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Actualtests 300-115

Number: 300-115
Passing Score: 800
Time Limit: 120 min
File Version: 16.5

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Exam code: 300-115
Exam name: Implementing Cisco IP Switched Networks

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Question Set 1
QUESTION 1
What is the maximum number of switches that can be stacked using Cisco StackWise?
A.
B.
C.
D.
E.
F.

4
5
8
9
10
13

Correct Answer: D
Section: [none]
Explanation
Explanation/Reference:
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-series- switches/qa_c67-722110.html
QUESTION 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.
B.
C.
D.
E.

No configuration must be added.
stack ID
IP address
VLAN information
VTP information

Correct Answer: A
Section: [none]
Explanation
Explanation/Reference:
Explanation:
Switch Stack Offline Configuration

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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 inter- faces 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 re- ceives 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 provi- sioned 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.
Table 5-1 Results of Comparing the Provisioned Configuration with the Provisioned Switch
Scenario Result
The stack member num- 1. If the stack member number The switch stack applies bers and the switch types of the provisioned switch the provisioned configuramatch. matches the stack member num- tion to the provisioned ber in the provisioned configura- switch and adds it to the tion on the stack, and stack.
2. If the switch type of the provisioned switch matches the switch
type in the provisioned configuration on the stack.
The stack member num- 1. If the stack member number The switch stack applies bers match but the switch of the provisioned switch the default configuration to
types do not match. matches the stack member num- the provisioned switch and ber in the provisioned configuration on the stack, but adds it to the stack.
2. The switch type of the provi- The provisioned configura- sioned switch does not match the tion is changed to reflect switch type in the provisioned the new
information.
configuration on the stack.

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The stack member num- The switch stack applies
ber is not found in the pro- the default configuration to
visioned configuration. the provisioned switch and
adds it to the stack.
The provisioned configuration is changed to reflect
the new information.
The stack member num- The stack master assigns a new The switch stack applies ber of the provisioned stack member number to the pro- the provisioned
configura- switch is in conflict with an visioned switch. tion to the provisioned existing stack member. switch and adds it to the
The stack member numbers and
stack.
the switch types match:
The provisioned configura1. If the new stack member
tion is changed to reflect
number of the provisioned switch
the new information.
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 stack member numbers The switch stack applies
match, but the switch types do the default configuration to not match: the provisioned switch and
adds it to the stack.
1. If the stack member number
of the provisioned switch The provisioned configuramatches the stack member num- tion is changed to reflect
ber in the provisioned configura- the new information.
tion 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.

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E. Cisco StackWise Technology Resilient Cabling Reference: http://www. 0 25 50 75 100 Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Physical Sequential Linkage The switches are physically connected sequentially.The switch stack applies ber of the provisioned the default configuration to switch is not found in the the provisioned switch and provisioned configuration. Reference: http://www. A break in any one of the cables will result in the stack bandwidth being reduced to half of its full capacity.2_55_se/configuration/guide/3750xscg/swstack.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12. This mechanism restores dual path flow when the timing mechanisms detect renewed activity on the cable.cisco. as shown in Figure 3.exam. B.switches/prod_white_paper09186a00801b096a.The stack member num.cisco. Figure 3.html QUESTION 4 http://www. adds it to the stack. D. Subsecond timing mechanisms detect traffic problems and immediately institute failover.com/c/en/us/products/collateral/switches/catalyst-3750-series.html QUESTION 3 What percentage of bandwidth is reduced when a stack cable is broken? A.com/ . C.

exam. Which set of configurations will result in all ports on both switches successfully bundling into an EtherChannel? A.Refer to the exhibit.com/ . switch1 channel-group 1 mode desirable switch2 channel-group 1 mode passive C. switch1 channel-group 1 mode on switch2 channel-group 1 mode auto http://www. switch1 channel-group 1 mode active switch2 channel-group 1 mode auto B.

tion. Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible.D. For example: An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode. for Layer 2 EtherChannels. This setting minimizes the transmission of PAgP packets. in which the interface starts negotiations with other interfaces by sending PAgP packets. Reference: http://www. Both the auto and desirable PAgP modes allow interfaces to negotiate with partner interfaces to determine if they can form an EtherChannel based on criteria such as interface speed and. trunking state and VLAN numbers.sponds to PAgP packets it receives but does not start PAgP packet negotia. 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. 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. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode auto Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: The different etherchannel modes are described in the table below: Mode Description active Places an interface into an active negotiating state. With the on mode.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12. auto Places an interface into a passive negotiating state. on Forces the interface into an EtherChannel without PAgP or LACP. An interface in the auto mode can form an EtherChannel with another interface in the desirable mode.html QUESTION 5 Refer to the exhibit. desirable Places an interface into an active negotiating state. passive Places an interface into a passive negotiating state. but does not start LACP packet negotiation.cisco. in which the interface re. This setting minimizes the transmission of LACP packets.sponds to LACP packets that it receives. in which the interface starts negotiations with other interfaces by sending LACP packets. in which the interface re. a usable EtherChannel exists only when an interface group in the on mode is connected to another interface group in the on mode.com/ .1_13_ea1/configuration/guide/3550scg/swethchl. http://www.exam.

com/ 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.exam.exam. C. http://www. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: To start a new flow-based SPAN (FSPAN) session or flow-based RSPAN (FRSPAN) source or destination session.com/ . Change the monitor session source to VLAN 10 instead of the physical interface. B. Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10. Apply the monitor session filter globally to allow only traffic from VLAN 10. or to limit (filter) SPAN source traffic to specific VLANs. use the monitor session filter global configuration command. D.http://www. Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10.

D. 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. | -] options. If you specify a series of VLANs.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/network_m anagement/command_reference/b_nm_3se_3850_cr/ b_nm_3se_3850_cr_chapter_010. E. VLAN filtering refers to analyzing network traffic on a selected set of VLANs on trunk source ports.cisco.exam. Reference: http://www. F. If you specify a range of VLANs. VLAN monitoring and VLAN filtering are mutually exclusive. By default. VLAN filtering cannot be enabled.) A. A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination A remote SPAN VLAN on the distribution and access layer switch A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination A monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination A monitor session on the distribution switch with a physical interface as the source and a physical interface as the destination http://www. You can have a total of 66 SPAN and RSPAN sessions on a switch or switch stack. you must enter a space before and after the hyphen ( -). If a VLAN is a source.html#wp3 875419997 QUESTION 6 Refer to the exhibit. If VLAN filtering is configured. B. You select a series or range of VLANs by using the [ . all VLANs are monitored on trunk source ports.Usage Guidelines You can set a combined maximum of two local SPAN sessions and RSPAN source sessions. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three. C.com/ . a VLAN cannot become a source. A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. You can monitor traffic on a single VLAN or on a series or range of ports or VLANs. you must enter a space before and after the comma.

D. which is an LACP mode.Correct Answer: BCD Section: [none] Explanation Explanation/Reference: 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. B.exam. SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a destination port for analysis. This setting http://www. C. Each RSPAN source switch must have either ports or VLANs as RSPAN sources. The switches are using mismatched EtherChannel negotiation modes. and destination ports on different switches (or different switch stacks). while Switch B is configured with channel-group 1 mode desirable. and the other is using desirable. Switch A is configured with channel-group 1 mode active. RSPAN supports source ports.com/ . The destination is always a physical port Reference: http://www. 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.html QUESTION 7 After an EtherChannel is configured between two Cisco 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 Places a port into a passive negotiating state. which is a PAGP mode. The channel group identifier must be different for Switch A and Switch B. in which the port responds to PAgP packets it receives but does not start PAgP packet negotiation.2_55_se/configuration/guide/3750xscg/swspan.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12. You can not mix the LACP and PAGP protocols to form an etherchannel.cisco. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Here we have a situation where one switch is using active mode. The switch ports are not configured in trunking mode. enabling remote monitoring of multiple switches across your network. LACP priority must be configured on both switches. The traffic for each RSPAN session is carried over a user-specified RSPAN VLAN that is dedicated for that RSPAN session in all participating switches. source VLANs.

C. The mode you select applies to all EtherChannels that you configure on the switch.ent switches in the switch stack (cross-stack EtherChannel). but does not start LACP packet negotiation. Use the option that provides the greatest variety in your configuration. use of the destination MAC address results in the choice of the same link in the channel each time. B. Use link-state tracking to allow for improved load balancing of traffic upon link failure to the server.exam.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12.tions with other ports by sending LACP packets. Use of source addresses or IP addresses can result in a better load balance. Reference: http://www.html QUESTION 8 An EtherChannel bundle has been established between a Cisco switch and a corporate web server.minimizes the transmission of PAgP packets. desirable Places a port into an active negotiating state. Enable Cisco Express Forwarding to allow for more effective traffic sharing over the EtherChannel bundle. destination mode.com/ . Reference: http://www. or Layer 4 port numbers. if the traffic on a channel only goes to a single MAC address (which is the case in this example.html http://www. This setting minimizes the transmission of LACP packets.2_55_se/configuration/guide/scg_2960/swethchl. or both. What should be done on the Cisco switch to allow for better EtherChannel utilization to the corporate web server? A.cisco.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. Disable spanning tree on all interfaces that are participating in the EtherChannel bundle. since all traffic is going to the same web server). This mode is not supported when the EtherChannel members are from differ. and either source mode. The network administrator noticed that only one of the EtherChannel links is being utilized to reach the web server. passive Places a port into a passive negotiating state in which the port responds to LACP packets that it receives. D. This mode is not supported when the EtherChannel members are from differ. For example.ent switches in the switch stack (cross-stack EtherChannel). EtherChannel LACP Modes Mode Description active Places a port into an active negotiating state in which the port starts negotia. Adjust the EtherChannel load-balancing method based on destination IP addresses. IP addresses. E. in which the port starts negotia. Correct Answer: E Section: [none] Explanation Explanation/Reference: Explanation: EtherChannel load balancing can use MAC addresses.tions with other ports by sending PAgP packets. Adjust the EtherChannel load-balancing method based on source IP addresses.

and 52 is replicated to the SPAN destination port.exam. E. 39.5 .cisco. then each router will only have the single switch port that it connects to as its neighbor.html#wp1066836 QUESTION 10 A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided. Traffic from VLANs 1 to 8. Correct Answer: E Section: [none] Explanation Explanation/Reference: Explanation: The "monitor session filter" command is used to specify which VLANS are to be port mirrored using SPAN. C. Cisco Express Forwarding is enabled locally.8. 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 . Traffic from VLAN 4 is not sent to the SPAN destination interface. D. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: If all of the routers are connected to each other using a layer 2 switch.com/ . B. 9 Reference: http://www. This command is configured globally: monitor session 2 filter vlan 1 .QUESTION 9 Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. D. 39. IP routing is disabled on neighboring devices.com/c/en/us/td/docs/switches/lan/catalyst4500/12. but it has several routing neighbor relationships. Filtering a trunked SPAN port effectively disables SPAN operations for all VLANs. 52 What is the result of the implemented command? A.2/25ew/configuration/guide/conf/span. The engineer notices only a single neighbor that uses Cisco Discovery Protocol. All VLAN traffic is sent to the SPAN destination interface.html/index. Even http://www. C. The routers are connected via a Layer 2 switch. B. What would cause the output to show only the single neighbor? A. Cisco Discovery Protocol advertisements are inconsistent between the local and remote devices. The trunk's native VLAN must be changed to something other than VLAN 1.

All of the new switches have been configured with the same VTP domain. capabilities. http://www. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name.org/wiki/Link_Layer_Discovery_Protocol QUESTION 12 Several new switches have been added to the existing network as VTP clients. but not necessarily the logical topology. such as the Cisco Discovery Protocol (CDP). and version. CDP can be used to determine the physical topology.com/ . Which vendor-neutral protocol could be used to resolve this issue? A. D. Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred. However. principally wired Ethernet. Configure a different native VLAN on all new switches that are configured as VTP clients. VLANs are not passing from the VTP server (existing network) to the VTP clients. Provision one of the new switches to be the VTP server and duplicate information from the existing network. only the physical port that it connects to will be seen as a CDP neighbor. What must be done to fix this? http://www. B. QUESTION 11 After the implementation of several different types of switches from different vendors.though multiple routing neighbors can be formed over a layer 2 network.com/ A. Local Area Mobility Link Layer Discovery Protocol NetFlow Directed Response Protocol Correct Answer: B Section: [none] Explanation Explanation/Reference: 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. password.exam. C. C.wikipedia. B. D.exam. Reference: http://en. a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible. LLDP performs functions similar to several proprietary protocols. and neighbors on an IEEE 802 local area network.

All VLAN changes must be done on this switch in order to have them propagated to the VTP clients. CISCO and cisco are two different domain names. Make sure that if EtherChannels are created between two switches. Make sure that the VLANs are active in all the devices. Make sure that no password is set between the server and client.1SY/config_guide/sup2T/vtp . only Layer 2 EtherChannels propagate VLAN information.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. VTP does not support extended VLANs and should be manually added to all switches. D. ·The VTP domain name must match and it is case sensitive. Reference: http://www. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking. You must configure extended-range VLANs manually on each network device. There are several reasons why the VLAN information can fail to be exchanged. Extended VLANs will not propagate to different IOS versions when extended VLANs are in use. the VLANs in the range 1006 to 4094 are removed from VTP control. make sure that the password is the same on both sides. What should be configured for extended VLANs? A.com/en/US/docs/switches/lan/catalyst6500/ios/15. B. VTP version 3 supports extended-range VLANs (VLAN numbers 1006 to 4094). Reference: http://www. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: VTP version 1 and VTP version 2 do not propagate configuration information for extended.pdf QUESTION 14 http://www.exam. One of the switches must be the VTP server in a VTP domain.com/ . C. which supports extended VLAN propagation. VTP authentication is required when using extended VLANs because of their ability to cause network instability. Ensure that all switches run the same Cisco IOS version. the extended VLANs are not being propagated to other VTP switches. VTP allows a consistent view of the switched network across all switches.shtml QUESTION 13 After implementing VTP. If you convert from VTP version 3 to VTP version 2. Enable VTP version 3.cisco. Verify these items if switches that run VTP fail to exchange VLAN information: VTP information only passes through a trunk port. If any password is set.Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: VTP allows switches to advertise VLAN information between other members of the same VTP domain.range VLANs (VLAN numbers 1006 to 4094).cisco.

C. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: VTP transparent switches do not participate in VTP. The trunk between Switch A and Switch B is misconfigured. The VTP revision number of the Switch B is higher than that of Switch A.com/ .com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52. Reference: http://www. but transparent switches do forward VTP advertisements that they receive out their trunk ports in VTP Version 2. Switch A. B. but Switch B does not receive any VLAN information. http://www.Refer to the exhibit. What is the most probable cause of this behavior? A. Switch C receives VLAN information from the VTP server Switch A. and C are trunked together and have been properly configured for VTP. B.exam. D. A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements. while Switch C is configured with a trunk port to Switch B.cisco.shtml QUESTION 15 Refer to the exhibit. Switch B is configured in transparent mode. Switch B is configured with an access port to Switch A.

Switch A.com/ . What would cause this issue? A. A VTP authentication mismatch occurred between Switch A and Switch B. QUESTION 16 After the recent upgrade of the switching infrastructure. the network engineer notices that the port roles that were once "blocking" are now defined as "alternate" and "backup. a switch floods broadcast. C. The administrator has defined the switch as the root in the STP domain. VTP pruning blocks unneeded flooded traffic to VLANs on trunk ports that are included in the pruningeligible list. The trunk between Switch A and Switch B is misconfigured.exam. B. VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface that is connected to Switch C. C. The new switches are using RSTP instead of legacy IEEE 802. and unknown unicast traffic across all trunk links within a VTP domain even though receiving switches might discard them. The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco Catalyst switches. http://www. VTP pruning is disabled by default. The VTP revision number of Switch B is higher than that of Switch A. B. and C are trunked together and have been properly configured for VTP. Without VTP pruning." What is the reason for this change? A. is that VTP pruning has been configured. B. Switch B has all VLANs. multicast.1D STP and PortFast have been configured by default on all newly implemented Cisco Catalyst switches. IEEE 802. but Switch C is not receiving traffic from certain VLANs. D. Correct Answer: C Section: [none] Explanation Explanation/Reference: 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. D. The best explanation for why switch C is not seeing traffic from only some of the VLANs.1D STP.

This automatic link type setting can be overridden by explicit configuration. This path is different than using the root port. To have two links to the same collision domain. In switched networks today. RSTP has been enabled per interface and not globally. A port that operates in full-duplex is assumed to be point-to-point. The switch does not have the processing power to ensure rapid transition for all ports. STP is unable to achieve rapid transition for trunk links. C. B.protocol/24062-146.com/c/en/us/support/docs/lan-switching/ spanning-tree. * Disabled port Not strictly part of STP.protocol/24062-146.exam. 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. After testing. The link type is automatically derived from the duplex mode of a port. What is the reason for this? A.Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: RSTP works by adding an alternative port and a backup port compared to STP. not on trunk links. The backup port applies only when a single switch has two links to the same segment (collision domain).html QUESTION 17 An administrator recently configured all ports for rapid transition using PortFast. The alternative port moves to the forwarding state if there is a failure on the designated port for the segment. Reference: http://www. D. * Backup port A backup/redundant path to a segment where another bridge port already connects.com/ .cisco.com/c/en/us/support/docs/lan-switching/spanning-tree.cisco.point links. This makes them candidates for rapid transition to the forwarding state. These ports are allowed to immediately enter the forwarding state rather than passively wait for the network to converge. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: RSTP can only achieve rapid transition to the forwarding state on edge ports and on point-to. it has been determined that several ports are not transitioning as they should. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. most links operate in full-duplex mode and are treated as point-to-point links by RSTP. while a half-duplex port is considered as a shared port by default. the switch must be attached to a hub. a network administrator can manually disable a port Reference: http://www.html QUESTION 18 Which technique automatically limits VLAN traffic to only the switches that require it? http://www.

2SX/configuration/guide/book/vtp. multicast. The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes. By default. access lists DTP in nonegotiate VTP pruning PBR Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic. ARP requests will be processed less frequently by the switch. Reference: http://www.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. VTP pruning is disabled. E.exam. and flooded unicast packets to only the switches that require it.and is discarded from the MAC address table. The default timeout period will be 360 seconds. the default is vlan_id] 300 seconds.A. Correct Answer: A Section: [none] Explanation Explanation/Reference: 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. terminal Step 2 switch(config)# mac. This is how long a dynamic MAC address will remain in the CAM table. The MAC address-table will be flushed every 3 minutes. VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices.com/ .table? A.html#wp1020444 QUESTION 19 What effect does the mac address-table aging-time 180 command have on the MAC address. To configure the aging time for all MAC addresses. D. Entering the value 0 disables the http://www.cisco. perform this task: Command Purpose Step 1 switch# configure Enters configuration mode.Specifies the time before an entry ages out address-table aging. D. B. unknown. C. time seconds [vlan The range is from 0 to 1000000. C. such as broadcast. B.

macros errdisable autorecovery IP Event Dampening command aliases Bidirectional Forwarding Detection Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: There are a number of events which can disable a link on a Catalyst switch. this can be done by issuing shutdown followed by no shutdown on the interface. Reference: http://packetlife. D. What is the root cause of this issue? A.exam. However. UDLD failure.com/ . or a broadcast storm. The idea behind requiring administrative action is so that a human engineer can intercede. assess. By default. This is where errdisable autorecovery can be of great assistance. some configurations may be prone to accidental violations. The SDM VLAN template causes the MAC address-table to overflow. After the damaged cable was replaced. 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.net/blog/2009/sep/14/errdisable-autorecovery/ QUESTION 21 A network engineer deployed a switch that operates the LAN base feature set and decides to use the SDM VLAN template. E.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/MACAddress. the link was placed into a non-forwarding state due to a fault with UDLD. The SDM template is causing the CPU of the switch to spike during peak working hours.html#wp1126206 QUESTION 20 While working in the core network building. C. http://www. the aging specification applies to all VLANs. The VLAN receives additional frames from neighboring switches. As designed.cisco. B. B. manual intervention by an administrator is necessary to restore the interface to working order. by removing an unapproved device) without the need for administrative intervention. the link did not recover.MAC aging. This gives the offending issue a chance to be cleared by the user (for example. What solution allows the network switch to automatically recover from such an issue? A. and (ideally) correct the issue. and a steady recurrence of these can amount to a huge time sink for the administrative staff. a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber. If a VLAN is not specified. such as the detection of a loopback. We can configure the switch to automatically re-enable any error-disabled interfaces after a specified timeout period.

RSPAN must be used to capture EtherChannel bidirectional traffic. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: A source port or EtherChannel is a port or EtherChannel monitored for traffic analysis. Trunk ports or EtherChannels can be configured as sources and mixed with nontrunk sources. as opposed to the original access control entries (ACEs) configured by the user. SPAN encapsulation replication must be enabled to capture EtherChannel destination traffic.com/ . The VLAN template disables routing in hardware. The switch reload is required to use a new SDM template. the network administrator notices that not all traffic is being replicated to the management server. What is a cause for this issue? A. generate the number of TCAM entries listed for security and QoS ACEs. C.exam. The switch needs to be rebooted before the SDM template takes effect. You can configure ports or EtherChannels in any VLAN as SPAN sources. The ACL merge algorithm.html QUESTION 22 An access switch has been configured with an EtherChannel port.cisco. There is no way to edit template category individual values. D. all processing overflow is sent to the CPU which can have a major impact on the performance of the switch. VLAN filters are required to ensure traffic mirrors effectively. A port-channel interface (an EtherChannel) can be a SPAN source.html#wp1040905 http://www. but not a destination.C. but not a destination. Choosing the VLAN template will actually disable routing (number of entry for unicast or multicast route is zero) in hardware. If the boundary is exceeded. You can configure both Layer 2 and Layer 3 ports and EtherChannels as SPAN sources. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: SDM Template Notes: All templates are predefined.com/c/en/us/support/docs/switches/catalyst-3750-series.switches/44921-swdatabase-3750ss-44921. B.cisco. Reference: http://www. The first eight lines (up to Security ACEs) represent approximate hardware boundaries set when a template is used. Reference: http://www. SPAN can monitor one or more source ports or EtherChannels in a single SPAN session. After configuring SPAN to monitor this port.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/book/ span. D. The port channel can be used as a SPAN source.

B.com/ . The EtherChannels would form. What is the result of the configuration? A. but network loops would occur because the load-balancing methods do not match. The EtherChannels would form and function properly even though the load-balancing and EtherChannel modes do not match.QUESTION 23 Refer to the exhibit. C. The EtherChannels would form and both devices would use the dst-ip load-balancing method because Switch1 is configured with EtherChannel mode active. The table below sum. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: An etherchannel will form if one end is active and the other is passive.marizes the results for LACP channel establishment based on the http://www. D.exam. The EtherChannels would not form because the load-balancing method must match on the devices.

Storm Control must be configured on all or none of the ports. The settings will be applied to the EtherChannel bundle and all associated physical interfaces.configuration of each side of a link: LACP Channel Establishment S1 S2 Established? On On Yes Active/Passive Active Yes On/Active/Passive Not Configured No On Active No Passive/On Passive No Load balancing can only be configured globally. The storm control configuration will be accepted. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: After you configure an EtherChannel.cisco. Reference: http://www.com/ . but will only be present on the physical interfaces. although each switch involved in the etherchannel can have non matching parameters for load balancing. any configuration that you apply to the port-channel interface affects the EtherChannel. or LACP) use the same load-balancing.2/54sg/configuration/guide/config/channel.com/c/en/us/td/docs/switches/lan/catalyst4500/12. Therefore.cisco. This is true for the switch globally.2/31sg/configuration/guide/ conf/channel. C.html QUESTION 25 What is the function of NSF? A. PagP. those ports will be dropped from the EtherChannel interface (put in suspended state). forward traffic based on Cisco Express Forwarding C.html#wp1020804 QUESTION 24 A network engineer tries to configure storm control on an EtherChannel bundle. What is the result of the configuration? A. B. all channels (manually configured. you cannot configure Storm Control on some of the members of an EtherChannel. provide automatic failover to back up supervisor in VSS mode http://www. D. The configuration will be rejected because storm control is not supported for EtherChannel. If you configure Storm Control on only some of the ports. Reference: http://www. Storm Control is an exception to this rule. forward traffic simultaneously using both supervisors B.exam. but not on the associated physical ports.com/c/en/us/ td/docs/switches/lan/catalyst4500/12. As a result. any configuration that you apply to the physical interfaces affects only the interface where you apply the configuration. The storm control settings will appear on the EtherChannel. and not at the physical interface level. For example. you should configure Storm Control at the EtherChannel Interface level.

C. UDLD timers are inconsistent. The port then transitions into the errdisable state. In a VSS.over-blog. Normal UDLD operations that prevent traffic loops.2SX/configuration/guide/book/udld. when a port on a bidirectional link that has a UDLD neighbor relationship established stops receiving UDLD packets.com/c/en/us/td/docs/switches/lan/ catalyst6500/ios/12. Which option describes what causes the port to go into the errdisable state? A.D. Only one of the virtual switch members has the active control plane. UDLD is enabled globally. 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. increasing operational efficiency.com/article-cisco-catalyst-6500-series-vss-1440. D.cisco. http://www. UDLD port is configured in aggressive mode.124536783. the port is disabled. Reference: http://www. an engineer notices that the. 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." Which statement describes what this indicates about the status of the port? A. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: With UDLD aggressive mode enabled.exam.com/ .html QUESTION 27 After reviewing UDLD status on switch ports. VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE. Switches would operate as a single logical virtual switch called a virtual switching system 1440 (VSS1440). B. combining for an active 1400Gbps switching capacity per VSS. boosting nonstop communications. provide nonstop forwarding in the event of failure of one of the member supervisors Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: VSS is network system virtualization technology that pools multiple Cisco Catalyst 6500 Series Switches into one virtual switch. The port is fully operational and no known issues are detected. a Network Administrator noticed that one port stops receiving UDLD packets. UDLD tries to reestablish the connection with the neighbor. Reference: http://ciscorouterswitch. and scaling system bandwidth capacity to 1. This port continues to reestablish until after eight failed retries. After eight failed retries.html QUESTION 26 After UDLD is implemented.4 Tbps.

UplinkFast provides fast convergence after a direct link failure and achieves load balancing between redundant Layer 2 links using uplink groups. B. you can accelerate the choice of a new root port when a link or switch fails or when the spanning tree reconfigures itself. The bidirectional status of "unknown" indicates that the port will go into the disabled state because it stopped receiving UDLD packets from its neighbor. F. E. When UDLD is finally enabled on the other end. or individually on specific interfaces with the command udld port. it begins using the alternate paths as soon as the spanning tree selects a new root port. It would be prohibitively difficult to coordinate the configuration of UDLD on both ends of a link at the same time. By enabling UplinkFast with the spanningtree uplinkfast global configuration command.com/ . D. PVST+ PortFast BackboneFast UplinkFast Loop Guard UDLD Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: I f a switch loses connectivity. UDLD moved into aggressive mode after inconsistent acknowledgements were detected. The port will remain operational during this time. the status will transition to bidirectional. so when UDLD is first enabled and does not detect a neighbor the link state is considered unknown. UDLD is disabled on all interfaces. An uplink group is a set of Layer 2 interfaces (per VLAN). STP immediately replaces the root port with an alternative root port. The UDLD port is placed in the "unknown" state for 5 seconds until the next UDLD packet is received on the interface. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: By default. which is not necessarily an error condition.B. as it would with the normal spanning-tree procedures.net/blog/2011/mar/7/udld/ QUESTION 28 Pilot testing of the new switching infrastructure finds that when the root port is lost. only one of which is forwarding at any given time. C. Specifically.exam. Which spanning-tree technology is used to accomplish backup root port selection? A. D. The root port transitions to the forwarding state immediately without going through the listening and learning states. We can enable UDLD globally on the device. This enables UDLD in normal mode. C. an uplink group consists of the root port (which is forwarding) http://www. Reference: http://packetlife.

) A. The uplink group provides an alternate path in case the currently forwarding link fails.and a set of blocked ports. Reference: http://www.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12. 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. E. including switch and MAC addresses.exam. Which two elements are used to accomplish this? (Choose two. 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.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12. Which action must be done to apply a new load balancing method? A. Reference: http://www. Switches send and receive spanning-tree frames.2_55_se/configuration/guide/3750xscg/swstp. and path cost. Adjust the switch SDM back to "default". 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. switch priority. the spanningtree algorithm recalculates the spanning-tree topology and activates the standby path. Upgrade the PFC to support the latest load balancing methods. The path cost value represents the media speed. called bridge protocol data units (BPDUs). port-priority cost forward-timers link type root guard Correct Answer: AB Section: [none] Explanation Explanation/Reference: Explanation: Spanning tree forces redundant data paths into a standby (blocked) state. C.cisco. B.com/ . at regular intervals. Correct Answer: A Section: [none] Explanation http://www. If a network segment in the spanning tree fails and a redundant path exists. When two ports on a switch are part of a loop.cisco. C.html QUESTION 29 A network engineer must adjust the STP interface attributes to influence root port selection. Ensure that IP CEF is enabled globally to support all load balancing methods. Configure the new load balancing method using port-channel load-balance.2_55_se/configuration/guide/scg_2960/swstpopt.html QUESTION 30 A network engineer must set the load balance method on an existing port channel. The switches do not forward these frames but use them to construct a loop-free path. except for self-looping ports. D. D. B. BPDUs contain information about the sending switch and its ports. port priority.

EtherChannel load balancing can use MAC addresses or IP addresses. You configure the load balancing and forwarding method with use of the port-channel load-balance {dst-ip | dst-mac | src-dst-ip | src-dst-mac | src-ip | src-mac} global configuration command. The mode applies to all EtherChannels that are configured on the switch. C.exam. There is a layer 1 physical issue. or both source and destination addresses.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. There is a speed mismatch on the interface. What is causing the line protocol on this interface to be shown as down? A. source or destination addresses. Reference: http://www. E. The interface is configured as the source of the SPAN session. B. There is a duplex mismatch on the interface.com/ .Explanation/Reference: Example: EtherChannel balances the traffic load across the links in a channel through the reduction of part of the binary pattern that the addresses in the frame form to a numerical value that selects one of the links in the channel.html QUESTION 31 Refer to the exhibit. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: http://www. The interface is configured as the target of the SPAN session. A network engineer investigates a recent network failure and notices that one of the interfaces on the switch is still down. D.cisco.

E. B.xml&pid=2&converted=0 QUESTION 33 Which technique allows specific VLANs to be strictly permitted by the administrator? A. Cisco Discovery Protocol version 2 Cisco IOS Embedded Event Manager logging buffered Cisco Discovery Protocol source interface Cisco Discovery Protocol logging options Correct Answer: A Section: [none] Explanation Explanation/Reference: CDP Version 1 -. C.aspx? docid=0ed03cbac49b446ab390a657917d817c_Cisco_Discovery_Protocol_CDP__Properties_Set tings_on_Sx500_S. the state of the destination port is up/down by design. This version is mainly used for backward compatibility.This is the first version of CDP which was used for the discovery of Cisco devices in the network. C. This is the normal operational state for SPAN destinations.shtml QUESTION 32 While doing network discovery using Cisco Discovery Protocol. VTP pruning transparent bridging trunk allowed VLANs VLAN access-list L2P tunneling Correct Answer: C Section: [none] http://www. The interface shows the port in this state in order to make it evident that the port is currently not usable as a production port. D. It allows you to track instances even if the native VLAN ID or port duplex states do not match between connecting devices. it is found that rapid error tracking is not currently enabled. B.This is the most recent version of CDP which has enhanced features such as rapid reporting mechanism. CDP Version 2 -.cisco. This is the default version on all switches. which is used to track down errors and minimize costly downtime. D. E.exam. Which option must be enabled to allow for enhanced reporting mechanisms using Cisco Discovery Protocol? A. Reference: http://www. Reference: http://sbkb.With the SAPN destination port.cisco.com/ .com/CiscoSB/GetArticle.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c61 2.

DTP causes increased traffic. C. Enable switchport block on access ports. preventing traffic from those VLANs from passing over the trunk.com/articles/article." This prevents the interface from generating DTP frames. You can use this command only when the interface switchport mode is access or trunk. Reference: http://www.Explanation Explanation/Reference: Explanation: By default. but may be disabled. Apply BPDU guard and BPDU filter.asp?p=2181837&seqNum=8 QUESTION 35 Which two protocols can be automatically negotiated between switches for trunking? (Choose two.com/ . To disable DTP. Which two actions can prevent interface trunking? (Choose two. configure "switchport nonegotiate. Correct Answer: AB Section: [none] Explanation Explanation/Reference: Explanation: The Dynamic Trunking Protocol (DTP) is used to negotiate forming a trunk between two Cisco devices. However.cisco. D. use the "switchport trunk allowed vlan remove vlan-list" interface configuration command to remove specific VLANs from the allowed list.1_13_ea1/confi guration/guide/swvlan. the IT manager has prohibited users from dynamically establishing trunks with their associated upstream switch.) http://www.ciscopress. and is enabled by default. You must manually configure the neighboring interface as a trunk interface to establish a trunk link. To restrict the traffic a trunk carries.html QUESTION 34 For security reasons. 1 to 4094.exam. a trunk port sends traffic to and receives traffic from all VLANs. you can remove VLANs from the allowed list. B. Disable DTP on a per interface basis.com/en/US/docs/switches/lan/catalyst3550/software/release/12.) A. Configure trunk and access interfaces manually. All VLAN IDs. Reference: http://www. otherwise the link will be a non-trunking link. are allowed on each trunk.

B. the network engineer notices that the new switch is not receiving the list of VLANs from the server.com/ . E.1Q or ISL trunking encapsulation. Reference: https://learningnetwork.exam. Which action resolves this problem? A. Correct Answer: D Section: [none] Explanation http://www.com/ A.http://www. the switchport trunk encapsulation [dot1q | isl | negotiate] interface command must be used prior to the switchport mode trunk command. After verifying all VTP settings.exam. C. F. Verify connected trunk ports. D. B.cisco. C.PDF QUESTION 36 A network is running VTPv2. Reload the VTP server. Restart the VTP process on the new switch. Reload the new switch.com/servlet/JiveServlet/previewBody/14792-102-1.57313/Dynamic%20Trunking%20Protocol. D. PPP DTP ISL HDLC DLCI DOT1Q Correct Answer: CF Section: [none] Explanation Explanation/Reference: Explanation: Switches such as the Catalyst 3550 that are capable of either 802.

Use VTP pruning on the trunk interfaces. What is the problem? A. Modify the spanning-tree priorities to dictate the traffic flow. VTP versions 1 and 2 propagate only VLANs 1 to 1005. Correct Answer: B Section: [none] Explanation Explanation/Reference: 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. Another switch in the domain has a higher revision number than the server. but it does not appear in plain text in the configuration. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing the extended LAN segment? A.2_52_se/config uration/guide/swvtp. it takes up to 4 hours propagate. you cannot convert from VTP version 3 to version 1 or 2. C. D. When you enter the secret keyword. The first thing that should be done is to verify that the trunk ports are connected and up. you can directly configure the password secret key. If extended VLANs are configured. You must reenter the password if you enter a takeover command in the domain.cisco. Instead. Support for extended range VLAN (VLANs 1006 to 4094) database propagation. Create a Layer 3 transit VLAN to segment the traffic between the sites. the secret key from the password string is saved in the VLAN database file. After each update to the VTP server. D. the key associated with the password is saved in hexadecimal format in the running configuration. E.com/ .html#wp1316856 QUESTION 38 A network engineer is extending a LAN segment between two geographically separated data centers. Reference: http://www. C. B. B.exam. The VTP server must be reloaded. a network engineer notices that none of the VTP clients are receiving the updates. VTP must be stopped and restarted on the server. http://www. When hidden. The VTP version number must be set to version 3.Explanation/Reference: Explanation: VTP should never need to have the switch reloaded or the VTP process to restart in order for it to work. QUESTION 37 After configuring new data VLANs 1020 through 1030 on the VTP server.com/en/US/docs/switches/lan/catalyst3560/software/release/12. Configure manual trunk pruning between the two locations.

Reference: https://supportforums.exam. and it avoids the use of the spanning tree. Therefore. Instead. The command effectively removed all other working VLANs and replaced them with the new VLANs. 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.pruned VLANs on a trunk are still part of the spanning tree.com/document/11836/how-define-vlans-allowed-trunk. all other existing VLANs no longer pass traffic over the trunk. the method runs the pruned VLAN on trunks. D.cisco.link QUESTION 40 When you design a switched network using VTPv2. You would also need to explicitly allow the other working VLANs to this configuration command. VTP-pruned VLANs do not reduce the number of spanning tree port instances.com/ . 1000 B.shtml QUESTION 39 The network manager has requested that several new VLANs (VLAN 10. Since the question asked for the choice that is an enhancement to the STP design.Correct Answer: C Section: [none] Explanation Explanation/Reference: 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. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: The "switchport trunk allowed vlan" command will only allow the specified VLANs.20. VTP pruning removed all unused VLANs. After the command switchport trunk allowed vlan 10. and overwrite any others that were previously defined. C.30 is issued. ISL was unable to encapsulate more than the already permitted VLANs across the trunk. VTP. What is the root cause of the problem? A. VTP pruning--Avoid this method if the goal is to reduce the number of STP instances. Reference: http://www. 20. 1001 http://www.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. and 30) are allowed to traverse the switch trunk interface. how many VLANs can be used to carry user traffic? A. Allowing additional VLANs across the trunk introduced a loop in the network.cisco. VTP pruning is the best choice. B.

with the defined native VLAN. QUESTION 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. Control traffic is tagged. B. Which protocol does the network engineer configure on both devices to accomplish this? A.com/ . D.blogspot. 1024 2048 4095 4096 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: VTP versions 1 and 2 Supports normal VLAN numbers (1-1001). E.com/2012/11/difference-between-vtp-versions. Only VTP version 3 supports extended VLANs (1-4095).exam. It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s). Reference: http://cciememo. D. It allows control traffic to pass using the non-default VLAN. including control traffic. D. B. F.html QUESTION 41 What does the command vlan dot1q tag native accomplish when configured under global configuration? A.C. C. IRDP LLDP NDP LLTD http://www. except when the native VLAN is set to 1. Cisco Discovery Protocol is not supported. so the open standard protocol must be configured. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: The "vlan dot1q tag native" will tag all untagged frames. C. All frames within the native VLAN are tagged.

link QUESTION 44 For client server failover purposes.cisco.wikipedia. all of the configured VLANs are allowed to send and receive traffic across the link. This removes specific VLANs from the allowed list. Reference: http://en. LLDP performs functions similar to several proprietary protocols. B. C.To restrict the traffic that a trunk carries.org/wiki/Link_Layer_Discovery_Protocol QUESTION 43 A manager tells the network engineer to permit only certain VLANs across a specific trunk interface. VLANs 1 through 1005 are allowed on each trunk by default. they require the switchport to enter a forwarding state immediately.com/ . Which spanningtree feature satisfies this requirement? A. For Integrated Cisco IOS Software based switches.com/document/11836/how-define-vlans-allowed-trunk. D. This keeps traffic from the VLANs from passing over the trunk link. C. However. Rapid Spanning-Tree Spanning-Tree Timers Spanning-Tree FastPort Spanning-Tree PortFast http://www. D.Correct Answer: B Section: [none] Explanation Explanation/Reference: 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. B. Note: The allowed VLAN list on both the ends of the trunk link should be the same. perform these steps: 1. VLAN traffic can be removed from the allowed list. Which option can be configured to accomplish this? A. issue the switchport trunk vlan-list interface configuration command. allowed VLAN list VTP pruning VACL L2P tunneling Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: When a trunk link is established.exam. For their disaster recovery feature to operate successfully. principally wired Ethernet. capabilities. and neighbors on an IEEE 802 local area network. the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state. such as the Cisco Discovery Protocol (CDP). Reference: https://supportforums.

E. switch# show spanning-tree vlan 10 switch# show spanning-tree bridge switch# show spanning-tree brief switch# show spanning-tree summary switch# show spanning-tree vlan 10 brief Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Command Description show spanning-tree Displays information about the spanning-tree state. the port eventually transitions into STP blocking mode. D.com/ .24 Switch-C(config-if-range)# spanning-tree portfast Reference: http://www. C. So if the port is to be a part of the loop. The port still participates in STP. enable the STP PortFast feature. PortFast immediately transitions the port into STP forwarding mode upon linkup.aspx? b=CCNP_Studies_Switching&seqNum=36 QUESTION 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 . Spanning-Tree Fast Forward Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: In order to allow immediate transition of the port into forwarding state.exam.com/library/content. E. Example output: SW2#show spanning-tree vlan 10 VLAN0010 http://www.informit. B.

cisco. VLANs. a switch will have a domain name of NULL and no password.Po21 Root FWD 9 128.exam. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: By default. which statement describes what happens when a domain name is configured on one of the switches? A.---.f2d2. and the configuration revision number. C.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.Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014.9000 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio. Contained in a summary advertisement: VTP version Domain name Configuration revision number Time stamp MD5 encryption hash code http://www. Summary advertisements sent out every 300 seconds and every time a change occurs on the VLAN database.html QUESTION 46 A new network that consists of several switches has been connected together via trunking interfaces.--------. D.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2.57d8.--------------------------.216 P2p Po23 Altn BLK 9 128.Nbr Type ------------------. All other switches with the default domain name become VTP clients. If the switch hears a VTP advertisement it will automatically learn the VTP domain name.--. VTP summary advertisements are sent out of all ports with the new domain name.232 P2p Reference: http://www. B.-------. If all switches currently have the default VTP domain name "null". The switch with the non-default domain name restores back to "null" upon reboot. Switches with higher revision numbers does not accept the new domain name.com/ .

http://www.net/configuring-cisco-vtp/ QUESTION 47 A network engineer is setting up a new switched network. featuring an access Switch A. C.dionicio.1w RST algorithm to multiple spanning trees. there are 1000 VLANs. Figure 3-15 shows a common network design. In this setup. E. 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. D. B. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies. connected to two Building Distribution submodule Switches D1 and D2.Reference: https://rowell. uses a minimum number of STP instances to match the number of physical topologies present. MST.com/ . 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. Which Spanning Tree Protocol should be used to reduce switch resources and managerial burdens that are associated with multiple spanning-tree instances? A. RSTP PVST MST PVST+ RPVST+ Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Multiple Spanning Tree (MST) extends the IEEE 802. on the other hand.exam. The network is expected to grow and add many new VLANs in the future.

exam.com/2011/05/chapter-03-implementing-spanning. C. E. You can select a template to provide maximum system usage for some functions. the switch SDM templates prioritize system resources to optimize support for certain features. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: You can use SDM templates to configure system resources in the switch to optimize support for specific features.Figure 3-15: VLAN Load Balancing Figure 3-15 illustrates two links and 1000 VLANs. each switch needs to maintain only two spanning trees.html QUESTION 48 Which statement about the use of SDM templates in a Cisco switch is true? A. use the default template to balance resources. B.blogspot. depending on how the switch is used in the network. 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. 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. Reference: http://ciscodocuments. SDM templates are used to configure ACLs that protect networks and specific hosts from unnecessary or unwanted traffic. and use access template to obtain maximum ACL usage.tree_19. SDM templates are configured by accessing the switch using the web interface. http://www. SDM templates are used to configure system resources in the switch to optimize support for specific features. To allocate hardware resources for different usages. Rather than maintaining 1000 spanning trees. for example.com/ . reducing the need for switch resources. depending on how the switch is used in the network. D. The 1000 VLANs map to two MST instances.

pdf QUESTION 49 Which SDM template disables routing and supports the maximum number of unicast MAC addresses? A.cisco. C.Reference: http://www. typically required for a router or aggregator in the center of a network. D.exam. VLANs--The VLAN template disables routing and supports the maximum number of unicast MAC addresses. You can select SDM templates to optimize these features: Access--The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs.com/ . D. B. B.pdf QUESTION 50 Which SDM template is the most appropriate for a Layer 2 switch that provides connectivity to a large number of clients? A.com/en/US/docs/switches/lan/catalyst3560/software/release/12. Reference: http://www.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12. the switch SDM templates prioritize system resources to optimize support for certain features. VLAN access default routing Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages. Default--The default template gives balance to all functions.2_55_s e/configuration/guide/swsdm. Routing--The routing template maximizes system resources for IPv4 unicast routing.cisco. VLAN default access routing Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: http://www. It would typically be selected for a Layer 2 switch.2_55_se/config uration/guide/swsdm. C.

VLANs--The VLAN template disables routing and supports the maximum number of unicast MAC addresses (clients). the default is 300 seconds.dress-table aging-time carded from the MAC address table.cisco. what is the default period of time after which a MAC address ages out and is discarded? A.exam. minal Step 2 switch(config)# mac-ad. Reference: http://www. D. typically required for a router or aggregator in the center of a network. The range is from seconds [vlan vlan_id] 0 to 1000000. Default--The default template gives balance to all functions. Reference: http://www. the aging specification applies to all VLANs. Entering the value 0 disables the MAC aging. Routing--The routing template maximizes system resources for IPv4 unicast routing. It would typically be selected for a Layer 2 switch.com/ . when is a syslog message generated? A. If a VLAN is not specified. perform this task: Command Purpose Step 1 switch# configure ter.pdf QUESTION 51 In a Cisco switch. B.cisco. 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.To allocate ternary content addressable memory (TCAM) resources for different usages.html QUESTION 52 If a network engineer applies the command mac-address-table notification mac-move on a Cisco switch port.com/en/US/docs/switches/lan/catalyst3560/software/release/12. 100 seconds 180 seconds 300 seconds 600 seconds Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: To configure the aging time for all MAC addresses.Enters configuration mode. http://www.Specifies the time before an entry ages out and is dis.2_55_se/config uration/guide/swsdm. C. the switch SDM templates prioritize system resources to optimize support for certain features.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/M ACAddress. A MAC address or host moves between different switch ports.

The reason can be: Duplex mismatch http://www. Reference: http://www. C. C. A new MAC address is removed from the content-addressable memory.com/en/US/docs/ios/lanswitch/command/reference/lsw_m1. D. More than 64 MAC addresses are added to the content-addressable memory. Usage Guidelines MAC-move notification generates a syslog message whenever a MAC address or host moves between different switch ports.html QUESTION 53 Which option is a possible cause for an errdisabled interface? A.B. 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. A new MAC address is added to the content-addressable memory.mand in global configuration mode.cisco. B. D. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: mac-address-table notification mac-move To enable MAC-move notification. use the no form of this command. syslog (Optional) Specifies the syslogging facility when the MAC-move notification detects the first instance of the MAC move.exam. use the mac-address-table notification mac-move com.com/ . routing loop cable unplugged STP loop guard security violation Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: There are various reasons for the interface to go into errdisable. To disable MAC-move notification.

Port channel misconfiguration
BPDU guard violation
UniDirectional Link Detection (UDLD) condition
Late-collision detection
Link-flap detection
Security violation
Port Aggregation Protocol (PAgP) flap
Layer 2 Tunneling Protocol (L2TP) guard
DHCP snooping rate-limit
Incorrect GBIC / Small Form-Factor Pluggable (SFP) module or cable Address Resolution Protocol (ARP) inspection
Inline power
Reference:
http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.shtml
QUESTION 54
What is the default value for the errdisable recovery interval in a Cisco switch?
A.
B.
C.
D.

30 seconds
100 seconds
300 seconds
600 seconds

Correct Answer: C
Section: [none]
Explanation
Explanation/Reference:
Explanation:
After you fix the root problem, the ports are still disabled if you have not configured errdisable recovery on the switch. In this case, you must reenable the ports
manually. Issue the shutdown command and then the no shutdown interface mode command on the associated interface in order to manually reenable the ports.

http://www.exam.com/

The errdisable recovery command allows you to choose the type of errors that automatically reenable the ports after a specified amount of time. The show
errdisable recovery command shows the default error-disable recovery state for all the possible conditions.
cat6knative#show errdisable recovery
ErrDisable Reason Timer Status
----------------- -------------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, by default, the timeout feature is disabled.
Reference:
http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.shtml
QUESTION 55
Which statement about LLDP-MED is true?
A.
B.
C.
D.

LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices.
LLDP-MED is an extension to LLDP that operates only between network devices.
LLDP-MED is an extension to LLDP that operates only between endpoint devices.
LLDP-MED is an extension to LLDP that operates between routers that run BGP.

Correct Answer: A
Section: [none]
Explanation
Explanation/Reference:
Explanation:

http://www.exam.com/

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. It specifically provides support for voice over IP (VoIP) applications and provides additional TLVs for capabilities discovery, network policy, Power over
Ethernet, and inventory management.
Reference:
http://www.cisco.com/en/US/docs/switches/metro/me3400/software/release/12.2_58_se/configur ation/guide/swlldp.pdf
QUESTION 56
Which statement about Cisco devices learning about each other through Cisco Discovery Protocol is true?
A.
B.
C.
D.

Each device sends periodic advertisements to multicast address 01:00:0C:CC:CC:CC.
Each device broadcasts periodic advertisements to all of its neighbors.
Each device sends periodic advertisements to a central device that builds the network topology.
Each device sends periodic advertisements to all IP addresses in its ARP table.

Correct Answer: A
Section: [none]
Explanation
Explanation/Reference:
Explanation:
Cisco devices send periodic CDP announcements to the multicast destination address 01-00-0c- cc-cc-cc, out each connected network interface. These multicast
packets may be received by Cisco switches and other networking devices that support CDP into their connected network interface.
Reference: http://network.spravcesite.net/subdom/network/index.php?id=cdp
QUESTION 57
Which option lists the information that is contained in a Cisco Discovery Protocol advertisement?
A.
B.
C.
D.

native VLAN IDs, port-duplex, hardware platform
native VLAN IDs, port-duplex, memory errors
native VLAN IDs, memory errors, hardware platform
port-duplex, hardware platform, memory errors

Correct Answer: A
Section: [none]
Explanation
Explanation/Reference:
Explanation:
Type-Length-Value fields (TLVs) are blocks of information embedded in CDP advertisements. Table 21 summarizes the TLV definitions for CDP advertisements.
Table 21 Type-Length-Value Definitions for CDPv2
http://www.exam.com/

TLV Definition
Device-ID TLV Identifies the device name in the form of a character string.
Address TLV Contains a list of network addresses of both receiving and sending devices.
Port-ID TLV Identifies the port on which the CDP packet is sent.
Capabilities TLV Describes the functional capability for the device in the form of a de- vice type, for example, a switch.
Version TLV Contains information about the software release version on which the device is running.
Platform TLV Describes the hardware platform name of the device, for example, Cisco 4500.
IP Network Prefix Contains a list of network prefixes to which the sending device can TLV forward IP packets. This information is in the form of the interface
protocol and port number, for example, Eth 1/0.
VTP Management Advertises the system's configured VTP management domain name- Domain TLV string. Used by network operators to verify VTP domain
configuration in adjacent network nodes.
Native VLAN TLV Indicates, per interface, the assumed VLAN for untagged packets on the interface. CDP learns the native VLAN for an interface. This fea- ture is
implemented only for interfaces that support the IEEE 802.1Q protocol.
Full/Half Duplex Indicates status (duplex configuration) of CDP broadcast interface. TLV Used by network operators to diagnose connectivity problems be- tween
adjacent network elements.
Reference:
http://www.cisco.com/en/US/docs/ios/12_2/configfun/configuration/guide/fcf015.html
QUESTION 58
Which option describes a limitation of LLDP?
A.
B.
C.
D.

LLDP cannot provide information about VTP.
LLDP does not support TLVs.
LLDP can discover only Windows servers.
LLDP can discover up to two devices per port.

Correct Answer: A
Section: [none]
Explanation

http://www.exam.com/

and neighbors on a local area network.cisco.No MTU TLV port-Specifies the size of the MTU External port support-Used to identify the card No External Port-ID terminating the fiber in the case of wave. and neighbors on a local area network. B. capabilities.html QUESTION 59 Which statement about the UDLD protocol is true? A. capabilities. UDLD is a standardized Layer 2 protocol that enables devices to advertise their identity. C.Explanation/Reference: Explanation: LLDP Versus Cisco Discovery Protocol TLV Comparison Function Description LLDP TLV Cisco Discovery Protocol TLV IP network prefix support-Used to send the net.No IP Network Prefix work prefix and used for ODR TLV Hello piggybacking-Can be used to piggy back No Protocol Hello TLV hello messages from other protocols Maximum-transmission-unit (MTU) sup.TLV length-division multiplexing (WDM) VTP management support No VTP Management Domain TLV Port unidirectional mode-Used in fiber. where No Port UniDirectional the connection may be unidirectional Mode TLV Management address Management Ad.exam. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to advertise their identity. D.com/ .Management-Address TLV dressTLV Allows for organizational unique TLVs Yes No Reference: http://www.com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd804c d46d. Correct Answer: A Section: [none] Explanation http://www. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. UDLD is a standardized Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures.

UDLD can operate in either normal or aggressive mode. When a unidirectional link is detected. D.html QUESTION 61 What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements? http://www.cisco. UDLD detects the existence of unidirectional links.Explanation/Reference: Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD.exam. normal and aggressive active and aggressive normal and active normal and passive normal and standby Correct Answer: A Section: [none] Explanation Explanation/Reference: 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. UDLD puts the affected port into the errdisabled state and alerts the user.com/ . E. C.2SX/configuration/guide/udl d.html QUESTION 60 Which option lists the modes that are available for configuring UDLD on a Cisco switch? A.2SX/configuration/guide/udl d.cisco. UDLD puts the affected port into the errdisabled state and alerts the user. UDLD detects the existence of unidirectional links. B.exam. Reference: http://www.com/ http://www. When a unidirectional link is detected. Reference: http://www.com/en/US/docs/switches/lan/catalyst6500/ios/12.

Advertisements contain time-to-live information. Reference: http://www. every 60 seconds. CDP is enabled by default and can be disabled globally with the command no cdp run. by default. D.html#wp10175 QUESTION 63 Which VTP mode is needed to configure an extended VLAN. Reference: http://www. B. 30 seconds 60 seconds 120 seconds 300 seconds Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: Cisco Discovery Protocol is a Layer 2. To disable CDP on an interface. Devices discover each other by listening at that address.discover. CDP also is enabled on supported interfaces by default. Cisco Discovery Protocol is enabled by default. D. C. C.com/en/US/docs/iosxml/ios/cdp/configuration/15-mt/nm-cdp. CDP is disabled by default and can be enabled globally with the command cdp run. Advertisements supported and configured in Cisco software are sent. CDP is disabled by default and can be enabled globally with the command cdp enable. 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. To disable it globally. use the "no cdp run" command. CDP is enabled by default and can be disabled globally with the command no cdp enable.A. media-independent. directly connected devices. They also listen to messages to learn when interfaces on other devices are up or go down. which means the Cisco IOS software will receive CDP information. when a switch is configured to use VTP versions 1 or 2? http://www.com/en/US/docs/ios/12_2/configfun/command/reference/frf015. use the "no cdp enable interface" configuration command. and network-independent protocol that networking applications use to learn about nearby. which indicates the length of time a receiving device should hold Cisco Discovery Protocol information before discarding it.exam. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: CDP is enabled on your router by default.cisco.cisco.com/ .html QUESTION 62 Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true? A. B.

2SX/configuration/guide/vtp. The hexadecimal values of 0x000 and 0xFFF are reserved.cisco. B. If converting from VTP version 3 to VTP version 2. Extended-range VLANs are supported only in VTP version 3.org/wiki/IEEE_802.exam.094 VLANs Reference: http://en. Reference: http://www. D. C. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: VTP version 1 and version 2 support VLANs 1 to 1000 only.A. All other values may be used as VLAN identifiers. D. B.1Q QUESTION 65 What is the maximum number of VLANs that can be assigned to an access switchport without a voice VLAN? http://www. html QUESTION 64 What is the size of the VLAN field inside an 802.com/ .com/en/US/docs/switches/lan/catalyst6500/ios/12. VLANs in the range 1006 to 4094 are removed from VTP control. allowing up to 4. C. 8-bit 12-bit 16-bit 32-bit Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: The VLAN field is a 12-bit field specifying the VLAN to which the frame belongs.wikipedia.1q frame? A. transparent client server Extended VLANs are only supported in version 3 and not in versions 1 or 2.

QUESTION 66 Refer to the exhibit.A. the port should be configured as a trunk port.exam. B. 0 1 2 1024 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: A standard (non-voice VLAN port) access switch port can belong to only a single VLAN. C. D. Which option shows the expected result if a show vlan command is issued? http://www. If more than one VLAN is needed.com/ .

http://www. B.exam.A. C.com/ .

Exhibit B C.exam. Obviously.com/ . D. C. Exhibit C D. the port has been configured both as a trunk and as a switchport in data vlan 10. QUESTION 67 Which feature is automatically enabled when a voice VLAN is configured. so even though Cisco IOS will accept both. portfast port-security spanning tree storm control Correct Answer: A Section: [none] Explanation http://www. a port can not be both. the port will actually be used as a trunk. ignoring the switchport access VLAN 10 command. A. Exhibit A B. but not automatically disabled when a voice VLAN is removed? A. Exhibit D Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: In this case.D. B.

the Port Fast feature is not automatically disabled. Reference: http://www.1q header found? A. 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. Instead.com/ . C.wikipedia. The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN. within the Ethernet header within the Ethernet payload within the Ethernet FCS within the Ethernet source MAC address Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Frame format Insertion of 802.1Q does not encapsulate the original frame. for Ethernet frames. B.html QUESTION 68 In which portion of the frame is the 802. it adds a 32-bit field between the source MAC address and the EtherType/length fields of the original frame Reference: http://en.org/wiki/IEEE_802.cisco.1Q tag in an Ethernet frame 802.Explanation/Reference: Explanation: Voice VLAN Configuration Guidelines You should configure voice VLAN on switch access ports.exam. When you disable voice VLAN.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_22_ea11x/co nfiguration/guide/swvoip.1Q QUESTION 69 Which VLAN range is eligible to be pruned when a network engineer enables VTP pruning on a switch? http://www. D.

html#vtp_pruning QUESTION 71 Refer to the exhibit.A. D. VTP pruning port-security storm control bpdguard Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: VTP ensures that all switches in the VTP domain are aware of all VLANs.exam. VLANs 2 1001 are pruning eligible. C.com/VTP-Pruning. B.php QUESTION 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.21. B. However. Reference: http://www. All switches in the network receive all broadcasts. there are occasions when VTP can create unnecessary traffic. D. VLANs 1-1001 VLANs 1-4094 VLANs 2-1001 VLANs 2-4094 Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: VTP pruning should only be enabled on VTP servers.cisco. C.com/ . Reference: http://www. but VLAN 1 can't be pruned because it's an administrative VLAN. even in situations in which few users are connected in that VLAN. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic.orbit-computer-solutions. By default.com/c/en/us/ support/docs/lan-switching/vtp/10558. All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN. Both VTP versions 1 and 2 supports pruning. http://www. all the clients in the VTP domain will automatically enable VTP pruning.

1Q trunking to pass this new VLAN along to the other switches. B.com/ . Disable VTP pruning and disable 802. Update the VTP revision number. Then.The users in an engineering department that connect to the same access switch cannot access the network. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Only VTP servers can add new VLANs to the switched network. Enable VTP pruning and disable 802. Which action resolves this problem? A. The network engineer found that the engineering VLAN is missing from the database.1q.1q. D. you will need to enable 802. C. Change VTP mode to server and enable 802.exam. QUESTION 72 Refer to the exhibit.1q. http://www. so to enable vlan 10 on this switch you will first need to change the VTP mode from client to server.

The network switches for two companies have been connected and manually configured for the required VLANs. but users in company A are not able to access network resources in company B when DTP is enabled. C. Which action resolves this problem? A. http://www.exam.com/ . B.dat and ensure that the switch with lowest MAC address is the VTP server. Disable DTP and document the VTP domain mismatch. Manually force trunking with switchport mode trunk on both switches. Delete vlan.

B. B. but version 1 does not. Consider that this is a multivendor environment. QUESTION 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. http://www. 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. only 802. Cisco Discovery Protocol version 2 carries native VLAN information. There are 2 different methods for trunking. C. Which Cisco IOS switching feature can be used to achieve the task? A. QUESTION 74 Which statement about using native VLANs to carry untagged frames is true? A. Cisco Discovery Protocol version 1 carries native VLAN information.com/ .exam. Cisco Discovery Protocol version 3 carries native VLAN information. but version 2 does not.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol.D. C. Cisco Discovery Protocol version 1 and version 2 carry native VLAN information. D.1Q and ISL. Correct Answer: C Section: [none] Explanation Explanation/Reference: 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. D. but versions 1 and 2 do not. Of these. 802. The VTP domain names do match and they are both VTP servers so there are no issues there. PPP encapsulation with a virtual template Link Aggregation Protocol at the access layer dot1q VLAN trunking Inter-Switch Link Correct Answer: C Section: [none] Explanation Explanation/Reference: 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. Enable the company B switch with the vtp mode server command.

ciscopress. 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.com/articles/article. If spanning tree detects a native VLAN mismatch. Reference: http://www.aspx? http://www. you will see CDP error messages on the console output. VLAN 2013 on the multilayer switch is configured as the native VLAN. VLAN ID 1 should not be used for management traffic because its unsafe. not via DTP messages. Native VLAN mismatches are detected via spanning tree and Cisco Discovery Protocol (CDP). spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on the trunk. both with native VLAN mismatch. Which option is the cause of the spanning-tree error? A. spanning-tree bpdu-filter is enabled. you must ensure that you choose a common native VLAN for each port in the trunk. Reference: http://www.1q trunks are on both sides.com/library/content. C. A multilayer switch has been configured to send and receive encapsulated and tagged frames.exam. however. If you have a native VLAN mismatch. but 1 (the default native VLAN) on the other switch.asp?p=29803&seqNum=3 QUESTION 75 Refer to the exhibit. B. 802. the trunk still remains up for other VLANs.com/ . If you use 802.informit.1Q trunks. D.Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Cisco Discovery Protocol (CDP) version 2 passes native VLAN information between Cisco switches. VLAN spanning-tree in SW-2 is configured. Correct Answer: C Section: [none] Explanation Explanation/Reference: Here we see that the native VLAN has been configured as 2013 on one switch.

exam. The "trunk pruning vlan 1" option is not a valid command. Reference: http://www.cisco. C. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning.b=CCNP_Studies_Switching&seqNum=25 QUESTION 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. VTP pruning access list switchport trunk allowed VLAN VLAN access-map Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Cisco advocates the benefits of pruning VLANs in order to reduce unnecessary frame flooding.html QUESTION 77 Which action allows a network engineer to limit a default VLAN from being propagated across all trunks? A. C. The "vtp pruning" command prunes VLANs automatically. which stops the inefficient flooding of frames where they are not needed. Manually prune default VLAN with switchport trunk allowed vlans remove. Upgrade to VTP version 3 for advanced feature set support. D. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Manaully pruning the default VLAN (1) can only be done with the "switchport trunk allowed vlans remove" command. Use trunk pruning vlan 1. Enable VTP pruning on the VTP server.switches/24330-185. QUESTION 78 http://www.com/c/en/us/support/docs/switches/catalyst-6500-series. B. D. Which Cisco IOS feature can be used to achieve this task? A. B.com/ .

4-bytes except the native VLAN 8-bytes except the native VLAN 4-bytes including native VLAN 8-bytes including native VLAN Correct Answer: A Section: [none] Explanation Explanation/Reference: http://www. C. D. D.com/en/US/docs/switches/lan/catalyst3550/software/release/12.html QUESTION 79 Refer to the exhibit.1q Q-in-Q encapsulation? A.cisco. C. How many bytes are added to each frame as a result of the configuration? A.exam.1Q tunneling (Q-in-Q) feature increases the frame size by 4 bytes when the extra tag is added. B.1_13_ea1/confi guration/guide/swtunnel. you must configure all switches in the service-provider network to be able to process maximum frames by increasing the switch system MTU size to at least 1504 bytes. Because the 802.com/ . B. Support less than 1500 MTU Support 1504 MTU or higher Support 1522 layer 3 IP and IPX packet Support 1547 MTU only Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: The default system MTU for traffic on Catalyst switches is 1500 bytes.What is required for a LAN switch to support 802. Explanation: http://www.

D. Two bytes are used for the tag protocol identifier (TPID).cisco. and on-on allow the formation of a channel. desirable.desirable. desirable. The valid range is from 1 to 65535. LACP traffic goes through G0/4 because it is the highest interface ID. Which action allows interface G0/1 to always actively forward traffic in the port-channel? A. G0/2. C. Only the combinations auto-auto.exam. Configure G0/1 as half duplex and G0/2 as full duplex. desirable. auto.1Q trunking. G0/3. PAgP modes are active. D. and on-on allow the formation of a channel. desirable. the lower the priority. LACP uses the port priority with the port number to form the port identifier. all VLAN packets are tagged on the trunk link. and G0/4 between two switches using Ethernet port-channel.com/ . Only the combinations active-active.html#wp1081491 QUESTION 81 Which statement about the use of PAgP link aggregation on a Cisco switch that is running Cisco IOS Software is true? A. C. and on. desirable. The default is 32768. Only the combinations active-desirable.desirable. PAgP modes are active. desirable. desirable. auto. QUESTION 80 A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1. A VLAN tag adds 4 bytes to the frame. Only the combinations auto-desirable. and on-on will allow a channel to be formed. Only the combinations 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. except the native VLAN. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: A LACP port priority is configured on each port using LACP. PAgP modes are off. The port priority can be configured automatically or through the CLI. and on-on allow the formation of a channel. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: PAgP modes are off. B. desirable. and on. Configure LACP port-priority on G0/1 to 65535.com/c/en/us/td/docs/ios/12_2sb/feature/guide/gigeth. The higher the number. desirable.desirable. and on. and on-on allow the formation of a channel. B. active. and on. desirable. PAgP modes are off.desirable. and on. http://www. Configure LACP port-priority on G0/1 to 1.Explanation: In 802. the other two bytes for tag control information (TCI). Reference: http://www.desirable.

3.com/c/en/us/support/docs/switches/catalyst-2900-xl-series. The formation of a channel is desired. it is not initiated. 1.com/ . off: PAgP will not run. and on-on will allow a channel to be formed. 4. The channel is forced to come up. Reference: http://www. http://www. Only the combinations of auto-desirable. such as a router.html QUESTION 82 Refer to the exhibit. The formation of a channel is desired and ini. on: PAgP will not run. 2. If a device on one side of the channel does not support PAgP.tiated. auto: PAgP is running passively. however.switches/21041-131. desirable-desirable.The PAgP modes are explained below. the device on the other side must have PAgP set to on. The channel is forced to remain down.exam. desirable: PAgP is running actively.cisco.

Which EtherChannel negotiation protocol is configured on the interface f0/13 f0/15? A.com/ . Port Combination Protocol http://www. Link Combination Control Protocol B. Port Aggregation Protocol C.exam.

which is operating in desirable mode. 2. The formation of a channel is desired. Only the combinations auto-desirable. http://www. .desirable. The channel is forced to remain down. it is not initiated. and on-on will allow a channel to be formed. QUESTION 83 Refer to the exhibit. The peer (in active state) initiates negotiation (when it sends out an LACP packet) which we receive and answer. This is similar to the off state for PAgP. This is similar to the desir. and fa0/15 are all in Port Channel 12.able mode of PAgP.In other words. which is only a PAgP mode. The link aggregate is formed if the other end runs in LACP active or passive mode. 1. eventually to form the aggregation channel with the peer. Passive: The switch does not initiate the channel but does understand inbound LACP packets. off: PAgP will not run. and on. This is similar to the on state for PAgP. Link Aggregation Control Protocol Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: PAgP modes are off. The Link Aggregate Control Protocol (LACP) trunking supports four modes of operation: On: The link aggregation is forced to be formed without any LACP negotiation . 3.D. desirable: PAgP is running actively. This is similar to the auto mode in PAgP. desirable. In this example. however.com/ . auto. The formation of a channel is desired and ini. auto: PAgP is running passively. Active: We can form an aggregate link and initiate the negotiation. fa0/14. 4.exam. We do not send or understand the LACP packet. Off: The link aggregation is not formed. desirable. we see that fa 0/13. on: PAgP will not run. the switch neither sends the LACP packet nor processes any inbound LACP packet. The channel is forced to come up.tiated.

PAgP does not change the port speed and duplex for all ports in the bundle until the switch is rebooted. To increase bandwidth. Contact Cisco TAC to report a bug on the switch. B. PAgP changes the port speed but not the duplex for all ports in the bundle. Upgrade the switch IOS to IP services image. The load balancing method should be changed to destination MAC. C. Correct Answer: A Section: [none] Explanation http://www. QUESTION 84 A network engineer changed the port speed and duplex setting of an existing EtherChannel bundle that uses the PAgP protocol. Change the load-balance method to dst-mac. since the web server has two NICs traffic will be load balanced across both MAC addresses. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Since this traffic is coming from PC-1. Which action can the engineer take to resolve this issue? A. PAgP drops the ports that do not match the configuration. Disable EtherChannel load balancing. traffic is still slow. D.Users of PC-1 experience slow connection when a webpage is requested from the server. C. PAgP changes the port speed and duplex for all ports in the bundle. and since the load balancing method is source MAC. the network engineer configured an EtherChannel on interfaces Fa1/0 and Fa0/1 of the server farm switch. 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# However.com/ . D.exam. Which statement describes what happens to all ports in the bundle? A. traffic will only be using one of the port channel links. the source MAC address will always be that of PC-1. B.

Reference: http://www. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 16 Gbps only for Gigabit EtherChannel. Each EtherChannel can consist of up to eight compatibly configured Ethernet interfaces. 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.cisco. C. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. such as a router. All interfaces in each EtherChannel must be the same speed.html QUESTION 85 Which statement about using EtherChannel on Cisco IOS switches is true? A.com/ .html QUESTION 86 Refer to the exhibit. auto. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel.cisco. PAgP packets are sent between EtherChannel-capable ports in order to negotiate the formation of a channel. desirable. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. Some restrictions are deliberately introduced into PAgP.desirable. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. PAgP modes are off.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4.exam. 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.com/c/ en/us/support/docs/lan-switching/etherchannel/12023-4. desirable. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: An EtherChannel consists of individual Fast Ethernet or Gigabit Ethernet links bundled into a single logical link. PAgP changes the port speed and duplex for all ports in the bundle. PAgP requires that all ports in the channel belong to the same VLAN or are configured as trunk ports. B. 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. Reference: http://www. all ports in the bundle are modified to match that VLAN. PAgP does not group ports that operate at different speeds or port duplex. http://www. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 10 Gbps only for Gigabit EtherChannel. and on. D. If speed and duplex change when a bundle exists. and all must be configured as either Layer 2 or Layer 3 interfaces. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. When a bundle already exists and a VLAN of a port is modified.Explanation/Reference: Explanation: PAgP aids in the automatic creation of EtherChannel links. 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.

and Fa0/15 successfully formed a Layer 3 port-channel interface using a Cisco proprietary protocol. Correct Answer: A Section: [none] Explanation http://www. and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol. D. and Fa0/15 successfully formed a Layer 2 physical port-channel interface using a Cisco proprietary protocol. Physical port Fa0/13. Fa0/14. Fa0/14. Physical port Fa0/13. Logical port Fa0/13.exam. Logical port Fa0/13. Fa0/14.com/ .Which statement about switch S1 is true? A. B. Fa0/14. and Fa0/15 successfully formed a Layer 3 physical port-channel interface using an open standard protocol. C.

C.1d does not understand RSTP BPDUs because they are different versions.1d BPDU? A. it does not respond with a 802.1d understands RSTP BPDUs because they are the same version.1d BPDU. When a port is initialized.com/ .1d does not understand RSTP BPDUs because they are different versions.1d BPDU. what is the total number of spanning-tree instances running on the switch? A. but when a RSTP switch receives an 802. it responds with a 802. 802.1d BPDU and eventually the two switches run 802. it responds with an 802. C. B. However. if the RSTP switch is using 802. and RSTP BPDUs are sent. 1 2 3 4 Correct Answer: C Section: [none] http://www. it assumes that it is connected to an 802. B. The protocol used for this port channel shows as LACP.2SX/configuration/guide/book/spantree. and the (SU) means they are in use and operating at layer 2. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: For backward compatibility with 802. 802.1d to communicate.1D BPDU after the port migration-delay timer has expired. the migrate-delay timer is started (specifies the minimum time during which RSTP BPDUs are sent).1D BPDUs.1d to communicate.1d BPDU.1d BPDU and eventually the two switches run 802.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. Reference: http://www. If the switch receives an 802. D. as opposed to PAgP. the switch processes all BPDUs received on that port and ignores the protocol type.1D switch and starts using only 802.1d to communicate.cisco. which is Cisco proprietary. D. it does not respond with a 802.Explanation/Reference: Explanation: These three ports show that they are in Port Channel 1.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired.html QUESTION 88 When two MST instances (MST 1 and MST 2) are created on a switch.1d understands RSTP BPDUs because they are the same version. 802.1D switches.1d BPDU. but when a RSTP switch receives a 802.1D configuration BPDUs and TCN BPDUs on a per-port basis. it restarts the timer and starts using RSTP BPDUs on that port. 802.1d BPDU.exam. which is a standards based protocol. QUESTION 87 What happens on a Cisco switch that runs Cisco IOS when an RSTP-configured switch receives 802.1d BPDU and eventually the two switches run 802. RSTP selectively sends 802. but when a RSTP switch receives a 802. but when a RSTP switch receives a 802. While this timer is active.

for a total of 3 instances. A CIST is a collection of the ISTs in each MST region. http://www. but each MST in. Instance 0 is a special instance for a region. even if regions A and B are interconnected. all VLANs are assigned to the IST. MST instance 1 in region A is independent of MST instance 1 in region B.cantly reduced. the number of BPDUs that need to be processed to support multiple spanning tree instances is signifi. and the special 0 instance.exam. Because the MST BPDU carries information for all instances.com/ . An MST instance is local to the region. which are encapsu.stance has its own topology parameters. All of the other span. MST maintains multiple spanning tree instances. By default.html QUESTION 89 Refer to the exhibit. In the case for this question. All MST instances within the same region share the same protocol timers. The CST interconnects the MST regions and single spanning trees.ning tree instance information is contained in MSTP records (Mrecords). CIST.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. MST establishes and maintains IST. root path cost.2SX/configuration/guide/book/spantree. and so forth.Explanation Explanation/Reference: Explanation: Unlike other spanning tree protocols. in which all the spanning tree instances are independent. and CST spanning trees: An IST is the spanning tree that runs in an MST region. Reference: http://www. there will be the 2 defined MST instances. Within each MST region. All other MST instances are numbered from 1 to 4094.cisco. for example.lated within MST BPDUs. The IST is the only spanning tree instance that sends and receives BPDUs. such as root bridge ID. known as the IST.

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 SW2 f1/1 to 0 and f1/0 to 16. D. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16. Correct Answer: C Section: [none] Explanation Explanation/Reference: http://www.f1/0 and f1/1 have the same end-to-end path cost to the designated bridge.exam.com/ . B. Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0. 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.

The bridge priority is 1 and all ports are forwarding. STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports. STP considers port priority when selecting a LAN port to put into the forwarding state. Reference: http://www. Why would the switch be considered as a root bridge? A.1_9_ea1/config uration/guide/swstp. A lower path cost represents higher-speed transmission and is preferred. The possible priority range is 0 through 240 (default 128). http://www. configurable in increments of 16.com/en/US/docs/switches/lan/catalyst2950/software/release/12.com/ . If all LAN ports have the same priority value.html#wp1105354 QUESTION 90 Refer to the exhibit.cisco.exam.Explanation: If a loop occurs. You can assign higher priority values to LAN ports that you want STP to select first and lower priority values to LAN ports that you want STP to select last.

B. The switch priority for VLAN 1 and the macro specifies "This Bridge is the root".
C. The bridge priority is 128.19 and all ports are forwarding.
D. The switch priority value is zero, it has the lowest priority value for VLAN 1.
Correct Answer: D
Section: [none]
Explanation
Explanation/Reference:
Explanation:
For priority, the range is 0 to 61440 in increments of 4096; the default is 32768. The lower the number, the more likely the switch will be chosen as the root switch.
Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_9_ea1/config uration/guide/swstp.html#wp1020666
QUESTION 91
Refer to the exhibit.

All ports are members of VLAN 10. Considering the default cost of upstream bridges to the root bridge is equal, which option will be the new root port for VLAN 10?
A. interface f0/13

http://www.exam.com/

B. interface f0/14
C. interface f0/15
D. interface f0/21
Correct Answer: D
Section: [none]
Explanation
Explanation/Reference:
Explanation:
Root Port election on each bridge
Each (non-Root) bridge has exactly one Root Port, which represents the best path to the Root Bridge.
Total Path Cost to root - lowest prevails (local Root Port cost added o
upon receipt of Configuration BPDUs on that port, from the direction of Root Bridge)
Connected Bridge ID - lowest prevails
o
Connected Port ID (Port Priority + Port#) - lowest prevails o
Local Port ID - lowest prevails
o
In this case, fa0/21 has the lowest cost, so it will be the root port.
Reference:
https://community.extremenetworks.com/extreme/topics/802_1d_spanning_tree_election_rules
QUESTION 92
A network engineer is trying to deploy a PC on a network. The engineer observes that when the PC is connected to the network, it takes 30 to 60 seconds for the
PC to see any activity on the network interface card. Which Layer 2 enhancement can be used to eliminate this delay?
A.
B.
C.
D.

Configure port duplex and speed to auto negotiation.
Configure port to duplex full and speed 1000.
Configure spanning-tree portfast.
Configure no switchport.

Correct Answer: C
Section: [none]
Explanation
Explanation/Reference:
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

http://www.exam.com/

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 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.
B.
C.
D.

If an interface is enabled for portfast receives BDPU, the port goes through the spanning-tree listening, learning, and forwarding states.
If an interface is enabled for portfast receives BDPU, the port does not go through the spanning-tree listening, learning, and forwarding states.
If an interface is enabled for portfast receives BDPU, the port is shut down immediately.
If an interface is enabled for portfast receives BDPU, the port goes into the spanning-tree inconsistent state.

Correct Answer: A
Section: [none]
Explanation
Explanation/Reference:
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 94
Which statement describes what happens when a port configured with root guard receives a superior BPDU?
A.
B.
C.
D.

The port goes into errdisabled state and stops forwarding traffic.
The port goes into BPDU-inconsistent state and stops forwarding traffic.
The port goes into loop-inconsistent state and stops forwarding traffic.
The port goes into root-inconsistent state and stops forwarding traffic.

Correct Answer: D
Section: [none]

http://www.exam.com/

Explanation
Explanation/Reference:
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 root-inconsistent state is effectively equal to a listening state. No traffic is forwarded across this port. In this
way, the root guard enforces the position of the root bridge.
Reference:
http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b.shtml
QUESTION 95
Which statement about restrictions for multichassis LACP is true?
A.
B.
C.
D.

It is available only on a Cisco Catalyst 6500 Series chassis.
It does not support 1Gb links.
Converting a port channel to mLACP can cause a service disruption.
It is not available in VSS.

Correct Answer: C
Section: [none]
Explanation
Explanation/Reference:
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/mla cp_server_support.html
QUESTION 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

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C.html QUESTION 97 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A. If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b. and both virtual switch members continue to forward traffic independently. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: Q. The http://www.com/ . all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. 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. B.2(33)SXI) In the dual active recovery mode. 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. Both virtual switch members cease to forward traffic. 6 C. 12 Correct Answer: C Section: [none] Explanation Explanation/Reference: 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. 8 D. D.exam. the VSS will transition to the dual active recovery mode. The VSS transitions to the dual active recovery mode. Reference: http://www.cisco.B. The virtual switch members reload. and only the new active virtual switch continues to forward traffic. The VSS transitions to the dual active recovery mode. What happens if all VSL connections between the virtual switch members are lost? A.

Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: In the dual active recovery mode.html QUESTION 99 You have been asked to install and configure a new switch in a customer network. The new active virtual switch continues to forward traffic on all links. Reference: http://www. http://www. The VSS detects which system was last in active state and shuts down the other switch. D. Use the console access to the existing and new switches to configure and verify correct device configuration. C. All interfaces are shut down in the formerly active virtual switch member. but the new active virtual switch forwards traffic on all links.exam.cisco.html QUESTION 98 Which statement describes what happens when a switch enters dual active recovery mode? A.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b.com/ . B. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. Reference: http://www.cisco. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops.new active virtual switch continues to forward traffic on all links. The switch shuts down and waits for the VSL link to be restored before sending traffic.

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com/ . the switch has been partially configured and you need to complete the rest of configuration to enable PC1 communication with PC2. Which of the configuration is correct? http://www.exam.You are connecting the New_Switch to the LAN topology.

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E. the VTP domain name must match.A.exam. step one is to find the correct VTP name on the other switches. Logging in to SW1 and using the "show vtp status" command we see this: http://www. C. D. B. Option A Option B Option C Option D Option E Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: Within any VTP. So.com/ .

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This leaves only choice D and E. QUESTION 100 You have been asked to install and configure a new switch in a customer network. 2.exam. Note that the VTP versions supported in this network are 1. We also see from the topology diagram that eth 0/0 of the new switch connects to a PC in VLNA 100. so we know that this port must be an access port in VLAN 100. 3 so either VTP version 2 or 3 can be configured on the new switch. Use the console access to the existing and new switches to configure and verify correct device configuration. http://www.com/ .So we know that the VTP domain must be CCNP. leaving only choice D as correct.

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B.com/ . C. VLAN1 VLAN 99 VLAN 999 VLAN 40 VLAN 50 http://www.Refer to the configuration. E. D.exam. For which configured VLAN are untagged frames sent over trunk between SW1 and SW2? A.

VLAN 300 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: The native VLAN is used for untagged frames sent along a trunk.F.com/ . http://www. VLAN 200 G.exam. By issuing the "show interface trunk" command on SW1 and SW2 we see the native VLAN is 99.

http://www.exam.com/ .QUESTION 101 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.

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exam.You are adding new VLANs. Configure VLAN 500 & VLAN 600 on both SW1 & SW2 Configure VLAN 500 and VLAN 600 on SW1 only Configure VLAN 500 and VLAN 600 on SW2 only Configure VLAN 500 and VLAN 600 on SW1 .com/ . B. D. 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. C.SW2 and SW4 http://www. Which configuration step is valid? A.

http://www.exam. On SW2. but SW4 is a client. so we will need to add both VLANs to SW1 and SW2.E. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: By issuing the "show vtp status command on SW2. SW2. configure vtp mode as off and configure VLAN 500 and VLAN 600. configure back to vtp server mode.com/ . and SW4 we see that both SW1 and SW2 are operating in VTP server mode.

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com/ .exam.QUESTION 102 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 http://www.

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SW4 and New_Switch http://www. Disable VTP pruning on SW1 only Disable VTP pruning on SW2 only Disable VTP pruning on SW4 only Disable VTP pruning on SW2. D.com/ . You are required to configure private VLANs for a new server deployment connecting to the SW4 switch. B.Examine the VTP configuration. C. Which of the following configuration steps will allow creating private VLANs? A.exam.

RouterA is currently configured correctly and is providing the routing function for devices on SwitchA and SwitchB. You have been tasked with competing the needed configuring of SwitchA and SwitchB.com/ . Disable VTP pruning on New_Switch and SW4 only. SwitchB has a minimal configuration. 21. you will need to only disable pruning on the switch that contains the private VLANs. only SW4 will connect to servers in a private VLAN. QUESTION 103 Scenario: You work for SWITCH.com/ are their default values. • SwitchA needs to be the root switch for vlans 11. All other vlans should be left http://www. Configuration Requirements for SwitchB • Vlan 21 o Name: Marketing o will support two servers attached to fa0/9 and fa0/10 • Vlan 22 o Name: Sales o will support two servers attached to fa0/13 and fa0/14 • Vlan 23 o Name: Engineering http://www.com. 13.exam. SwitchA and SwitchB use Cisco as the enable password.exam. but will need to be modified to support the addition of SwitchB.E. In this case. Configuration Requirements for SwitchA The VTP and STP configuration modes on SwitchA should not be modified. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: To create private VLANs. They have just added a new switch (SwitchB) to the existing network as shown in the topology diagram. SwitchA is currently configured correctly. 22 and 23. 12.

• 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. • SwitchB VTP mode needs to be the same as SwitchA.168. • Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link.exam.o 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. • SwitchB must operate in the same spanning tree mode as SwitchA • No routing is to be configured on SwitchB • Only the SVI vlan 1 is to be configured and it is to use address 192.11/24 Inter-switch Connectivity Configuration Requirements • For operational and security reasons trunking should be unconditional and Vlans 1. 21.1. http://www. This mode should be done with a non-proprietary protocol. 22 and 23 should tagged when traversing the trunk link. with SwitchA controlling activation.com/ .

21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! interface FastEthernet0/9 switchport access vlan 21 switchport mode access spanning-tree portfast ! interface FastEthernet0/10 switchport access vlan 21 switchport mode access spanning-tree portfast ! interface FastEthernet0/13 switchport access vlan 22 http://www.com/ .exam.21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.Correct Answer: Answer: Here are steps: Section: [none] Explanation Explanation/Reference: hostname SWITCH_B ! ! vlan 21 name Marketing vlan 22 name Sales vlan 23 name Engineering ! ! interface FastEthernet0/3 switchport trunk allowed vlan 1.

255.switchport mode access spanning-tree portfast ! ! interface FastEthernet0/14 switchport access vlan 22 switchport mode access spanning-tree portfast ! interface FastEthernet0/15 switchport access vlan 23 switchport mode access spanning-tree portfast ! interface FastEthernet0/16 switchport access vlan 23 switchport mode access spanning-tree portfast ! ! interface GigabitEthernet1/1 ! interface GigabitEthernet1/2 ! interface Port-channel 1 switchport mode trunk switchport trunk encapsulation dot1q spanning-tree allowed vlans 1.1.11 255.21-23 ! interface Vlan1 ip address 192.0 ! end SWITCH_B(config)# hostname SWITCH_A ! panning-tree vlan 11 root primary spanning-tree vlan 12 root primary spanning-tree vlan 13 root primary spanning-tree vlan 21 root primary spanning-tree vlan 22 root primary spanning-tree vlan 23 root primary http://www.255.com/ .exam.168.

21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/21 switchport access vlan 21 switchport mode access ! interface FastEthernet0/22 switchport access vlan 22 switchport mode access ! interface FastEthernet0/23 switchport access vlan 23 switchport mode access ! interface GigabitEthernet1/1 ! interface GigabitEthernet1/2 ! interface Port-channel 1 ! interface Vlan1 no ip address shutdown ! ip default-gateway 192. which has a partial configuration http://www.168.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.1 ! ! End QUESTION 104 You have been tasked with configuring multilayer SwitchC.! interface FastEthernet0/3 switchport trunk allowed vlan 1.1.exam.com/ .

All routes must be learned via EIGRP 65010 routing protocol. Also SwitchC needs to be able to ping server S1.250. Note: Due to administrative restrictions and requirements you should not add or delete VLANs. changes VLAN port assignments or create trunks. SwitchC uses Cisco as the enable password. The following subnets are available to implement this solution: – 10. http://www.10. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links.exam. Routed interfaces should use the lowest host on a subnet when possible. RouterC is correctly configured.200.32/27 – 190.0/24 – 190. You do not have access to RouteC.and has been attached to RouterC as shown in the topology diagram.250. All routes must be learned via the EIGRP routing protocol. Company policies forbid the use of static or default routing.10.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway. Company policies forbid the use of static or default routing. Routing must only be enabled for the specific subnets shown in the diagram.com/ .200. No trunking has been configured on RouterC.

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SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router). No trunking requires.Correct Answer: Answer: There are two ways to configure interVLAN routing in this case: Section: [none] Explanation Explanation/Reference: + Use RouterC as a “router on a stick” and SwitchC as a pure Layer2 switch.com/ . Trunking must be established between RouterC and SwitchC.exam. + Only use SwitchC for interVLAN routing without using RouterC. http://www. 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. also don’t modify/delete any port just do the above configuration.200.250.10.200. in fact it is not necessary because the network 190.65 255. C:\>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190. SwitchC(config-if)# ip address 10.250.250. Also make sure you use the correct EIGRP AS number (in the configuration above it is 650 but it will change when you take the exam) but we are not allowed to access RouterC so the only way to find out the EIGRP AS is to look at the exhibit above.0 0. no neighbor relationship is formed between RouterC and SwitchC.0.33 255.10.250.255.2 255. In order to complete the lab.0/16 is not used anywhere else in this topology. gi0/11 interfaces were configured as access ports so we don’t need to configure them in this sim.0.200.200. In fact.1 so this is the lowest usable IP address.com/ . we are pretty sure instead of using two commands “network 190.65 Now we have enough information to configure SwitchC (notice the EIGRP AS in this case is 650) Note: VLAN2 and VLAN3 were created and gi0/10.250.32 0.0. so you will not miss within it in the exam. you should expect the ping to SERVER to succeed from the MLS.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190.0.200. the simulator does not let you assign IP address on Gi0/1 interface. Also some reports said the “no auto-summary” command can’t be used in the simulator.255.0. and from the PCs as well.255.10.10.We should check the default gateways on H1 & H2. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.33 Host2: + Default gateway: 190. If you use wrong AS number.250.200.255 SwitchC(config-router)# network 190.10.0.200.0.255.exam.31″ http://www.224 SwitchC(config-if)# no shutdown SwitchC(config-if)#exit SwitchC(config)# ip routing (Notice: MLS will not work without this command) SwitchC(config)# router eigrp 65010 SwitchC(config-router)# network 10.0.0 ->RouterC has used IP 10.64 0. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED.0.200.31 SwitchC(config-router)# network 190.10. Click on H1 and H2 and type the “ipconfig” command to get their default gateways.255.32 0.255.

we can use “show run” command to verify.200.and “network 190.200.31″ we can use one simple command “network 190.64 0.exam. only the summarized network 190.0 is shown. But after finishing the configuration. http://www.0″ because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised.0.200. But in the exam the sim is just a flash based simulator so we should use two above commands. even without “no auto-summary” command the network still works correctly.com/ .0.0. just for sure.250.0.

Enable DHCP snooping globally.com/ . What is the solution to avoid the snooping database from being rebuilt after every device reboot? A.exam. Reference: http://www. D.com/en/US/docs/switches/lan/catalyst6500/ios/12. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Minimum DHCP Snooping Configuration The minimum configuration steps for the DHCP snooping feature are as follows: 1. authorization authentication accounting auditing Correct Answer: A http://www. Enable DHCP snooping for all VLANs that are associated with the switch. Disable Option 82 for DHCP data insertion. This step ensures that database entries are restored after a restart or switchover. 3. Ensure that DHCP server is connected through a trusted interface. By default.Question Set 1 QUESTION 1 A Cisco Catalyst switch that is prone to reboots continues to rebuild the DHCP snooping database. E. the trust state of all interfaces is untrusted. B. C. B.cisco.html#wp1090479 QUESTION 2 Which portion of AAA looks at what a user has access to? A. Enable DHCP snooping on at least one VLAN. C. 4. Define and configure the DHCP server. The feature is not active until you complete this step. By default. Apply ip dhcp snooping trust on all interfaces with dynamic addresses. 2. Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting. D. A DHCP snooping database agent should be configured. 5.2SX/configuration/guide/sno odhcp. Configure the DHCP snooping database agent. DHCP snooping is inactive on all VLANs.

(config)# aaa authentication login default radius local (config)# aaa authentication login login radius local (config)# aaa authentication login default local radius (config)# aaa authentication login radius local Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: In the command "aaa authentication login login radius local" the second login is the name of the AAA method. It also lists radius first then local. it can also support encryption.configure-it-in-the-cisco-ios/ QUESTION 3 Which command creates a login authentication method named "login" that will primarily use RADIUS and fail over to the local user database? A.com/ . Accounting: The last "A" is for accounting. It provides a way of collecting security information that you can use for billing. Depending on your security options. You can use accounting to see what users do once they are authenticated and authorized. http://www. Disable DHCP snooping information option. Configure a static DHCP snooping binding entry on the switch. so it will primarily use RADIUS for authentication and fail over to the local user database only if the RADIUS server is unreachable. Which solution ensures that the server maintains network reachability in the future? A. auditing. the network team is considering enabling dynamic ARP inspection alongside DHCP snooping. Reference: http://www.com/blog/data-center/what-is-aaa-and-how-do-you. Authorization: After initial authentication. For more protection against malicious attacks.Section: [none] Explanation Explanation/Reference: Explanation: AAA consists of the following three elements: Authentication: Identifies users by login and password using challenge and response methodology before the user even gains access to the network. and reporting. QUESTION 4 A server with a statically assigned IP address is attached to a switch that is provisioned for DHCP snooping. D. which would be specific to the individual user rights. B. you could get a log of when users logged in and when they logged out.exam. RADIUS or TACACS+ security servers perform authorization for specific privileges by defining attribute-value (AV) pairs. authorization looks at what that authenticated user has access to do.techrepublic. with accounting. you can define AAA authorization with a named list or authorization method. B. In the Cisco IOS. C. For example.

address command. the switch forwards the packet only if it is valid. If the ARP packet is received on a trusted interface. Disable VTP and manually assign VLANs. On untrusted interfaces.ciscopress. 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.com/articles/ article. Enable VTP version 3.2_55_se/configuration/guide/scg3750/swdynarp.cisco. B. Trust the interface that is connected to the server with the ip dhcp snooping trust command. Verify the source MAC address of all untrusted interfaces with ip dhcp snooping verify mac. 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. Private VLANs are configured in the context of a single switch and cannot have members on other switches. D. Reference: http://www. D. logs. Configure VTP Transparent Mode. Dynamic ARP inspection ensures that only valid ARP requests and responses are relayed. Which configuration must be made before the private VLAN is configured? A. It intercepts. To ensure network reachability to the server. the DHCP snooping binding database. Reference: http://www.html QUESTION 5 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12. and discards ARP packets with invalid IP-to-MAC address bindings. This capability protects the network from certain man-in-the-middle attacks. C. Private VLANs also carry TLVs that are not known to all types of Cisco switches.asp?p=29803&seqNum=6 http://www. configure a static DHCP snooping binding entry on the switch. Ensure all switches are configured as VTP server mode.C.com/ . This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. the switch forwards the packet without any checks.exam. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: You must configure VTP to transparent mode before you can create a private VLAN. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: Dynamic ARP inspection is a security feature that validates ARP packets in a network.

Which option is the cause of this issue? A.com/ . Static DHCP bindings are not configured on the switch. Packets from the workstation will be rate limited according to the default values set on the switch. Traffic will pass accordingly after the new IP address is populated into the binding database. its associated MAC address. or with source IP and MAC address filtering. even if they are not utilized for dynamic address allocation. clients are not receiving an IP address via the DHCP server.cisco. The DHCP server does not support information option 82. B. D.html#ipsourceguard QUESTION 7 A DHCP configured router is connected directly to a switch that has been provisioned with DHCP snooping.QUESTION 6 DHCP snooping and IP Source Guard have been configured on a switch that connects to several client workstations. and its associated VLAN number. The switch forwards traffic only when the source IP and MAC addresses match an entry in the IP source binding table. 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. Which statement describes the outcome of this scenario? A. You can configure IP source guard with source IP address filtering. B. When IP source guard is enabled with this option. However. C. If there is no match. The DHCP client interfaces have storm control configured. C. the packets are assumed to be spoofed and will be discarded. IP traffic is filtered based on the source IP and MAC addresses. Correct Answer: A Section: [none] Explanation Explanation/Reference: http://www. When IP source guard is enabled with this option. The interface that is connected to the workstation in question will be put into the errdisabled state. The switch uses the IP source binding table only when IP source guard is enabled. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). D.com/c/en/us/support/docs/switches/catalyst-3750-series. 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. DHCP snooping must be enabled on all VLANs. The IP address of one of the workstations does not match any entries found in the DHCP binding database. Reference: http://www.exam.switches/72846-layer2-secftrs-catl3fixed. IP traffic is filtered based on the source IP address. An entry in this table has an IP address. The packets originating from the workstation are assumed to be spoofed and will be discarded.

Reference: http://www. the switch blocks all IP traffic received on the interface.2_25_see/configuration/guide/3550SCG/ swdhcp82. but is unable to configure ip verify source under several of the interfaces. A network engineer is configuring the switch for DHCP snooping and IP Source Guard. C. A port access control list (ACL) is applied to the interface. there are two caveats: The DHCP server must support option 82.cisco. its associated MAC address. E. The port ACL allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic. including access and trunk ports. No VLANs exist on the switch and/or the switch is configured in VTP transparent mode. The MAC address in the DHCP packet is not learned as a secure address. In which three ways does this command impact the traffic? (Choose three. IP source guard is supported only on Layer 2 ports. The interfaces are configured as Layer 3 using the no switchport command. except for DHCP packets allowed by DHCP snooping. Reference: http://www. using the ip verify source port.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12.html#wp1069615 QUESTION 9 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server. You can enable IP source guard when DHCP snooping is enabled on an untrusted interface. D. The local DHCP server is disabled prior to enabling IP Source Guard. You can configure IP source guard with source IP address filtering or with source IP and MAC address filtering.2_25_see/configuration/guide/3550SCG/ swdhcp82.exam. The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). You can use IP source guard to prevent traffic attacks caused when a host tries to use the IP address of its neighbor. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: IP source guard is a security feature that restricts IP traffic on nonrouted. or the client is not assigned an IP address.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12. The configured SVIs on the switch have been removed for the associated interfaces. B. and its associated VLAN number.cisco.security interface configuration command.) http://www.Explanation: When you enable both IP Source Guard and Port Security. After IP source guard is enabled on an interface.com/ . Layer 2 interfaces by filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings.html#wp1069615 QUESTION 8 A switch is added into the production network to increase port capacity. The switch is configured for sdm prefer routing as the switched database management template. The switch uses the IP source binding table only when IP source guard is enabled. Which option is the cause of the problem? A. An entry in this table has an IP address. The MAC address of the DHCP client is learned as a secure address only when the switch receives non-DHCP data traffic.

00 to 100. or unicast storm control.com/ . Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth. storm control is disabled. By de.cisco. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth. C. F.com/ A. Reference: http://www. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. E. Correct Answer: CDF Section: [none] Explanation Explanation/Reference: Explanation: storm-control {broad. The range is 0.http://www. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. B. cast} level {level [levThe keywords have these meanings: el-low] | pps pps [ppslow]} For level.Configure broadcast.cast | multicast | uni. They decide to configure the http://www. The switch drops broadcasts when they reach 75% of bandwidth. D.exam. specify the rising threshold level for broadcast. The port blocks traffic when the rising threshold is reached. multicast. This value must be less than or equal to the rising suppression value. The port forwards traffic when traffic drops below this level. In this case. Only broadcast traffic is limited by this particular storm control configuration. specify the falling threshold level as a percentage (up to two decimal places) of the bandwidth. the broadcast keyword was used so only broadcast traffic is limited. If you do not configure a falling suppression level.html QUESTION 10 After port security is deployed throughout an enterprise campus.00. (Optional) For level-low. The range is 0.exam.2_25_see/configuration/guide/3550SCG/swtrafc.00. it is set to the rising suppression level. the network team has been overwhelmed with port reset requests. or unicast traffic as a percentage (up to two decimal places) of the bandwidth.fault.00 to 100.com/c/en/us/td/docs/switches/lan/catalyst3550/ software/release/12. multicast.

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. C. You can also customize the time to recover from the specified error disable cause (default is 300 seconds) by entering the errdisable recovery interval interval command.2/53SG/configuration/config/port_sec.cisco.) A. E. B. including the switch port that the particular host is using.exam.network to automate the process of re-enabling user ports. E. If a port is in per-VLAN errdisable mode. B. Which command accomplishes this task? A. D. D. Which two commands help trace this PC when the MAC address is known? (Choose two. switch(config)# errdisable recovery interval 180 switch(config)# errdisable recovery cause psecure-violation switch(config)# switchport port-security protect switch(config)# switchport port-security aging type inactivity switch(config)# errdisable recovery cause security-violation Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: When a secure port is in the error-disabled state.com/ . This is the default mode. Reference: http://www.com/c/en/us/td/docs/switches/lan/catalyst4500/12. switch# show mac address-table switch# show port-security switch# show ip verify source switch# show ip arp inspection switch# show mac address-table address <mac address> Correct Answer: AE Section: [none] Explanation Explanation/Reference: Explanation: These two commands will show the MAC address table. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port. Here is an example output: Switch> show mac-address-table http://www.pdf QUESTION 11 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server. C.

1540 Dynamic 2 FastEthernet0/5 0010. aaa authentication http://www. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces. B. Which option decreases consumption of bandwidth used by broadcast traffic? A.html QUESTION 13 Which command globally enables AAA on a device? A.-----------. E. storm control is disabled.com/ .7b00. Storm control is configured for the switch as a whole but operates on a per-port basis.-------------------. or multicast packets.7b00. mistakes in network configuration. Errors in the protocol-stack implementation. aaa new-model B. or users issuing a denial-of-service attack can cause a storm. Reference: http://www.1_22ea/SCG/scg/swtrafc.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 ------------------.exam. Storm control uses rising and falling thresholds to block and then restore the forwarding of broadcast.---.0010.e289 Dynamic 1 FastEthernet0/1 0010. You can also set the switch to shut down the port when the rising threshold is reached. A LAN storm occurs when packets flood the LAN. C.1545 Dynamic 2 FastEthernet0/5 QUESTION 12 While troubleshooting a network outage. or unicast storm on a port. multicast. D.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12.cisco. By default.0de0. unicast. creating excessive traffic and degrading network performance. storm control SDM routing Cisco IOS parser integrated routing and bridging Dynamic ARP Inspection Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Storm control prevents traffic on a LAN from being disrupted by a broadcast.

B. in sequence. Commands--Applies to the EXEC mode commands a user issues.C. if that method fails to respond. Reference: http://www.ht ml QUESTION 14 Which AAA Authorization type includes PPP.cisco. the Cisco IOS software selects the next method listed in the method list. SLIP. EXEC--Applies to the attributes associated with a user EXEC terminal session. ·Network--Applies to network connections. http://www. network IP mobile EXEC auth-proxy Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Method lists for authorization define the ways that authorization will be performed and the sequence in which these methods will be performed. enable AAA by using the aaa new-model global configuration command. and ARAP connections? A. This process continues until there is successful communication with a listed authorization method. or all methods defined are exhausted. associated with a specific privilege level.com/ . This can include a PPP. aaa accounting Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: To configure AAA authentication. refer to the chapter "Configuring Authentication Proxy" in the "Traffic Filtering and Firewalls" part of this book. aaa authorization D. including global configuration commands. D.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen. thus ensuring a backup system in case the initial method fails. SLIP. Method lists enable you to designate one or more security protocols to be used for authorization. Method lists are specific to the authorization type requested: Auth-proxy--Applies specific security policies on a per-user basis. Command authorization attempts authorization for all EXEC mode commands. Cisco IOS software uses the first method listed to authorize users for specific network services. A method list is simply a named list describing the authorization methods to be queried (such as RADIUS or TACACS+). C. For detailed information on the authentication proxy feature. or ARAP connection. AAA features are not available for use until you enable AAA globally by issuing the aaa new-model command.exam.

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. Reference: http://www. C. D. you are defining a particular list of authorization methods for the indicated authorization type.cisco. When you create a named method list. the authentication service is transparent to the client.cisco. Reference: http://www. Because the switch acts as the proxy. B. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server.1x? A.Reverse Access--Applies to reverse Telnet sessions. the authentication server--performs the actual authentication of the client.exam.1x.1_19_ea1/configuration/guide/2940scg_1/sw8021x.pdf QUESTION 16 Refer to the exhibit.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/12. RADIUS with EAP Extension TACACS+ RADIUS with CoA RADIUS using VSA Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: With 802.ht ml QUESTION 15 Which authentication service is needed to configure 802. http://www.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathor.com/ .

None means no authentication. B.Which login credentials are required when connecting to the console port in this output? A. meaning that credentials are not required and all sessions are allowed access immediately. C. http://www.com/ . none required username cisco with password cisco no username with password linepass login authentication default Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Here the console has been configured with the NO_AUTH name. which lists none as the authentication method. D. QUESTION 17 Refer to the exhibit.exam.

Finally. QUESTION 18 Which type of information does the DHCP snooping binding database contain? A.When a network administrator is attempting an SSH connection to the device. local username. untrusted hosts with available IP addresses http://www. in which order does the device check the login credentials? A. local username. C. line password. then if that fails use the local user database." The AAA default login preference is stated in order from first to last. RADIUS server Line password. line password RADIUS server. RADIUS server. if that fails use the line password. where the configured authentication method is named "default.exam. local username Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: SSH sessions use the vty lines. so here the "aaa authentication login default group radius local line" means to use RADIUS first. untrusted hosts with leased IP addresses B.com/ . trusted hosts with leased IP addresses C. B. local username Line password. RADIUS server. D.

exam. Dynamic ARP Inspection storm control VTP pruning DHCP snooping Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a trusted database.cisco.com/ . ip dhcp snooping trust B. ip dhcp snooping http://www.D. On untrusted interfaces.html QUESTION 20 Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP server? A. If the ARP packet is received on a trusted interface. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch.com/c/en/us/support/docs/switches/catalyst-3750-series. C.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. Rate-limits DHCP traffic from trusted and untrusted sources.cisco. the switch forwards the packet only if it is valid. · Builds and maintains the DHCP snooping binding database. trusted hosts with available IP addresses Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: DHCP snooping is a security feature that acts like a firewall between untrusted hosts and trusted DHCP servers. the switch forwards the packet without any checks. Reference: http:// www. which contains information about untrusted hosts with leased IP addresses.switches/72846-layer2-secftrs-catl3fixed. The DHCP snooping feature performs the following activities: Validates DHCP messages received from untrusted sources and filters out invalid messages.2SX/configuration/guide/book/snoodhcp. B. Reference: http://www. Utilizes the DHCP snooping binding database to validate subsequent requests from untrusted hosts.pdf QUESTION 19 Which switch feature determines validity based on IP-to-MAC address bindings that are stored in a trusted database? A. the DHCP snooping binding database. D.

com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. You can have more than one isolated port in a specified http://www. including the community and isolated host ports? A. B. Private VLANs block all traffic to isolated ports except traffic from promiscuous ports. You can also have secondary VLANs that are not associated to any promiscuous port. If a Layer 2 LAN port is connected to a DHCP client.exam. configure the port as trusted by entering the "ip dhcp snooping trust" interface configuration command. or no secondary VLANs. follow these guidelines: DHCP snooping is not active until you enable the feature on at least one VLAN. configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command. This port has complete isolation from other ports within the same private VLAN domain. If a Layer 2 LAN port is connected to a DHCP server. You can associate a secondary VLAN to more than one promiscuous port. D. including the community and isolated host ports. except that it can communicate with associated promiscuous ports. Isolated--An isolated port is a host port that belongs to an isolated secondary VLAN. ip dhcp snooping information Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: When configuring DHCP snooping.2SX/configuration/guide/book/snoodhcp. make sure that the devices acting as the DHCP server and the DHCP relay agent are configured and enabled.C. Reference: http://www.com/ . associated to that port. ip dhcp trust D. and enable DHCP globally on the switch. promiscuous port isolated port community port trunk port Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: The types of private VLAN ports are as follows: Promiscuous--A promiscuous port belongs to the primary VLAN. C. that belong to those secondary VLANs associated to the promiscuous port and associated with the primary VLAN. Traffic received from an isolated port is forwarded only to promiscuous ports. Each promiscuous port can have several secondary VLANs.html QUESTION 21 Which private VLAN access port belongs to the primary VLAN and can communicate with all interfaces. You can have several promiscuous ports in a primary VLAN. Before globally enabling DHCP snooping on the switch. as long as the promiscuous port and secondary VLANs are within the same primary VLAN. You may want to do this for load-balancing or redundancy purposes. The promiscuous port can communicate with all interfaces.cisco.

Each port is completely isolated from all other ports in the isolated VLAN. all the traffic remains isolated within each one. B.com/ . DHCP snooping database B. dynamic ARP database C. both isolated and community. These interfaces are isolated from all other interfaces in other communities and from all isolated ports within the private VLAN domain. Reference: http://www.cisco.isolated VLAN. 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. and the traffic from each isolated port also remains completely separate. and Community Private VLANs Primary VLANs and the two types of secondary VLANs (isolated and community) have these characteristics: Primary VLAN-. You can configure multiple community VLANs in a private VLAN domain. You can configure multiple isolated VLANs in a private VLAN domain.cisco. Each isolated VLAN can have several isolated ports. and to other promiscuous ports. Reference: http://www. Isolated.exam.html QUESTION 22 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.The primary VLAN carries traffic from the promiscuous ports to the host ports. Community--A community port is a host port that belongs to a community secondary VLAN. D. but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN. C. Isolated VLAN --An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. The ports within one community can communicate. isolated VLAN primary VLAN community VLAN promiscuous VLAN Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Understanding Primary. dynamic routing database http://www.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs.html QUESTION 23 Which database is used to determine the validity of an ARP packet based on a valid IP-to-MAC address binding? A.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs. Community ports communicate with other ports in the same community VLAN and with associated promiscuous ports.

com/ .html QUESTION 24 When IP Source Guard with source IP filtering is enabled on an interface. D. B.D. Reference: http://www. which feature must be enabled on the access VLAN for that interface? http://www. DAI can determine the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a DHCP snooping binding database. Drops invalid ARP packets.exam. DHCP snooping storm control spanning-tree portfast private VLAN Correct Answer: A Section: [none] Explanation Explanation/Reference: http://www. C.com/ A. static ARP database Correct Answer: A Section: [none] Explanation Explanation/Reference: 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 that you have created. Verifies that a packet has a valid IP-to-MAC address binding before updating the ARP cache or forwarding the packet.exam.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. This database is built by DHCP snooping when it is enabled on the VLANs and on the device.cisco.

B. the source IP address filter is applied on all the VLANs. When IP source guard with source IP filtering is enabled on an interface.html QUESTION 25 Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic? A.exam. D. multicast. If you are enabling IP source guard on a trunk interface with multiple VLANs and DHCP snooping is enabled on all the VLANs.Explanation: IP Source Guard Configuration Guidelines You can configure static IP bindings only on nonrouted ports.pdf QUESTION 26 Which command would a network engineer apply to error-disable a switchport when a packet.1x port-based authentication is enabled. storm control port security VTP pruning VLAN trunking Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: A traffic storm occurs when packets flood the LAN. C. If you enter the ip source binding mac-address vlan vlan-id ip-address interface interface-id global configuration command on a routed interface.storm is detected? A. D.com/c/en/us/td/docs/routers/7600/ios/122SR/configuration/guide/swcg/do s.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960x/ software/15. this error message appears: Static IP source binding can only be configured on switch port. or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack. Reference:http://3c3cc. router(config-if)#storm-control action shutdown router(config-if)#storm-control action trap router(config-if)#storm-control action error router(config-if)#storm-control action enable Correct Answer: A Section: [none] Explanation http://www.x_cg_chapter_01110. Reference: http://www. which creates excessive traffic and degrades network performance. DHCP snooping must be enabled on the access VLAN for that interface. You can enable this feature when 802. B. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast. C.com/ .0_2_EX/security/configuration_guide/b_sec_152ex_2960-x_cg/b_sec_152ex_2960.

1X is already preventing inbound traffic on the interface from unknown MAC addresses. B.1x authenticates.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12.1X and Port Security You can configure port security and 802. C. It allows 802. 802.2SX/configuration/guide/book/storm. http://www.1X processes packets before port security processes them.1x to secure the IP address that port security authenticates. perform this task: Command Purpose Step 1 Router(config)# interface {{type1 Selects an interface to configure.exam. D.1X on the same interfaces. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: 802. It allows port security to secure the IP address that 802. Reference: http://www.html QUESTION 27 A network engineer configures port security and 802.1x authenticates. · Enter the no storm-control action shutdown command to revert to the default action (drop).1x to secure the MAC address that port security authenticates.com/ . Port security secures the MAC addresses that 802. or the shutdown and no shutdown commands to reenable ports.1x on the same interface.cisco. It allows 802.Explanation/Reference: Explanation: Configuring the Traffic Storm Control Shutdown Mode To configure the traffic storm control shutdown mode on an interface. It allows port security to secure the MAC address that 802.1X authenticates. so when you enable both on an interface. · Use the error disable detection and recovery feature. slot/port} | {port-channel number}} Step 2 Router(config-if)# storm-control (Optional) Configures traffic storm control to action shutdown error-disable ports when a traffic storm occurs. Which option describes what this configuration allows? A. 802.

and added to the running configuration? A.2/25ew/configuration/guide/conf/port_sec.html QUESTION 28 Which feature describes MAC addresses that are dynamically learned or manually configured.pdf QUESTION 29 On which interface can port security be configured? A. Trunk ports--You can configure port security on interfaces that you have configured as Layer 2 trunk ports. Reference: http://www.com/c/en/us/td/docs/switches/lan/catalyst4500/12.com/ . D. VLAN maximums are not useful for access ports. The device allows VLAN maximums only for VLANs associated with the trunk port. the interface does not need to dynamically relearn them when the switch restarts. sticky dynamic static secure Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: With port security. you can configure MAC addresses to be sticky.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx. Although sticky secure addresses can be manually configured. D.cisco. B. it is not recommended. B. http://www.cisco.Reference: http://www. C. stored in the address table. static trunk ports destination port for SPAN EtherChannel port group dynamic access point Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Port Security and Port Types You can configure port security only on Layer 2 interfaces. On an access port. C. If these addresses are saved in the configuration file. These can be dynamically learned or manually configured. and added to the running configuration.exam. stored in the address table. 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. port security applies only to the access VLAN.os/security/configuration/guide/sec_nx-os-cfg/sec_portsec.

which port type connects the switch to the gateway router? A. B. Promiscuous port (P-Port): The switch port connects to a router.SPAN ports--You can configure port security on SPAN source ports but not on SPAN destination ports. Host port further divides in two types Isolated port (I-Port) and Community port (C-port). Ethernet Port Channels--Port security is not supported on Ethernet port channels. D. o Community Port (C-Port): Connects to the regular host that resides on community VLAN.com/c/en/us/td/docs/switches/datacenter/sw/4_1/ nx. D. promiscuous community isolated trunked Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. firewall or other common gateway device. In other words.os/security/configuration/guide/sec_nx-os-cfg/sec_portsec. C. Host Ports: o Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN.html QUESTION 30 When you configure private VLANs on a switch.wikipedia. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. This port communicates with P-Ports and ports on the same community VLAN.org/wiki/Private_VLAN QUESTION 31 When you configure a private VLAN.cisco. C. which type of port must you configure the gateway router port as? A.exam.com/ . B. This port communicates only with P-Ports. promiscuous port isolated port community port access port Correct Answer: A Section: [none] Explanation http://www. Reference: http://www. This port can communicate with anything else connected to the primary or any secondary VLAN. Reference: http://en.

0/24 should be allowed on VLAN 20.0/24. o Community Port (C-Port): Connects to the regular host that resides on community VLAN. 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. · Devices on VLAN 20 are restricted to the subnet of 172.wikipedia. Host port further divides in two types Isolated port (I-Port) and Community port (C-port).40. DSW1 and ASW1.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches. This port communicates with P-Ports and ports on the same community VLAN. · Packets from devices in the subnet of 172. Corporate polices do not allow layer 3 functionality to be enabled on the switches. Reference: http://en.Explanation/Reference: Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port.exam. You have been tasked with implementing the above access control as a pre-condition to installing the servers.120. You must use the available IOS switch features. Host Ports: o Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN.40. This port communicates only with P-Ports. · Filtering should be implemented as close to the serverfarm as possible. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.46 · Radius key: rad123 · Authentication should be implemented as close to the host as possible. This port can communicate with anything else connected to the primary or any secondary VLAN. http://www. Authentication is to be done via a Radius server: · Radius server host: 172. The topology diagram indicates their layer 2 mapping. In other words.120.120. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. For security reasons. · Packets from devices in any other address range should be dropped on VLAN 20.com/ .40. Promiscuous port (P-Port): The switch port connects to a router. firewall or other common gateway device. The Radius server and application servers will be installed at a future date.org/wiki/Private_VLAN QUESTION 32 SIMULATION SWITCH.

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exam. C. D. Correct Answer: Section: [none] Explanation Explanation/Reference: Answer: The configuration: Step1: Console to ASW1 from PC console 1 http://www. B.com/ .A.

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 172.39.120.0.ASW1(config)#aaa new-model ASW1(config)#radius-server host 172.exam.com/ .255 DSW1(config-ext-nacl)#exit DSW1(config)#vlan access-map PASS 10 DSW1(config-access-map)#match ip address 10 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 http://www.0 0.120.0.40.

it is necessary to restrict access to VLAN 20 in the following manner: • Users connecting to VLAN 20 via portfO/1 on ASW1 must be authenticated before they are given access to the network. You must use the available IOS switch features.0/24.40.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches.40. You have been tasked with implementing the above access control as a pre-condition to installing the servers.120. DSW1 and ASW1. For security reasons. • Packets from devices in any other address range should be dropped on VLAN 20. The Radius server and application servers will be installed at a future date.DSW1#copy run start QUESTION 33 SWITCH.0/24 should be allowed on VLAN 20. • Packets from devices in the subnet of 172.exam. • Filtering should be implemented as close to the serverfarm as possible. http://www. Corporate polices do not allow layer 3 functionality to be enabled on the switches.120. The topology diagram indicates their layer 2 mapping. • Devices on VLAN 20 are restricted to the subnet of 172.120. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.com/ . Authentication is to be done via a Radius server: • Radius server host: 172.40.46 • Radius key: rad123 • Authentication should be implemented as close to the host as possible.

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com/ .exam.http://www.

120.exam.Correct Answer: Answer: The configuration: Section: [none] Explanation Explanation/Reference: Step1: Console to ASW1 from PC console 1 ASW1(config)#aaa new-model ASW1(config)#radius-server host 172.39.com/ .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 http://www.

40.120.ASW1#copy run start Step2: Console to DSW1 from PC console 2 DSW1(config)#ip access-list standard 10 DSW1(config-ext-nacl)#permit 172.0 0.exam.0.com/ .0.255 DSW1(config-ext-nacl)#exit DSW1(config)#vlan access-map PASS 10 DSW1(config-access-map)#match ip address 10 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 http://www.

D.cisco. If an interface is not tracked. The highest [preempt [delay delay]] number represents the highest priority. The ber] priority priority range is 1 to 255.com/en/US/docs/switches/lan/catalyst3550/software/release/12. 50 100 120 1024 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: standby [group-num.html QUESTION 2 What is the default HSRP priority? A. the hot standby priority on the device on which tracking has been configured decreases by 10. B. standby group standby priority backup interface standby track Correct Answer: D Section: [none] Explanation Explanation/Reference: 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. the default priority is 100. C. http://www. Reference: http://www. its state changes do not affect the hot standby priority of the configured device. B. When a tracked interface fails.Set a priority value used in choosing the active router.1_19_ea1/confi guration/guide/swhsrp.exam. C.com/ . D.Question Set 1 QUESTION 1 Which configuration command ties the router hot standby priority to the availability of its interfaces? A. you can configure a separate list of interfaces to be tracked. For each interface configured for hot standby.

D. Use the no form of the command to restore the default values. the default is 0 (no de.html#wp1044327 QUESTION 3 Which option is a benefit of using VSS? A.pone taking over the active role for the shown number of sec.1_19_ea1/confi guration/guide/swhsrp. C.com/en/US/docs/switches/lan/catalyst3550/software/release/12. it assumes control as the active router. B.com/en/US/docs/solutions/Enterprise/Data_Center/vssdc_integrate.(Optional) group-number--The group number to which the command applies.cisco. VSS eliminates the need for FHRP at the aggregation layer of the data center.html QUESTION 4 Which First Hop Redundancy Protocol is an IEEE Standard? A. B. D.exam. reduces cost simplifies configuration provides two independent supervisors with two different control planes removes the need for a First Hop Redundancy Protocol Correct Answer: D Section: [none] Explanation Explanation/Reference: 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.com/ . Reference: http://www. FHRPs allow two (or more) distinct routers to share a common IP address providing a redundant Layer-3 default gateway for end nodes. The range is 0 to 36000 (1 hour). This VSS routing instance fulfills this first-hop role without the need for a dedicated protocol.onds. Reference: http://www. (Optional) preempt--Select so that when the local router has a higher priority than the active router. The VSS system creates a single logical router at Layer 3. (Optional) delay--Set to cause the local router to post. C. The VSS IP route is highly available due to MEC and the resiliency of the VSS system.lay before taking over). GLBP HSRP VRRP OSPF http://www.cisco.

exam.Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: A comparison of the three First Hop Redundancy Protocols are listed below: GLBP HSRP VRRP Protocol (Gateway Load (Hot Standby Router (Virtual Redundancy Features Balancing Proprotocol) Router Protocol) tocol) . one with highest pri.. routers. .1 standby router.1 group (Active . Cisco propriScope Cisco proprietary IEEE standard http://www.1 active router. ority become master.Can use real router .address..com/ ..1 master router.1 or Virtual Foror more backup more listening warder) passing routers.up to Router role 1024 virtual routers (GLBP groups) per physical interface.1 AVG (Active Virtual Gateway)...up to 4 AVF routers on the . traffic. the .Use virtual ip ad. if not.ip address.Use virtual ip dress.

etary
Active Virtual
Active Router: Master Router: (*) Gateway:
1-Highest Priority 1-Highest Priority 1-Highest PriElection
2-Highest IP 2-Highest IP ority
(tiebreaker) (tiebreaker) 2-Highest IP
(tiebreaker)
Tracking yes yes yes
Optimization
Preempt yes yes yes
features
Timer adyes yes yes
justments
Traffic type 224.0.0.2 udp 1985 224.0.0.18 IP 112 224.0.0.102 udp (version1) 3222
224.0.0.102-udp 1985
(version2)
Advertisement 1 Hello 3 secHello 3 seconds
second onds
(Master Down InterTimers val)3 * Advertisement
(Hold) 10 sec+ skew time
(Hold) 10 seconds
onds
(Skew time)(256-priority) / 256
Load-balancing
orientedWeighted algo- Multiple HSRP - Multiple VRRP
rithm.- Host-degroup per in- group per inpendent algoterface/SVI/routed terface/SVI/routed
rithm.
int. int.
- Round-Robin

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algorithm (default).
Load-balancing functionalClients are
ity
transparently
updated with
Requires appropriate Requires appropriate
virtual MAC
distribution of Virtual distribution of Virtual
according to
GW IP per Clients for GW IP per Clients for
load-balancing
optimal load-balanc- optimal load-balancalgorithm
ing.(generally through ing.(generally through
through ARP
DHCP) DHCP)
requesting a
unique virtual
gateway.
Reference: http://cciethebeginning.wordpress.com/2008/08/23/router-high-availability-protocol- comparison-2/
QUESTION 5
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.
B.
C.
D.

1
5
10
15

Correct Answer: C
Section: [none]
Explanation
Explanation/Reference:
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. When a tracked interface fails, the hot standby priority on the device on which tracking has been configured decreases by 10. If an
interface is not tracked, its state changes do not affect the hot standby priority of the configured device. For each interface configured for hot standby, you can
configure a separate list of interfaces to be tracked.

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Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_19_ea1/confi guration/guide/swhsrp.html
QUESTION 6
What is the maximum number of virtual MAC addresses that GLBP allows per group?
A.
B.
C.
D.

2
4
6
8

Correct Answer: B
Section: [none]
Explanation
Explanation/Reference:
Explanation:
GLBP Virtual MAC Address Assignment
A GLBP group allows up to four virtual MAC addresses per group. The AVG is responsible for assigning the virtual MAC addresses to each member of the group.
Other group members request a virtual MAC address after they discover the AVG through hello messages. Gateways are assigned the next MAC address in
sequence. A virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder. 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.
Reference:
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html#wp1039651
QUESTION 7
Which gateway role is responsible for answering ARP requests for the virtual IP address in GLBP?
A.
B.
C.
D.

active virtual forwarder
active virtual router
active virtual gateway
designated router

Correct Answer: C
Section: [none]
Explanation
Explanation/Reference:
Explanation:
GLBP Active Virtual Gateway
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Members of a GLBP group elect one gateway to be the active virtual gateway (AVG) for that group. Other group members provide backup for the AVG in the event
that the AVG becomes unavailable. The AVG assigns a virtual MAC address to each member of the GLBP group. Each gateway assumes responsibility for
forwarding packets sent to the virtual MAC address assigned to it by the AVG. These gateways are known as active virtual forwarders (AVFs) for their virtual MAC
address.
The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address. Load sharing is achieved by the AVG replying to the
ARP requests with different virtual MAC addresses.
Reference: http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html
QUESTION 8
Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router?

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A.
B.
C.
D.

virtual router master
virtual router backup
virtual router active
virtual router standby

Correct Answer: A
Section: [none]
Explanation
Explanation/Reference:
Explanation:
VRRP Definitions
VRRP Router A router running the Virtual Router Redundancy Protocol. It may participate in one or more
virtual routers.
Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN.
It consists of a Virtual Router Identifier and
a set of associated IP address(es) across a
common LAN. A VRRP Router may backup one or
more virtual routers.

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C. then it will always become the Master.org/rfc/rfc3768. This is the router that. will respond to packets addressed to one of these IP addresses for ICMP pings. Primary IP Address An IP address selected from the set of real interface addresses. Reference: http://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. D. standby 1 track 100 standby 1 track 100 decrement 1 standby 1 track 100 decrement 5 standby 1 track 100 decrement 20 Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: The default decrement value for HSRP standby tracking is 10. standby slave http://www. and answering ARP requests for these IP addresses. One possible selection algorithm is to always select the first address. There is no need to explicitly state the value if the desired value is the default value. B.ietf.com/ . when up.txt QUESTION 9 Which command correctly configures standby tracking for group 1 using the default decrement priority value? A. QUESTION 10 Which command configures an HSRP group to become a slave of another HSRP group? A.IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address(es).exam. Note that if the IP address owner is available. TCP connections. etc. VRRP advertisements are always sent using the primary IP address as the source of the IP packet.

standby follow D. The "standby follow" command configures an HSRP group to become a slave of another HSRP group. then it indicates that this router is receiving its own hello packets sent. If the interface MAC address is different from the one reported in http://www.cisco. Reference: http://www. standby group backup Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Perform this task to configure multiple HSRP client groups. Which option describes the reason for this message in a GLBP configuration? A.B.com/en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp. Unavailable GLBP active forwarder Incorrect GLBP IP address HSRP configured on same interface as GLBP Layer 2 loop Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: This section provides information you can use to troubleshoot your configuration. standby group track C.hsrp-mgo. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues. B.exam.html QUESTION 11 Refer to the exhibit. C. In order to resolve this issue. HSRP client groups follow the master HSRP with a slight.com/ . random delay so that all client groups do not change at the same time. Verify the spanning-tree topology and check if there is any layer2 loop. If the MAC address of the interface is the same as the one reported in the error message. D. issue the show interface command to verify the MAC address of the interface.

you have been asked to investigate and respond to the following question.0. http://www. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224.255. permit the Multicast address by permit 224.255. then some other device with a MAC address reports this error message. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 .com/en/US/products/hw/switches/ps708/products_configuration_example0918 6a00807d2520.the error message. with an enterprise network (access. Using the running configurations and show commands.0 15.255.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.0. The distribution switches are configured to use HSRP to provide a high availability solution.cisco. When configuring the multicast boundary command. unless GigabitEthernet1/0/1 on backup device has also failed. Inc.0.102 and User Datagram Protocol (UDP) port 3222 (source and destination).com/ . Reference: http://www. Troubleshooting has identified several issues. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.0. is a medium sized company.exam.shtml#dr QUESTION 12 Ferris Plastics. Currently all interfaces are up.

exam.com/ .http://www.

com/ .http://www.exam.

Correct Answer: A Section: [none] http://www. C. D. DSW1 did not become the active router for VLAN 101 as desired. after GigabitEthemet1/0/1 on DSW1 was reactivated.exam. B.com/ . GigabitEthernet1/0/1 on DSW1 was shut down. decrease the priority value to avaluethatis less ' than the priority value configured in the VLAN 101 HSRP group on DSW2. 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. What needs to be done to make the group for VLAN 101 function properly? A. Disable preempt in the VLAN 101 HSRP group on DSW2's. However. DSW2 became the active HSRP device for VLAN 101 as desired.During routine maintenance. Enable preempt in the VLAN 101 HSRP group on DSW1. In the VLAN 101 HSRP group on DSW1. All other interfaces were up.

exam. unless GigabitEthernet1/0/1 on backup device has also failed. 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. Using the running configurations and show commands. The distribution switches are configured to use HSRP to provide a high availability solution.com/ . is a medium sized company. http://www. Inc.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. Troubleshooting has identified several issues.Explanation Explanation/Reference: Explanation: QUESTION 13 Ferris Plastics. Currently all interfaces are up. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 .

exam.com/ .http://www.

com/ .http://www.exam.

com/ . The decrement value on DSWTs should be greaterthan 190 and less than 200. B. DSW1 remained the active device for the VLAN 102 HSRP group.During routine maintenance. The decrement value on DSWTs should be greaterthan 195 and less than 205. The decrement value on DSW1 should be greaterthan 11 and less than 19. What needs to be done to make the group function properly? A. D. During this time. All other interfaces were up. Correct Answer: C Section: [none] Explanation http://www. The decrement value on DSW1 should be greaterthan 5 and less than 15. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1. 0 The decrement value on DSW1 should be greaterthan 9 and less than 15.exam. C. E. You have determined that there is an issue with the decrement value in the track command for the VLAN 102 HSRP group.

is a medium sized company.com/ . Currently all interfaces are up. http://www. Because 200 11 = 189 < 190 (priority of Vlan102 on DS2). The left Vlan102 is console1 of DS1.Explanation/Reference: Explanation: Use "show run" command to show.primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. The distribution switches are configured to use HSRP to provide a high availability solution. Priority value is 200. unless GigabitEthernet1/0/1 on backup device has also failed. with an enterprise network (access. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. QUESTION 14 Ferris Plastics.exam. we should decrement value in the track command from 11 to 18. you have been asked to investigate and respond to the following question. Using the running configurations and show commands. Troubleshooting has identified several issues. Inc.

exam.com/ .http://www.

com/ .http://www.exam.

increase the priority value to a value greater 200 and less than 250. On DSW2. increase the decrement value in the track command to a value greater than 10 and less than 50.com/ .exam. B. On DSW1. disable preempt. On DSW1. DSW2 has not become the active device for the VLAN 103 HSRP group. decrease the priority value to a value less than 190 and greater than 150. C. On DSW2. Correct Answer: C Section: [none] Explanation Explanation/Reference: http://www. As related to the VLAN 103 HSRP group. D.All interfaces are active. what can be done to make the group function properly? A.

but it should be less than 250 so that if the gig 1/0/1 interface goes down.com/ . We need to increase the priority of DSW2 to greater than 200. so the correct answer is to increase the priority to more than 200. DSW1 will become active. but less than 250. while the local priority is 190.Explanation: From the output shown below of the HSRP status of DSW2. DSW2 is configured to decrement the priority by 50 if this interface goes down. http://www.exam. we see that the active router has a priority of 200.

unless GigabitEthernet1/0/1 on backup device has also failed. is a medium sized company. Currently all interfaces are up. with an enterprise network (access. Troubleshooting has identified several issues.QUESTION 15 Ferris Plastics. http://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.exam. The distribution switches are configured to use HSRP to provide a high availability solution.com/ . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. you have been asked to investigate and respond to the following question. Using the running configurations and show commands. Inc.

com/ .http://www.exam.

com/ .http://www.exam.

As related to the VLAN 104HSRP group. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1 and DSW2. C. what can to be done to make the group function properly? A. On DSW2 decrease the priority value to a value less than 150.During routine maintenance. On DSW1.exam. DSW1 became the active router for the VLAN 104HSRP group. During this time. decrease the decrement value in the track command to a value less than 1. On DSW1. All other interfaces were up. D. B.com/ . On DSW1. Correct Answer: C Section: [none] Explanation http://www. disable preempt. increase the decrement value in the track command to a value greater than 6.

Inc.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. http://www. Example: if we are disable preempt on DS1. If increase the decrement in the track value to a value greater than 6 (> or = 6). By do that. Vlan104 (left): 150 1 = 149. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . The distribution switches are configured to use HSRP to provide a high availability solution.exam. In this question.com/ . G0/1/0 on DS1 & DS2 is shutdown. Vlan104 (left): 150 6 = 144. you will make Vlan104's HSRP group fail function. you have been asked to investigate and respond to the following question. Currently all interfaces are up.Explanation/Reference: Explanation: We should NOT disable preempt on DS1. Using the running configurations and show commands. unless GigabitEthernet1/0/1 on backup device has also failed. Vlan104 (right): 200 155 = 145. Result is priority 144 < 145 (vlan104 on DS2 is active). is a medium sized company. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. It can not become active device when G1/0/1 on DS2 fail. Result is priority 149 > 145 (Vlan104 on DS1 is active). Troubleshooting has identified several issues. QUESTION 16 Ferris Plastics. with an enterprise network (access.

exam.com/ .http://www.

http://www.exam.com/ .

50 100 150 200 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: http://www. C.com/ . B. D.exam.What is the priority value of the VLAN 105 HSRP group on DSW2? A.

is a medium sized company. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . unless GigabitEthernet1/0/1 on backup device has also failed.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.Use "show standby brief" command on console2. http://www. The distribution switches are configured to use HSRP to provide a high availability solution. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Inc.com/ . Troubleshooting has identified several issues. Currently all interfaces are up. Using the running configurations and show commands. QUESTION 17 Ferris Plastics. Very easy to see priority of Vlan105 is 100. with an enterprise network (access. you have been asked to investigate and respond to the following question.exam.

http://www.exam.com/ .

com/ .exam.http://www.

what will be the resulting priority value of the VLAN 105 HSRP group on router DSW2? A. C. 90 100 150 200 Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation http://www. D.com/ . B.If GigabitEthemet1/0/1 on DSW2 is shutdown.exam.

com/ . 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. QUESTION 18 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. the current priority for VLAN 105 is 100. http://www.As seen below.exam. They have questions about how these two devices will perform in the event of a device failure.

exam.http://www.com/ .

exam.http://www.com/ .

C.What percentage of the outgoing traffic from the 172.10. B. R2-50% R2-100% R1-100% http://www.com/ . D. R1-0% R1-50 %.exam.0/24 subnet is being forwarded through R1? A.16.

Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: Based on the following output. QUESTION 19 http://www. so all outgoing traffic will be forwarded to R1. we see that R1 is the active standby router for the Ethernet 0/0 link.exam.com/ .

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.

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http://www.exam.com/

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Refer to the exhibit. If router R1 interface Etherne0/0 goes down and recovers, which of the statement regarding HSRP priority is true?
A.
B.
C.
D.
E.

The interface will have the priority decremented by 40 for HSRP group 1.
The interface will have the priority decremented by 60 for HSRP group 1
The interface will have its current priority incremented by 40 for HSRP group 1
The interface will have its current priority incremented by 60 for HSRP group 1
The interface will default to the a priority of 100 for HSRP group 1

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However. They have questions about how these two devices will perform in the event of a device failure.exam. it will then increment it by 40 back to 130 for HSRP group 1. when the Ethernet 0/0 interface goes down. http://www.Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Here is the HSRP configuration seen on R1: Here. the standby 1 track decrement command will lower the priority from 130 to 90. QUESTION 20 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.com/ . when it comes back up.

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com/ .http://www.exam.

C. E. B.com/ . The HSRP group number mismatch The HSRP group authentication is misconfigured The HSRP Hello packets are blocked The HSRP timers mismatch The HSRP group priorities are different http://www.What issue is causing Router R1 and R2 to both be displayed as the HSRP active router for group 2? A. D.exam.

Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: Based on the configuration output. but not on R1: http://www.exam.com/ . we see that authentication is configured on R2.

http://www.exam.This can be further verified by issuing the "show standby" command on each router.com/ .

exam. They have questions about how these two devices will perform in the event of a device failure. http://www.QUESTION 21 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.com/ .

com/ .http://www.exam.

com/ .http://www.exam.

0c07.ac02 http://www.0010 0000.exam.0000.What is the virtual mac-address of HSRP group 1? A.0000. B. 0000. C.0c07.ac02 4000.com/ . D.0000.ac01 4000. E.ac01 4000.

0c07.F. http://www. 0000.com/ .exam.0010 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: Issuing the "show standby" command on either router shows us that the virtual MAC used by HSRP group 1 is 4000.0010.0000.

com/ .http://www.exam.

com/ http://www.com/ .exam.exam.http://www.