--.html www.---.com 46 .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.f2d2.--------------------------Po21 Root FWD 9 128.57d8.cisco.-------.braindumps.--------.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2.Cisco 300-115 Exam Explanation: Command Description show spanning-tree Displays information about the spanning-tree state.Nbr Type ------------------.216 P2p Po23 Altn BLK 9 128. Example output: SW2#show spanning-tree vlan 10 VLAN0010 Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014.232 P2p Reference: http://www.9000 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio.

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

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

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

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

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

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

D. More than 64 MAC addresses are added to the content-addressable memory. use the mac-address-table notification mac-move command in global configuration mode. Usage Guidelines MAC-move notification generates a syslog message whenever a MAC address or host moves between different switch ports. C.com 53 . A new MAC address is removed from the content-addressable memory. To disable MAC-move notification. 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. A new MAC address is added to the content-addressable memory. Reference: http://www.cisco. use the no form of this command.html QUESTION NO: 53 Which option is a possible cause for an errdisabled interface? www.braindumps.Cisco 300-115 Exam A.

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

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

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

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

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

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

and neighbors on a local area network. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures.cisco.com 60 . UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to advertise their identity.html QUESTION NO: 59 Which statement about the UDLD protocol is true? A.com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd804cd4 6d. capabilities. 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. B.Cisco 300-115 Exam External Port-ID TLV VTP management support No VTP Management Domain TLV Port unidirectional mode-Used in fiber. www. C.braindumps. D. 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 UDLD is a standardized Layer 2 protocol that enables devices to advertise their identity. Reference: http://www. normal and active D. normal and passive E. When a unidirectional link is detected.ht ml QUESTION NO: 60 Which option lists the modes that are available for configuring UDLD on a Cisco switch? A. www. and neighbors on a local area network.braindumps. UDLD detects the existence of unidirectional links. UDLD can operate in either normal or aggressive mode. When a unidirectional link is detected. normal and aggressive B.cisco. Answer: A Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD.2SX/configuration/guide/udld. active and aggressive C. 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/en/US/docs/switches/lan/catalyst6500/ios/12.com 61 . capabilities. UDLD puts the affected port into the errdisabled state and alerts the user. UDLD detects the existence of unidirectional links. UDLD puts the affected port into the errdisabled state and alerts the user.

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

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

16-bit D. 8-bit B.Cisco 300-115 Exam Answer: D Explanation: VTP version 1 and version 2 support VLANs 1 to 1000 only.com 64 .org/wiki/IEEE_802.wikipedia.ht ml QUESTION NO: 64 What is the size of the VLAN field inside an 802.com/en/US/docs/switches/lan/catalyst6500/ios/12. All other values may be used as VLAN identifiers.094 VLANs Reference: http://en. The hexadecimal values of 0x000 and 0xFFF are reserved. VLANs in the range 1006 to 4094 are removed from VTP control. If converting from VTP version 3 to VTP version 2.2SX/configuration/guide/vtp. 12-bit C.1q frame? A.1Q QUESTION NO: 65 www. 32-bit Answer: B Explanation: The VLAN field is a 12-bit field specifying the VLAN to which the frame belongs.cisco. Reference: http://www. Extended-range VLANs are supported only in VTP version 3. allowing up to 4.braindumps.

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

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

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

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

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

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

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

Upgrade to VTP version 3 for advanced feature set support. Reference: http://www.braindumps. D. VLAN access-map Answer: A Explanation: Cisco advocates the benefits of pruning VLANs in order to reduce unnecessary frame flooding. Enable VTP pruning on the VTP server.com/c/en/us/support/docs/switches/catalyst-6500-seriesswitches/24330-185. switchport trunk allowed VLAN D. access list C.com 75 .cisco. Manually prune default VLAN with switchport trunk allowed vlans remove. C. Use trunk pruning vlan 1. 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. Answer: C Explanation: Manaully pruning the default VLAN (1) can only be done with the “switchport trunk allowed vlans www.Cisco 300-115 Exam VTP pruning B. The “vtp pruning” command prunes VLANs automatically. B.

1_13_ea1/config uration/guide/swtunnel.com/en/US/docs/switches/lan/catalyst3550/software/release/12. Support 1522 layer 3 IP and IPX packet D. The “trunk pruning vlan 1” option is not a valid command. Support 1547 MTU only Answer: B Explanation: The default system MTU for traffic on Catalyst switches is 1500 bytes.Cisco 300-115 Exam remove” command. www.1Q tunneling (Q-in-Q) feature increases the frame size by 4 bytes when the extra tag is added. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning. Support 1504 MTU or higher C.cisco.html QUESTION NO: 79 Refer to the exhibit. Because the 802.com 76 . 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. Reference: http://www.braindumps. Support less than 1500 MTU B. QUESTION NO: 78 What is required for a LAN switch to support 802.1q Q-in-Q encapsulation? A.

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

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

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

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

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

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

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

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

When a port is initialized. in which all the spanning tree instances are independent.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired.cisco. Reference: http://www.1D switch and starts using only 802.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). it restarts the timer and starts using RSTP BPDUs on that port. MST establishes and maintains IST. 3 D. and CST spanning trees: •An IST is the spanning tree that runs in an MST region. what is the total number of spanning-tree instances running on the switch? A.braindumps.1D BPDU after the port migration-delay timer has expired. the switch processes all BPDUs received on that port and ignores the protocol type. if the RSTP switch is using 802. 2 C. 4 Answer: C Explanation: Unlike other spanning tree protocols. If the switch receives an 802.1D BPDUs. www.com 85 . 1 B. and RSTP BPDUs are sent. CIST. While this timer is active.1D switches. RSTP selectively sends 802. it assumes that it is connected to an 802.1D configuration BPDUs and TCN BPDUs on a per-port basis.Cisco 300-115 Exam Answer: A Explanation: For backward compatibility with 802.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/spantree. However.

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

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

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

cisco.Cisco 300-115 Exam B. Considering the default cost of upstream bridges to the root www. The switch priority value is zero. The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”. the more likely the switch will be chosen as the root switch. D. the range is 0 to 61440 in increments of 4096. Reference: http://www.braindumps. the default is 32768. C. All ports are members of VLAN 10.com 89 .com/en/US/docs/switches/lan/catalyst2950/software/release/12.19 and all ports are forwarding.1_9_ea1/configur ation/guide/swstp. The lower the number. it has the lowest priority value for VLAN 1. Answer: D Explanation: For priority. The bridge priority is 128.html#wp1020666 QUESTION NO: 91 Refer to the exhibit.

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

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

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

com 97 .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. 22 and 23 should tagged when traversing the trunk link. www. 21. Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all vlans.braindumps. with SwitchA controlling activation. This mode should be done with a nonproprietary protocol.

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

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 .

168.braindumps.1.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 192.13” SW-A(config)#spanning-tree vlan 11-13. 13 we have to create them first with command “SWA(config)#vlan 11.1 ! end Solution SW-A (close to router) Note: If Sw-A does not have Vlan 11.12. 12.com 101 .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.

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.com 102 . ——————————————————————————————– 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.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”.

1.1 (you can get this IP from SW-A with command show cdp neighbour detail) SW-B(config)#interface vlan 1 www.braindumps.168.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.com 103 .

will support two servers attached to fa0/13 and fa0/14 www. Sw-A is a 2900x series (or lower) switch and does not support ISL trunking protocol (802.1Q and we have to explicitly set which trunking protocol to be used.255. – SwitchA needs to be the root switch for vlans 11. 22 and 23. will support two servers attached to fa0/9 and fa0/10 – Vlan 22. ——————————————————— Some guidelines for configuring SwitchA & SwitchB: Configuration Requirements for SwitchA – The VTP and STP configuration modes on SwitchA should not be modified.21-23 root primary Configuration Requirements for SwitchB – Vlan 21.braindumps. 13. Name: Sales.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 1.1.11 255.255.1q 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. All other vlans should be left are their default values SW-A(config)#spanning-tree vlan 11-13.com 104 . 21. Name: Marketing.168.21-23 SW-B(config-if)#no shut Note: For Sw-B we have to set the 802.Cisco 300-115 Exam SW-B(config-if)#ip address 192.1Q is the only supported trunking protocol) so we can apply “switchport mode trunk” directly. 12.

22 and 23 should tagged when traversing the trunk link. 21.Cisco 300-115 Exam – Vlan 23. 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. vtp mode transparent – SwitchB must operate in the same spanning tree mode as SwitchA.com 105 .168. 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. interface vlan 1 ip address 192. with SwitchA controlling activation. Name: Engineering.braindumps.0 Inter-switch Connectivity Configuration Requirements: – For operational and security reasons trunking should be unconditional and Vlans 1.1.255.11 255. – 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.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.11/24. 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. spanning-tree mode rapid-pvst – No routing is to be configured on SwitchB. – Only the SVI vlan 1 is to be configured and it is to use address 192.255.168. This mode should be done with a nonproprietary protocol.

21. SW-A(config)#interface port-channel 1 SW-A(config-if)#switchport trunk allowed vlan 1. 22 and 23 should tagged when traversing the trunk link: SW-A(config-if)#interface port-channel 1 SW-A(config-if)#switchport mode trunk SW-A(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches SW-A(config-if)#no shut ————————————— SW-B(config)#interface range fa0/3 – 4 SW-B(config-if)#channel-group 1 mode passive SW-B(config-if)#channel-protocol lacp SW-B(config-if)#no shutdown SW-B(config-if)#interface port-channel 1 SW-B(config-if)#switchport trunk encapsulation dot1q SW-B(config-if)#switchport mode trunk SW-B(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches SW-B(config-if)#no shut – Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link.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 1.21-23 ————————————— SW-B(config)#interface port-channel 1 www.braindumps.com 106 .

You do not have access to RouteC.braindumps. If not. + At the end. SwitchA already have vlan 99 configured.1” on SwitchB. not sure if it can ping or not.com 107 .Cisco 300-115 Exam SW-B(config-if)#switchport trunk allowed vlan 1. show run (to check everything again). show vlan (check the native vlan and the existence of vlan99). QUESTION NO: 100 CORRECT TEXT SIMULATION You have been tasked with configuring multilayer SwitchC. 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).1.168. + 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. All routes must be learned via EIGRP 65010 routing protocol.21-23 Note: When configure this command under Port-channel 1. The following subnets are available to implement this solution: www. + When using “int range f0/x – y” command hit space bar before and after “-” otherwise the simulator does not accept it. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1. 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. you can try to ping from SwitchB to RouterA (you can get the IP on RouterA via the show cdp neighbors detail on SwitchA). Routed interfaces should use the lowest host on a subnet when possible. Also SwitchC needs to be able to ping server S1. No trunking has been configured on RouterC. Company policies forbid the use of static or default routing. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links. which has a partial configuration and has been attached to RouterC as shown in the topology diagram. show spanningtree [summary] (rapid-pvst mode on switchA and we have to set the same mode on switchB). RouterC is correctly configured. you can use the “ip default-gateway 192. show etherchannel 1 portchannel and show ip int brief(check if Port-channel 1 has been created and make sure it is up).

250.0/24 – 190.200.200. SwitchC uses Cisco as the enable password.250. Company policies forbid the use of static or default routing.10.Cisco 300-115 Exam – 10.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway. All routes must be learned via the EIGRP routing protocol.braindumps.32/27 – 190. www.com 108 . changes VLAN port assignments or create trunks. Note: Due to administrative restrictions and requirements you should not add or delete VLANs.10. Routing must only be enabled for the specific subnets shown in the diagram.

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

gi0/11 interfaces were configured as access www.33 Host2: + Default gateway: 190. Trunking must be established between RouterC and SwitchC.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.braindumps. 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.250. We should check the default gateways on H1 & H2.200. + Only use SwitchC for interVLAN routing without using RouterC.com 110 . Click on H1 and H2 and type the “ipconfig” command to get their default gateways. SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router).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. No trunking requires.250.200. Answer: \>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190.

0.255.com 111 .0.255.Cisco 300-115 Exam ports so we don’t need to configure them in this sim.255 SwitchC(config-router)# network 190.braindumps.10. also don’t modify/delete any port just do the above configuration.10.10.200. in fact it is not necessary because the network 190. no neighbor relationship is formed between RouterC and SwitchC. so you will not miss within it in the exam. 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.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190. www.10.200.255.250. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.1 so this is the lowest usable IP address.255.255. you should expect the ping to SERVER to succeed from the MLS.200.32 0. the simulator does not let you assign IP address on Gi0/1 interface.65 255.0 0.0. Also some reports said the “no auto-summary” command can’t be used in the simulator. If you use wrong AS number. In order to complete the lab.31 SwitchC(config-router)# network 190.0. and from the PCs as well.2 255.200.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED. SwitchC(config-if)# ip address 10.0.0.0.0 ->RouterC has used IP 10.224 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 10.250.64 0.200.0/16 is not used anywhere else in this topology.10.255.33 255.250. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.250.10.

only the summarized network 190.250.31 and “network 190.0.200.Cisco 300-115 Exam In fact.com 112 . Use the console access to the existing and new switches to configure and verify correct device configuration.0.braindumps.64 0.0 is shown.250.200.0.0. But after finishing the configuration. even without “no auto-summary” command the network still works correctly.200.0.200. just for sure. we are pretty sure instead of using two commands “network 190. we can use “show run” command to verify. www.32 0.0 because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised.0.31 we can use one simple command “network 190. But in the exam the sim is just a flash based simulator so we should use two above commands. QUESTION NO: 101 You have been asked to install and configure a new switch in a customer network.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

braindumps.com 127 . 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. Disable VTP pruning on SW1 only B. You are required to configure private VLANs for a new server deployment connecting to the SW4 switch.Cisco 300-115 Exam Examine the VTP configuration.

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

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

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

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

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

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

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

cisco. D. Reference: http://www. or unicast traffic as a percentage (up to two decimal places) of the bandwidth. The keywords have these meanings: •For level. storm control is disabled.braindumps. By default. multicast.D. The switch drops broadcasts when they reach 75% of bandwidth. Only broadcast traffic is limited by this particular storm control configuration. C.00. B. In which three ways does this command impact the traffic? (Choose three. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth. multicast. specify the rising threshold level for broadcast.html#wp1069615 QUESTION NO: 113 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server.com 135 . E.00 to 100.Cisco 300-115 Exam can configure IP source guard with source IP address filtering or with source IP and MAC address filtering. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. The port blocks traffic when the rising threshold is reached. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/122_25_see/configuration/guide/3550SCG/swdhcp82. or unicast storm control.) A. F. The range is 0.F Explanation: storm-control {broadcast | multicast | unicast} level {level [level-low] | pps pps [pps-low]} Configure broadcast. www. Answer: C.

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

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

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

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

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

the authentication server—performs the actual authentication of the client. RADIUS using VSA Answer: A Explanation: With 802.1x. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server.Cisco 300-115 Exam Which authentication service is needed to configure 802. RADIUS with EAP Extension B. Reference: http://www.com 141 . 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/c/en/us/td/docs/switches/lan/catalyst2940/software/release/121_19_ea1/configuration/guide/2940scg_1/sw8021x.cisco.pdf QUESTION NO: 120 Refer to the exhibit. the authentication service is transparent to the client. www.braindumps. TACACS+ C. RADIUS with CoA D. 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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Each www.cisco. You can have more than one isolated port in a specified isolated VLAN. as long as the promiscuous port and secondary VLANs are within the same primary VLAN. except that it can communicate with associated promiscuous ports. including the community and isolated host ports. configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command. You may want to do this for loadbalancing or redundancy purposes. You can have several promiscuous ports in a primary VLAN. trunk port Answer: A Explanation: The types of private VLAN ports are as follows: •Promiscuous—A promiscuous port belongs to the primary VLAN. Traffic received from an isolated port is forwarded only to promiscuous ports. Each promiscuous port can have several secondary VLANs. Reference: http://www.braindumps. Private VLANs block all traffic to isolated ports except traffic from promiscuous ports.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/snoodhcp. or no secondary VLANs. You can also have secondary VLANs that are not associated to any promiscuous port. This port has complete isolation from other ports within the same private VLAN domain. that belong to those secondary VLANs associated to the promiscuous port and associated with the primary VLAN.com 146 .Cisco 300-115 Exam •If a Layer 2 LAN port is connected to a DHCP client. promiscuous port B. including the community and isolated host ports? A. isolated port C. associated to that port. You can associate a secondary VLAN to more than one promiscuous port. The promiscuous port can communicate with all interfaces.html QUESTION NO: 125 Which private VLAN access port belongs to the primary VLAN and can communicate with all interfaces. community port D. •Isolated—An isolated port is a host port that belongs to an isolated secondary VLAN.

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

com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/PrivateVLANs. • Verifies that a packet has a valid IP-to-MAC address binding before updating the ARP cache or forwarding the packet. dynamic routing database D. DHCP snooping database B. • Drops invalid ARP packets. dynamic ARP database C. The ports within one community can communicate.com 148 . You can configure multiple community VLANs in a private VLAN domain. 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. It may also contain static entries www. Reference: http://www.cisco.braindumps.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. but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN.

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

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

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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ports.
•Ethernet Port Channels—Port security is not supported on Ethernet port channels.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nxos/security/configuration/guide/sec_nx-os-cfg/sec_portsec.html

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

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

QUESTION NO: 135
When you configure a private VLAN, which type of port must you configure the gateway router port
as?
A.
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it is necessary to restrict access to VLAN 20 in the following manner: Users connecting to VLAN 20 via portfO/1 on ASW1 must be authenticated before they are given access to the network. Authentication is to be done via a Radius server: Radius server host: 172. The topology diagram indicates their layer 2 mapping.Cisco 300-115 Exam promiscuous port B.40.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). access port Answer: A Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. For security reasons.braindumps. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.wikipedia. Devices on VLAN 20 are restricted to the subnet of 172.46 Radius key: rad123 Authentication should be implemented as close to the host as possible. Reference: http://en.120. Packets from devices in the subnet of 172.0/24.40. community port D. Corporate polices do not allow layer 3 functionality to be enabled on the switches. DSW1 and ASW1.120. Packets from devices in any other address range should be dropped on VLAN 20.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches.com 155 .40. Filtering should be implemented as close to the server farm as possible.120. www.0/24 should be allowed on VLAN 20. isolated port C.

You must use the available IOS switch features. Note: Named access list is not supported.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.braindumps. www.

46 key rad123 ASW1(config)#aaa authentication dot1x default group radius ASW1(config)#dot1x system-auth-control ASW1(config)#inter fastEthernet 0/1 ASW1(config-if)#switchport mode access ASW1(config-if)#dot1x port-control auto ASW1(config-if)#exit ASW1#copy run start Step2: Console to DSW1 from PC console 2 DSW1(config)#ip access-list standard 10 DSW1(config-ext-nacl)#permit 172.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 172.0.255 DSW1(config-ext-nacl)#exit DSW1(config)#vlan access-map PASS 10 DSW1(config-access-map)#match ip address 10 www.120.120.39.com 157 .0.0 0.braindumps.40.

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

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

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

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

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.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.com 162 .18 – IP 112 224.0.0.102-udp 1985 (version2) 224.0.0.0.braindumps.0.2 – udp 1985 (version1)224.0.

wordpress. 15 Answer: C Explanation: The standby track interface configuration command ties the router hot standby priority to the availability of its interfaces and is useful for tracking interfaces that are not configured for HSRP.Cisco 300-115 Exam Load-balancing functionality .Multiple VRRP group per interface/SVI/routed int.braindumps.Weighted algorithm. Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing.com 163 .Host-dependent algorithm. 1 B. 5 C.Multiple HSRP group per interface/SVI/routed int. Load-balancing oriented. 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. 10 D.Round-Robin algorithm (default). .(generally through DHCP) Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing. Reference: http://cciethebeginning.(generally through DHCP) Clients are transparently updated with virtual MAC according to load-balancing algorithm through ARP requesting a unique virtual gateway.

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

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

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

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

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

Reference: http://www. then some other device with a MAC address reports this error message.com/en/US/products/hw/switches/ps708/products_configuration_example09186a 00807d2520.cisco. permit the Multicast address by permit 224. When configuring the multicast boundary command.255. then it indicates that this router is receiving its own hello packets sent.0.0. Layer 2 loop Answer: D Explanation: This section provides information you can use to troubleshoot your configuration. Unavailable GLBP active forwarder B.102 and User Datagram Protocol (UDP) port 3222 (source and destination).255.255.braindumps. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224. Verify the spanning-tree topology and check if there is any layer2 loop. issue the show interface command to verify the MAC address of the interface. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues.Cisco 300-115 Exam Which option describes the reason for this message in a GLBP configuration? A.0. If the interface MAC address is different from the one reported in the error message. If the MAC address of the interface is the same as the one reported in the error message.0 15. HSRP configured on same interface as GLBP D.0. In order to resolve this issue.com 169 . Incorrect GLBP IP address C.shtml#dr www.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

They have questions about how these two devices will perform in the event of a device failure. www.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.braindumps.com 185 . Click on the devices or the tabs at the bottom of the screens to access the CLI to answer their questions.

R2-50% C.braindumps. R2-100% www. R1-0% B.16.Cisco 300-115 Exam What percentage of the outgoing traffic from the 172.com 186 . R1-50 %.10.0/24 subnet is being forwarded through R1? A.

Cisco 300-115 Exam D. 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. so all outgoing traffic will be forwarded to R1. www.com 187 . They have questions about how these two devices will perform in the event of a device failure.braindumps. R1-100% Answer: D Explanation: Based on the following output. we see that R1 is the active standby router for the Ethernet 0/0 link. 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 www.braindumps.com 188 .

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

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

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

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

braindumps.com 193 .Cisco 300-115 Exam This can be further verified by issuing the “show standby” command on each router. www. Click on the devices or the tabs at the bottom of the screens to access the CLI to answer their questions. 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. They have questions about how these two devices will perform in the event of a device failure.

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

ac02 F.0010 C.0c07.0c07.0010 Answer: B Explanation: Issuing the “show standby” command on either router shows us that the virtual MAC used by HSRP group 1 is 4000.com 195 . 4000.0010 as shown below: www. 0000.Cisco 300-115 Exam What is the virtual mac-address of HSRP group 1? A.0c07. 4000.ac02 B.0000. 4000.ac01 E.0000. 0000.0000.0000.ac01 D. 0000.braindumps.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

com 211 . 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.Cisco 300-115 Exam VLAN database B.braindumps. 2000 bindings C. Layer 1 www. spanning trees D. routing information Answer: C Explanation: QUESTION NO: 182 Which option is the minimum number of bindings that the DHCP snooping database can store? A. 1000 bindings B. DHCP snooping database C.

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

E.Cisco 300-115 Exam C. VRRP is a Cisco proprietary protocol.com 213 .D Explanation: QUESTION NO: 186 Refer to the exhibit. Answer: C. HSRP misconfiguration C. Which option is the most likely explanation of the duplicate address message logged? A. a PC with IP of 10. a hardware problem Answer: B www. HSRP supports up to 255 groups on the same switch or router.10. D. spanning-tree loop B. GLBP allows for a maximum of four MAC addresses per group.1 D.braindumps.1.

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.com 214 .braindumps. Answer: Explanation: www.

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

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

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