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300-115 cisco

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

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Sections
1. Layer 2 Technologies
2. Infrastructure Security
3. Infrastructure Services
4. Mix QUESTIONS

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Exam A
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: Layer 2 Technologies
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: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:

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

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D.cisco. Subsecond timing mechanisms detect traffic problems and immediately institute failover. E.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swstack.com/c/en/us/products/collateral/switches/catalyst-3750-series-switches/prod_white_paper09186a00801b096a.com/ . Figure 3. The engineer notices only a single neighbor that uses Cisco Discovery Protocol. B.html QUESTION 4 A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided. Cisco StackWise Technology Resilient Cabling Reference: http://www. as shown in Figure 3. What would cause the output to show only the single neighbor? http://www. C.Reference: http://www.exam. A break in any one of the cables will result in the stack bandwidth being reduced to half of its full capacity.cisco. but it has several routing neighbor relationships. 0 25 50 75 100 Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Physical Sequential Linkage The switches are physically connected sequentially. This mechanism restores dual path flow when the timing mechanisms detect renewed activity on the cable.html QUESTION 3 What percentage of bandwidth is reduced when a stack cable is broken? A.

CDP can be used to determine the physical topology. Cisco Discovery Protocol advertisements are inconsistent between the local and remote devices. Which vendor-neutral protocol could be used to resolve this issue? A. then each router will only have the single switch port that it connects to as its neighbor. D. Local Area Mobility Link Layer Discovery Protocol NetFlow Directed Response Protocol Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: http://www. but not necessarily the logical topology. Cisco Express Forwarding is enabled locally. QUESTION 5 After the implementation of several different types of switches from different vendors.com/ . C.A. D. B.exam. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: If all of the routers are connected to each other using a layer 2 switch. Even though multiple routing neighbors can be formed over a layer 2 network. C. IP routing is disabled on neighboring devices. The routers are connected via a Layer 2 switch. B. a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible. only the physical port that it connects to will be seen as a CDP neighbor.

exam. Configure a different native VLAN on all new switches that are configured as VTP clients. VTP allows a consistent view of the switched network across all switches. make sure that the password is the same on both sides. principally wired Ethernet. such as the Cisco Discovery Protocol (CDP). Provision one of the new switches to be the VTP server and duplicate information from the existing network. Reference: http://en.cisco.shtml QUESTION 7 After implementing VTP. The VTP domain name must match and it is case sensitive. Reference: http://www. VTP does not support extended VLANs and should be manually added to all switches.com/ . What must be done to fix this? A. One of the switches must be the VTP server in a VTP domain. password. There are several reasons why the VLAN information can fail to be exchanged. Make sure that no password is set between the server and client. the extended VLANs are not being propagated to other VTP switches. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name. B. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking. LLDP performs functions similar to several proprietary protocols.wikipedia. D. Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred. capabilities. http://www. CISCO and cisco are two different domain names. B.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. only Layer 2 EtherChannels propagate VLAN information. Make sure that the VLANs are active in all the devices. If any password is set. However. Verify these items if switches that run VTP fail to exchange VLAN information: VTP information only passes through a trunk port. and neighbors on an IEEE 802 local area network. C. Make sure that if EtherChannels are created between two switches.org/wiki/Link_Layer_Discovery_Protocol QUESTION 6 Several new switches have been added to the existing network as VTP clients. All of the new switches have been configured with the same VTP domain. VLANs are not passing from the VTP server (existing network) to the VTP clients. which supports extended VLAN propagation. Enable VTP version 3. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP allows switches to advertise VLAN information between other members of the same VTP domain. and version.The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity. What should be configured for extended VLANs? A. All VLAN changes must be done on this switch in order to have them propagated to the VTP clients.

C. Reference: http://www. and C are trunked together and have been properly configured for VTP. Ensure that all switches run the same Cisco IOS version.pdf QUESTION 8 Refer to the exhibit. the VLANs in the range 1006 to 4094 are removed from VTP control.com/en/US/docs/switches/lan/catalyst6500/ios/15.cisco. What is the most probable cause of this behavior? http://www. D. VTP authentication is required when using extended VLANs because of their ability to cause network instability. Switch C receives VLAN information from the VTP server Switch A.com/ . Switch A.1SY/config_guide/sup2T/vtp. You must configure extended-range VLANs manually on each network device. Extended VLANs will not propagate to different IOS versions when extended VLANs are in use. B.exam. If you convert from VTP version 3 to VTP version 2. VTP version 3 supports extended-range VLANs (VLAN numbers 1006 to 4094). Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP version 1 and VTP version 2 do not propagate configuration information for extended-range VLANs (VLAN numbers 1006 to 4094). but Switch B does not receive any VLAN information.

B. but transparent switches do forward VTP advertisements that they receive out their trunk ports in VTP Version 2. but Switch C is not receiving traffic from certain VLANs.exam. D. Switch B is configured in transparent mode.A.com/ . B.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP transparent switches do not participate in VTP. Switch A.cisco. while Switch C is configured with a trunk port to Switch B. Switch B has all VLANs. The trunk between Switch A and Switch B is misconfigured. The VTP revision number of Switch B is higher than that of Switch A. 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. http://www. D.shtml QUESTION 9 Refer to the exhibit. C. What would cause this issue? A. A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements. B. A VTP authentication mismatch occurred between Switch A and Switch B. VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface that is connected to Switch C. C. Reference: http://www. and C are trunked together and have been properly configured for VTP. Switch B is configured with an access port to Switch A.

The backup port applies only when a single switch has two links to the same segment (collision domain). Without VTP pruning. The best explanation for why switch C is not seeing traffic from only some of the VLANs.Correct Answer: C Section: Layer 2 Technologies 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. The alternative port moves to the forwarding state if there is a failure on the designated port for the segment. VTP pruning blocks unneeded flooded traffic to VLANs on trunk ports that are included in the pruning-eligible list. multicast. The new switches are using RSTP instead of legacy IEEE 802. B. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: RSTP works by adding an alternative port and a backup port compared to STP. D.1D STP and PortFast have been configured by default on all newly implemented Cisco Catalyst switches. the network engineer notices that the port roles that were once “blocking” are now defined as “alternate” and “backup. 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. This path is different than using the root port.cisco.exam. VTP pruning is disabled by default.1D STP. IEEE 802. The administrator has defined the switch as the root in the STP domain. a switch floods broadcast.html QUESTION 11 http://www. is that VTP pruning has been configured. * Backup port – A backup/redundant path to a segment where another bridge port already connects. The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco Catalyst switches. These ports are allowed to immediately enter the forwarding state rather than passively wait for the network to converge. QUESTION 10 After the recent upgrade of the switching infrastructure.” What is the reason for this change? A. To have two links to the same collision domain. C.com/ . the switch must be attached to a hub. and unknown unicast traffic across all trunk links within a VTP domain even though receiving switches might discard them. * Disabled port – Not strictly part of STP.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146. a network administrator can manually disable a port Reference: http://www.

multicast.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/vtp.cisco. access lists DTP in nonegotiate VTP pruning PBR Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic. After testing. unknown.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146. What is the reason for this? A. VTP pruning is disabled. C. In switched networks today. 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/ .An administrator recently configured all ports for rapid transition using PortFast.cisco. The switch does not have the processing power to ensure rapid transition for all ports. not on trunk links.html#wp1020444 http://www. D. This makes them candidates for rapid transition to the forwarding state. such as broadcast. The link type is automatically derived from the duplex mode of a port. and flooded unicast packets to only the switches that require it. By default. while a half-duplex port is considered as a shared port by default.html QUESTION 12 Which technique automatically limits VLAN traffic to only the switches that require it? A. RSTP has been enabled per interface and not globally. This automatic link type setting can be overridden by explicit configuration. most links operate in full-duplex mode and are treated as point-to-point links by RSTP. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: RSTP can only achieve rapid transition to the forwarding state on edge ports and on point-to-point links. B. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. it has been determined that several ports are not transitioning as they should. B. Reference: http://www. D. A port that operates in full-duplex is assumed to be point-to-point. STP is unable to achieve rapid transition for trunk links.exam. C. Reference: http://www.

The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes. Correct Answer: A Section: Layer 2 Technologies 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. ARP requests will be processed less frequently by the switch. D. This is how long a dynamic MAC address will remain in the CAM table. C.QUESTION 13 What effect does the mac address-table aging-time 180 command have on the MAC address-table? A. perform this task: http://www.exam. To configure the aging time for all MAC addresses.com/ . B. E. The MAC address-table will be flushed every 3 minutes. The default timeout period will be 360 seconds.

D. a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber. E. As designed. C.com/ . the link was placed into a non-forwarding state due to a fault with UDLD. macros errdisable autorecovery IP Event Dampening command aliases Bidirectional Forwarding Detection Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: http://www.cisco. the link did not recover. B.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. After the damaged cable was replaced.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/CLIConfigurationGuide/MACAddress. What solution allows the network switch to automatically recover from such an issue? A.exam.html#wp1126206 QUESTION 14 While working in the core network building.

net/blog/2009/sep/14/errdisable-autorecovery/ QUESTION 15 A network engineer deployed a switch that operates the LAN base feature set and decides to use the SDM VLAN template. such as the detection of a loopback. Reference: http://www. as opposed to the original access control entries (ACEs) configured by the user. by removing an unapproved device) without the need for administrative intervention. There is no way to edit template category individual values. D. The SDM template is causing the CPU of the switch to spike during peak working hours. the network administrator notices that not all traffic is being replicated to the management server. The SDM VLAN template causes the MAC address-table to overflow. or a broadcast storm. The switch needs to be rebooted before the SDM template takes effect. The VLAN receives additional frames from neighboring switches. C. and (ideally) correct the issue. B. The idea behind requiring administrative action is so that a human engineer can intercede.com/ . What is the root cause of this issue? A. Reference: http://packetlife. This gives the offending issue a chance to be cleared by the user (for example. http://www. UDLD failure. The first eight lines (up to Security ACEs) represent approximate hardware boundaries set when a template is used. manual intervention by an administrator is necessary to restore the interface to working order. and a steady recurrence of these can amount to a huge time sink for the administrative staff. some configurations may be prone to accidental violations.exam. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: SDM Template Notes: All templates are predefined. If the boundary is exceeded. After configuring SPAN to monitor this port. Choosing the VLAN template will actually disable routing (number of entry for unicast or multicast route is zero) in hardware. We can configure the switch to automatically re-enable any error-disabled interfaces after a specified timeout period. this can be done by issuing shutdown followed by no shutdown on the interface. The switch reload is required to use a new SDM template.html QUESTION 16 An access switch has been configured with an EtherChannel port. The ACL merge algorithm. generate the number of TCAM entries listed for security and QoS ACEs.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/44921-swdatabase-3750ss-44921. This is where errdisable autorecovery can be of great assistance.cisco. VLAN filters are required to ensure traffic mirrors effectively. What is a cause for this issue? A. assess. However. all processing overflow is sent to the CPU which can have a major impact on the performance of the switch.There are a number of events which can disable a link on a Catalyst switch. The VLAN template disables routing in hardware. By default.

html#wp1040905 QUESTION 17 Refer to the exhibit. D. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: A source port or EtherChannel is a port or EtherChannel monitored for traffic analysis.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/span. You can configure ports or EtherChannels in any VLAN as SPAN sources. A port-channel interface (an EtherChannel) can be a SPAN source.B. The port channel can be used as a SPAN source. SPAN encapsulation replication must be enabled to capture EtherChannel destination traffic. http://www.com/ .exam.cisco. You can configure both Layer 2 and Layer 3 ports and EtherChannels as SPAN sources. but not a destination. C. but not a destination. Reference: http://www. SPAN can monitor one or more source ports or EtherChannels in a single SPAN session. Trunk ports or EtherChannels can be configured as sources and mixed with nontrunk sources. RSPAN must be used to capture EtherChannel bidirectional traffic.

exam. D.com/ . 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. C. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: An etherchannel will form if one end is active and the other is passive. The EtherChannels would form and both devices would use the dst-ip load-balancing method because Switch1 is configured with EtherChannel mode active. The EtherChannels would not form because the load-balancing method must match on the devices. The EtherChannels would form. B.What is the result of the configuration? A. The table below summarizes the results for LACP channel establishment based on the configuration of each side of a link: LACP Channel Establishment http://www.

Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: After you configure an EtherChannel. Therefore. you cannot configure Storm Control on some of the members of an EtherChannel.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/54sg/configuration/guide/config/channel. although each switch involved in the etherchannel can have non matching parameters for load balancing. or LACP) use the same load-balancing.com/ .cisco. all channels (manually configured. D. B.html QUESTION 19 What is the function of NSF? A. but will only be present on the physical interfaces. For example. The configuration will be rejected because storm control is not supported for EtherChannel. Reference: http://www. any configuration that you apply to the port-channel interface affects the EtherChannel. Storm Control must be configured on all or none of the ports. PagP. forward traffic simultaneously using both supervisors http://www. Reference: http://www. The storm control configuration will be accepted. The settings will be applied to the EtherChannel bundle and all associated physical interfaces. What is the result of the configuration? A. If you configure Storm Control on only some of the ports. As a result.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/31sg/configuration/guide/conf/channel. you should configure Storm Control at the EtherChannel Interface level. any configuration that you apply to the physical interfaces affects only the interface where you apply the configuration. Storm Control is an exception to this rule.cisco.html#wp1020804 QUESTION 18 A network engineer tries to configure storm control on an EtherChannel bundle. C. but not on the associated physical ports. The storm control settings will appear on the EtherChannel. This is true for the switch globally.Load balancing can only be configured globally. those ports will be dropped from the EtherChannel interface (put in suspended state).exam. and not at the physical interface level.

VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE. 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. The port then transitions into the errdisable state. UDLD is enabled globally.com/article-cisco-catalyst-6500-series-vss-1440-124536783.html http://www. a Network Administrator noticed that one port stops receiving UDLD packets. UDLD tries to reestablish the connection with the neighbor. provide automatic failover to back up supervisor in VSS mode D. In a VSS. Which option describes what causes the port to go into the errdisable state? A. UDLD timers are inconsistent. forward traffic based on Cisco Express Forwarding C. Switches would operate as a single logical virtual switch called a virtual switching system 1440 (VSS1440). Reference: http://ciscorouterswitch. when a port on a bidirectional link that has a UDLD neighbor relationship established stops receiving UDLD packets. provide nonstop forwarding in the event of failure of one of the member supervisors Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VSS is network system virtualization technology that pools multiple Cisco Catalyst 6500 Series Switches into one virtual switch.exam. B.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/udld. C.4 Tbps. combining for an active 1400-Gbps switching capacity per VSS. Only one of the virtual switch members has the active control plane.B.html QUESTION 20 After UDLD is implemented. After eight failed retries. increasing operational efficiency. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: With UDLD aggressive mode enabled. and scaling system bandwidth capacity to 1. boosting nonstop communications. This port continues to reestablish until after eight failed retries.over-blog. Reference: http://www. D.com/ . UDLD port is configured in aggressive mode. 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. the port is disabled.cisco. Normal UDLD operations that prevent traffic loops.

com/ . C. D. The bidirectional status of “unknown” indicates that the port will go into the disabled state because it stopped receiving UDLD packets from its neighbor. Which spanning-tree technology is used to accomplish backup root port selection? A.QUESTION 21 After reviewing UDLD status on switch ports. D. E. Reference: http://packetlife.” Which statement describes what this indicates about the status of the port? A. B. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: By default. UDLD moved into aggressive mode after inconsistent acknowledgements were detected. STP immediately replaces the root port with an alternative root port.exam. F. C. UDLD is disabled on all interfaces. It would be prohibitively difficult to coordinate the configuration of UDLD on both ends of a link at the same time. so when UDLD is first enabled and does not detect a neighbor the link state is considered unknown. the status will transition to bidirectional. PVST+ PortFast BackboneFast UplinkFast Loop Guard UDLD Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: http://www. or individually on specific interfaces with the command udld port.net/blog/2011/mar/7/udld/ QUESTION 22 Pilot testing of the new switching infrastructure finds that when the root port is lost. The port is fully operational and no known issues are detected. The port will remain operational during this time. an engineer notices that the. When UDLD is finally enabled on the other end. which is not necessarily an error condition. The UDLD port is placed in the “unknown” state for 5 seconds until the next UDLD packet is received on the interface. B. We can enable UDLD globally on the device. This enables UDLD in normal mode.

only one of which is forwarding at any given time. Switches send and receive spanning-tree frames.html QUESTION 23 A network engineer must adjust the STP interface attributes to influence root port selection. port-priority cost forward-timers link type root guard Correct Answer: AB Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Spanning tree forces redundant data paths into a standby (blocked) state.html QUESTION 24 A network engineer must set the load balance method on an existing port channel. as it would with the normal spanning-tree procedures. and path cost.I f a switch loses connectivity. except for self-looping ports. 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. BPDUs contain information about the sending switch and its ports. it begins using the alternate paths as soon as the spanning tree selects a new root port. an uplink group consists of the root port (which is forwarding) and a set of blocked ports.) A. Which two elements are used to accomplish this? (Choose two.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/configuration/guide/scg_2960/swstpopt. B.cisco. The path cost value represents the media speed. 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. D. The root port transitions to the forwarding state immediately without going through the listening and learning states. called bridge protocol data units (BPDUs). Reference: http://www. the spanningtree algorithm recalculates the spanning-tree topology and activates the standby path. 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. Reference: http://www. Configure the new load balancing method using port-channel load-balance. C. switch priority.com/ . at regular intervals. you can accelerate the choice of a new root port when a link or switch fails or when the spanning tree reconfigures itself. including switch and MAC addresses. By enabling UplinkFast with the spanningtree uplinkfast global configuration command. E. If a network segment in the spanning tree fails and a redundant path exists.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swstp. port priority. Which action must be done to apply a new load balancing method? A.cisco. The switches do not forward these frames but use them to construct a loop-free path. An uplink group is a set of Layer 2 interfaces (per VLAN). UplinkFast provides fast convergence after a direct link failure and achieves load balancing between redundant Layer 2 links using uplink groups. http://www. When two ports on a switch are part of a loop. The uplink group provides an alternate path in case the currently forwarding link fails.exam. Specifically.

com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. There is a speed mismatch on the interface.com/ .cisco. Adjust the switch SDM back to “default”. D.html QUESTION 25 Refer to the exhibit. http://www. C. B. EtherChannel load balancing can use MAC addresses or IP addresses. There is a layer 1 physical issue. 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. Ensure that IP CEF is enabled globally to support all load balancing methods. or both source and destination addresses.B. The mode applies to all EtherChannels that are configured on the switch. Reference: http://www. source or destination addresses. A network engineer investigates a recent network failure and notices that one of the interfaces on the switch is still down. Correct Answer: A Section: Layer 2 Technologies Explanation 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.exam. The interface is configured as the target of the SPAN session. What is causing the line protocol on this interface to be shown as down? A. C. Upgrade the PFC to support the latest load balancing methods.

cisco. Reference: http://sbkb. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: With the SAPN destination port.exam. It allows you to track instances even if the native VLAN ID or port duplex states do not match between connecting devices. E. This is the default version on all switches.shtml QUESTION 26 While doing network discovery using Cisco Discovery Protocol.com/ . B.xml&pid=2&converted=0 QUESTION 27 Which technique allows specific VLANs to be strictly permitted by the administrator? http://www.D. it is found that rapid error tracking is not currently enabled.com/CiscoSB/GetArticle.cisco. Reference: http://www. the state of the destination port is up/down by design. which is used to track down errors and minimize costly downtime. The interface is configured as the source of the SPAN session. CDP Version 2 — This is the most recent version of CDP which has enhanced features such as rapid reporting mechanism. Which option must be enabled to allow for enhanced reporting mechanisms using Cisco Discovery Protocol? A. This version is mainly used for backward compatibility. 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. 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: Layer 2 Technologies Explanation Explanation/Reference: CDP Version 1 — This is the first version of CDP which was used for the discovery of Cisco devices in the network. E.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c612. There is a duplex mismatch on the interface. C. This is the normal operational state for SPAN destinations.aspx? docid=0ed03cbac49b446ab390a657917d817c_Cisco_Discovery_Protocol_CDP__Properties_Settings_on_Sx500_S.

You must manually configure the neighboring interface as a trunk interface to establish a trunk link. otherwise the link will be a non-trunking link. Which two actions can prevent interface trunking? (Choose two. Enable switchport block on access ports.) A. Disable DTP on a per interface basis. but may be disabled.1_13_ea1/configuration/guide/swvlan. However. D. B.cisco. 1 to 4094. C.html QUESTION 28 For security reasons. and is enabled by default. C.exam. configure “switchport nonegotiate. use the “switchport trunk allowed vlan remove vlan-list” interface configuration command to remove specific VLANs from the allowed list. you can remove VLANs from the allowed list. Configure trunk and access interfaces manually. a trunk port sends traffic to and receives traffic from all VLANs. http://www.” This prevents the interface from generating DTP frames. You can use this command only when the interface switchport mode is access or trunk. VTP pruning transparent bridging trunk allowed VLANs VLAN access-list L2P tunneling Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: By default. D. To disable DTP.A. preventing traffic from those VLANs from passing over the trunk. DTP causes increased traffic. the IT manager has prohibited users from dynamically establishing trunks with their associated upstream switch. E. Correct Answer: AB Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The Dynamic Trunking Protocol (DTP) is used to negotiate forming a trunk between two Cisco devices. All VLAN IDs.com/en/US/docs/switches/lan/catalyst3550/software/release/12. B. Apply BPDU guard and BPDU filter.com/ . are allowed on each trunk. Reference: http://www. To restrict the traffic a trunk carries.

cisco. Verify connected trunk ports. Reference: https://learningnetwork.PDF QUESTION 30 A network is running VTPv2. B.com/articles/article.ciscopress. F. PPP DTP ISL HDLC DLCI DOT1Q Correct Answer: CF Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Switches such as the Catalyst 3550 that are capable of either 802. Which action resolves this problem? A. C.com/servlet/JiveServlet/previewBody/14792-102-1-57313/Dynamic%20Trunking%20Protocol. Reload the new switch. After verifying all VTP settings. B. the network engineer notices that the new switch is not receiving the list of VLANs from the server.exam. the switchport trunk encapsulation [dot1q | isl | negotiate] interface command must be used prior to the switchport mode trunk command. Restart the VTP process on the new switch. D. The first thing that should be done is to verify that the trunk http://www. Reload the VTP server. C. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP should never need to have the switch reloaded or the VTP process to restart in order for it to work. D.1Q or ISL trunking encapsulation.asp?p=2181837&seqNum=8 QUESTION 29 Which two protocols can be automatically negotiated between switches for trunking? (Choose two.) A.Reference: http://www.com/ . E.

After each update to the VTP server. the key associated with the password is saved in hexadecimal format in the running configuration. Support for extended range VLAN (VLANs 1006 to 4094) database propagation.ports are connected and up. D. QUESTION 31 After configuring new data VLANs 1020 through 1030 on the VTP server. you can directly configure the password secret key. the secret key from the password string is saved in the VLAN database file. you cannot convert from VTP version 3 to version 1 or 2. Another switch in the domain has a higher revision number than the server. it takes up to 4 hours propagate. Instead.exam. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing the extended LAN segment? http://www. What is the problem? A. VTP must be stopped and restarted on the server.html#wp1316856 QUESTION 32 A network engineer is extending a LAN segment between two geographically separated data centers.cisco. You must reenter the password if you enter a takeover command in the domain.2_52_se/configuration/guide/swvtp. B. The VTP server must be reloaded. Reference: http://www. but it does not appear in plain text in the configuration. The VTP version number must be set to version 3. a network engineer notices that none of the VTP clients are receiving the updates. When hidden.com/ . Correct Answer: B Section: Layer 2 Technologies 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. VTP versions 1 and 2 propagate only VLANs 1 to 1005. E. C. If extended VLANs are configured.com/en/US/docs/switches/lan/catalyst3560/software/release/12. When you enter the secret keyword.

and 30) are allowed to traverse the switch trunk interface. Modify the spanning-tree priorities to dictate the traffic flow.shtml QUESTION 33 The network manager has requested that several new VLANs (VLAN 10. The command effectively removed all other working VLANs and replaced them with the new VLANs. What is the root cause of the problem? A. Allowing additional VLANs across the trunk introduced a loop in the network. VTP pruning is the best choice. After the command switchport trunk allowed vlan 10. VTP pruning removed all unused VLANs.cisco.A.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. Correct Answer: C Section: Layer 2 Technologies 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. Configure manual trunk pruning between the two locations.com/ . VTP pruning—Avoid this method if the goal is to reduce the number of STP instances.20. the method runs the pruned VLAN on trunks. and it avoids the use of the spanning tree. C. B. Create a Layer 3 transit VLAN to segment the traffic between the sites. Reference: http://www. D.30 is issued. VTP-pruned VLANs do not reduce the number of spanning tree port instances. Therefore. D.exam. Since the question asked for the choice that is an enhancement to the STP design. 20. Correct Answer: A Section: Layer 2 Technologies http://www. Instead. VTP-pruned VLANs on a trunk are still part of the spanning tree. all other existing VLANs no longer pass traffic over the trunk. C. B. ISL was unable to encapsulate more than the already permitted VLANs across the trunk. Use VTP pruning on the trunk interfaces.

Correct Answer: D http://www.com/document/11836/how-define-vlans-allowed-trunk-link QUESTION 34 When you design a switched network using VTPv2.com/ . You would also need to explicitly allow the other working VLANs to this configuration command. C.exam. It allows control traffic to pass using the non-default VLAN. Only VTP version 3 supports extended VLANs (1-4095). F. D. E. B. 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. how many VLANs can be used to carry user traffic? A. All frames within the native VLAN are tagged. C. B. Reference: https://supportforums. 1000 1001 1024 2048 4095 4096 Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP versions 1 and 2 Supports normal VLAN numbers (1-1001). and overwrite any others that were previously defined. D. Control traffic is tagged. It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s).Explanation Explanation/Reference: Explanation: The “switchport trunk allowed vlan” command will only allow the specified VLANs.com/2012/11/difference-between-vtp-versions. except when the native VLAN is set to 1.blogspot.html QUESTION 35 What does the command vlan dot1q tag native accomplish when configured under global configuration? A. Reference: http://cciememo.cisco.

D. allowed VLAN list VTP pruning VACL L2P tunneling Correct Answer: A Section: Layer 2 Technologies Explanation http://www.exam. LLDP performs functions similar to several proprietary protocols. so the open standard protocol must be configured. including control traffic. capabilities.Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The “vlan dot1q tag native” will tag all untagged frames.com/ .wikipedia. Which option can be configured to accomplish this? A. QUESTION 36 A network engineer has just deployed a non-Cisco device in the network and wants to get information about it from a connected device. IRDP LLDP NDP LLTD Correct Answer: B Section: Layer 2 Technologies 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. C. Cisco Discovery Protocol is not supported. Reference: http://en. B. with the defined native VLAN. B. Which protocol does the network engineer configure on both devices to accomplish this? A. principally wired Ethernet. D.org/wiki/Link_Layer_Discovery_Protocol QUESTION 37 A manager tells the network engineer to permit only certain VLANs across a specific trunk interface. C. such as the Cisco Discovery Protocol (CDP). and neighbors on an IEEE 802 local area network.

all of the configured VLANs are allowed to send and receive traffic across the link. For Integrated Cisco IOS Software based switches. enable the STP PortFast feature. D. B.com/library/content. The port still participates in STP. Note: The allowed VLAN list on both the ends of the trunk link should be the same.exam. However. perform these steps: 1.24 Switch-C(config-if-range)# sp–nning-tree portfast Reference: http://www.com/ .com/document/11836/how-define-vlans-allowed-trunk-link QUESTION 38 For client server failover purposes. they require the switchport to enter a forwarding state immediately. PortFast immediately transitions the port into STP forwarding mode upon linkup. So if the port is to be a part of the loop. the port eventually transitions into STP blocking mode.aspx?b=CCNP_Studies_Switching&seqNum=36 QUESTION 39 Which command does a network engineer use to verify the spanning-tree status for VLAN 10? http://www. VLANs 1 through 1005 are allowed on each trunk by default. This keeps traffic from the VLANs from passing over the trunk link. the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state. C. Rapid Spanning-Tree Spanning-Tree Timers Spanning-Tree FastPort Spanning-Tree PortFast Spanning-Tree Fast Forward Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: In order to allow immediate transition of the port into forwarding state. Reference: https://supportforums. This removes specific VLANs from the allowed list. issue the switchport trunk vlan-Iist interface configuration command.Explanation/Reference: Explanation: When a trunk link is established. For their disaster recovery feature to operate successfully. Which spanningtree feature satisfies this requirement? A. VLAN traffic can be removed from the allowed list.cisco. E. Example configuration: Switch-C# configure terminal Switch-C(config)# interface range fa0/3 .informit. To restrict the traffic that a trInk carries.

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: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Example output: SW2#show spanning-tree vlan 10 VLAN0010 Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014.html http://www.com/ .cisco.232 Type --------------------------P2p P2p Reference: http://www. C.exam.Nbr -------128.4180 Cost 9 Port 216 (Port-channel21) Hello Time 2 sec Max Age 20 sec Bridge ID Priority Address Hello Time Aging Time Interface ------------------Po21 Po23 Role ---Root Altn Forward Delay 15 sec 32778 (priority 32768 sys-id-ext 10) 001c.f2d2.9000 2 sec Max Age 20 sec Forward Delay 15 sec 300 sec Sts --FWD BLK Cost --------9 9 Prio.216 128. D.A.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2. B.57d8.

Summary advertisements – sent out every 300 seconds and every time a change occurs on the VLAN database.net/configuring-cisco-vtp/ QUESTION 41 A network engineer is setting up a new switched network. C.QUESTION 40 A new network that consists of several switches has been connected together via trunking interfaces. RSTP PVST MST PVST+ RPVST+ Correct Answer: C Section: Layer 2 Technologies Explanation http://www. If the switch hears a VTP advertisement it will automatically learn the VTP domain name. The switch with the non-default domain name restores back to "null" upon reboot.exam.com/ . B. a switch will have a domain name of NULL and no password. E.dionicio. C. B. and the configuration revision number. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: By default. Switches with higher revisio“ num”ers does not accept the new domain name. Contained in a summary advertisement: VTP version Domain name Configuration revision number Time stamp MD5 encryption hash code Reference: https://rowell. All other switches with the default domain name become VTP clients. If all switches currently have the default VTP domain name "null". The network is expected to grow and add many new VLANs in the future. D. D. VTP summary advertisements are sent out of all ports with the new domain name. VLANs. which statement describes what happens when“a do”ain name is configured on one of the switches? A. Which Spanning Tree Protocol should be used to reduce switch resources and managerial burdens that are associated with multiple spanning-tree instances? A.

Figure 3-15: VLAN Load Balancing Figure 3-15 illustrates two links and 1000 VLANs. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies.com/ . C. SDM templates are used to configure system resources in the switch to optimize support for specific features. Correct Answer: A Section: Layer 2 Technologies http://www.exam. SDM templates are used to configure ACLs that protect networks and specific hosts from unnecessary or unwanted traffic. B. on the other hand. depending on how the switch is used in the network. Figure 3-15 shows a common network design. and the network administrator typically seeks to achieve load balancing on the access switch uplinks based on even or odd VLANs—or any other scheme deemed appropriate. 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. uses a minimum number of STP instances to match the number of physical topologies present. there are 1000 VLANs.blogspot.com/2011/05/chapter-03-implementing-spanning-tree_19. MST. E. connected to two Building Distribution submodule Switches D1 and D2. 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.html QUESTION 42 Which statement about the use of SDM templates in a Cisco switch is true? A. The 1000 VLANs map to two MST instances. each switch needs to maintain only two spanning trees. reducing the need for switch resources. Rather than maintaining 1000 spanning trees.1w RST algorithm to multiple spanning trees. featuring an access Switch A. In this setup. Reference: http://ciscodocuments.Explanation/Reference: Explanation: Multiple Spanning Tree (MST) extends the IEEE 802. 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. SDM templates are configured by accessing the switch using the web interface. D.

depending on how the switch is used in the network.2_55_se/configuration/guide/swsdm.exam.2_55_se/configuration/guide/swsdm.com/ . Routing — The routing template maximizes system resources for Ipv4 unicast routing. To allocate hardware resources for different usages. default http://www. Default — The default template gives balance to all functions. B. 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. use the default template to balance resources. Reference: http://www. C.com/en/US/docs/switches/lan/catalyst3560/software/release/12. Reference: http://www. You can select a template to provide maximum system usage for some functions. It would typically be selected for a Layer 2 switch.cisco. VLAN access default routing Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages. for example. D. the switch SDM templates prioritize system resources to optimize support for certain features. and use access template to obtain maximum ACL usage.Explanation Explanation/Reference: Explanation: You can use SDM templates to configure system resources in the switch to optimize support for specific features. VLAN B. the switch SDM templates prioritize system resources to optimize support for certain features. VLANs — The VLAN template disables routing and supports the maximum number of unicast MAC addresses.pdf QUESTION 43 Which SDM template disables routing and supports the maximum number of unicast MAC addresses? A.cisco. typically required for a router or aggregator in the center of a network.pdf QUESTION 44 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/catalyst3750x_3560x/software/release/12.

com/en/US/docs/switches/lan/catalyst3560/software/release/12. typically required for a router or aggregator in the center of a network. 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.cisco. It would typically be selected for a Layer 2 switch. access D. perform this task: http://www. B. Routing—The routing template maximizes system resources for Ipv4 unicast routing. Default—The default template gives balance to all functions. D. Reference: http://www. routing Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages.exam.pdf QUESTION 45 In a Cisco switch.C. the switch SDM templates prioritize system resources to optimize support for certain features. what is the default period of time after which a MAC address ages out and is discarded? A. C. VLANs—The VLAN template disables routing and supports the maximum number of unicast MAC addresses (clients).com/ . 100 seconds 180 seconds 300 seconds 600 seconds Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: To configure the aging time for all MAC addresses.2_55_se/configuration/guide/swsdm.

Mac-address-table notification mac-move [counter [syslog]] no mac-address-table notification mac-move [counter [syslog]] Syntax Description http://www.exam.cisco. To disable MAC-move notification.com/ . when is a syslog message generated? A. More than 64 MAC addresses are added to the content-addressable memory. A new MAC address is added to the content-addressable memory.Reference: http://www. B. use the mac-address-table notification mac-move command in global configuration mode. A MAC address or host moves between different switch ports. C. use the no form of this command. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: mac-address-table notification mac-move To enable MAC-move notification. A new MAC address is removed from the content-addressable memory.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/MACAddress.html QUESTION 46 If a network engineer applies the command mac-address-table notification mac-move on a Cisco switch port. D.

30 seconds http://www.exam. B.com/ . C.html QUESTION 47 Which option is a possible cause for an errdisabled interface? A.shtml QUESTION 48 What is the default value for the errdisable recovery interval in a Cisco switch? A.cisco.com/en/US/docs/ios/lanswitch/command/reference/lsw_m1.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b. Reference: http://www.Usage Guidelines MAC-move notification generates a syslog message whenever a MAC address or host moves between different switch ports.cisco. D. The reason can be: Duplex mismatch 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. routing loop cable unplugged STP loop guard security violation Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: There are various reasons for the interface to go into errdisable.

The show errdisable recovery command shows the default error-disable recovery state for all the possible conditions. 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. 600 seconds Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: After you fix the root problem. 100 seconds C.exam. by default.-------------udld Disabled bpduguard Disabled security-violatio Disabled channel-misconfig Disabled pagp-flap Disabled dtp-flap Disabled link-flap Disabled l2ptguard Disabled psecure-violation Disabled gbic-invalid Disabled dhcp-rate-limit Disabled mac-limit Disabled unicast-flood Disabled arp-inspection Disabled Timer interval: 300 seconds Interfaces that will be enabled at the next timeout: Note: The default timeout interval is 300 seconds and.cisco. cat6knative#show errdisable recovery ErrDisable Reason Timer Status ----------------. 43sernads D. the ports are still disabled if you have not configured errdisable recovery on the switch.shtml QUESTION 49 Which statement about LLDP-MED is true? http://www. the timeout feature is disabled.B. The errdisable recovery command allows you to choose the type of errors that automatically reenable the ports after a specified amount of time.com/ . Reference: http://www.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.

when a switch is configured to use VTP versions 1 or 2? A. C. It specifically provides support for voice over IP (VoIP) applications and provides additional TLVs for capabilities discovery.A. Power over Ethernet.1q frame? http://www.com/ . and inventory management. C. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP version 1 and version 2 support VLANs 1 to 1000 only.com/en/US/docs/switches/metro/me3400/software/release/12. B. LLDP-MED is an extension to LLDP that operates only between endpoint devices. Reference: http://www.2_58_se/configuration/guide/swlldp. LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices. transparent client server Extended VLANs are only supported in version 3 and not in versions 1 or 2. D. LLDP-MED is an extension to LLDP that operates between routers that run BGP.pdf QUESTION 50 Which VTP mode is needed to configure an extended VLAN.2SX/configuration/guide/vtp. If converting from VTP version 3 to VTP version 2. VLANs in the range 1006 to 4094 are removed from VTP control.html QUESTION 51 What is the size of the VLAN field inside an 802. Extended-range VLANs are supported only in VTP version 3. network policy. LLDP-MED is an extension to LLDP that operates only between network devices.exam.com/en/US/docs/switches/lan/catalyst6500/ios/12. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: LLDP for Media Endpoint Devices (LLDP-MED) is an extension to LLDP that operates between endpoint devices such as IP phones and network devices such as switches.cisco. Reference: http://www. D. B.cisco.

1Q QUESTION 52 What is the maximum number of VLANs that can be assigned to an access switchport without a voice VLAN? A. the port should be configured as a trunk port. All other values may be used as VLAN identifiers. D. B.com/ .exam.wikipedia. 0 1 2 1024 Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: A standard (non-voice VLAN port) access switch port can belong to only a single VLAN. C. http://www.org/wiki/IEEE_802. The hexadecimal values of 0x000 and 0xFFF are reserved. allowing up to 4.094 VLANs Reference: http://en. C. B. 8-bit 12-bit 16-bit 32-bit Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The VLAN field is a 12-bit field specifying the VLAN to which the frame belongs.A. If more than one VLAN is needed. D. QUESTION 53 Refer to the exhibit.

B. http://www.exam.com/ .Which option shows the expected result if a show vlan command is issued? A.

QUESTION 54 Which feature is automatically enabled when a voice VLAN is configured.C. Obviously. so even though Cisco IOS will accept both. portfast B. a port can not be both. port-security http://www. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: In this case.exam. D.com/ . but not automatically disabled when a voice VLAN is removed? A. the port will actually be used as a trunk. the port has been configured both as a trunk and as a switchport in data vlan 10. ignoring the switchport access VLAN 10 command.

exam. spanning tree D.cisco. storm control Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Voice VLAN Configuration Guidelines You should configure voice VLAN on switch access ports. Reference: http://www. Use the show vlan privileged EXEC command to see if the VLAN is present (listed in the display).1q header found? A. The Port Fast feature is automatically enabled when voice VLAN is configured.C.com/en/US/docs/switches/lan/catalyst2950/software/release/12. The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN.com/ . within the Ethernet header within the Ethernet payload within the Ethernet FCS within the Ethernet source MAC address Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Frame format http://www.html QUESTION 55 In which portion of the frame is the 802. When you disable voice VLAN. C.1_22_ea11x/configuration/guide/swvoip. B. the Port Fast feature is not automatically disabled. D.

com/VTP-Pruning. By default. port-security http://www. D.wikipedia.org/wiki/IEEE_802.orbit-computer-solutions. VLANs 1-1001 VLANs 1-4094 VLANs 2-1001 VLANs 2-4094 Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP pruning should only be enabled on VTP servers.exam. B.1Q does not encapsulate the original frame.com/ . Reference: http://www. Both VTP versions 1 and 2 supports pruning. Instead. for Ethernet frames. but VLAN 1 can’t be pruned because it’s an administrative VLAN.php QUESTION 57 Which feature must be enabled to eliminate the broadcasting of all unknown traffic to switches that are not participating in the specific VLAN? A.Insertion of 802. C.1Q QUESTION 56 Which VLAN range is eligible to be pruned when a network engineer enables VTP pruning on a switch? A.1Q tag in an Ethernet frame 802. VLANs 2 – 1001 are pruning eligible. VTP pruning B. all the clients in the VTP domain will automatically enable VTP pruning. it adds a 32-bit field between the source MAC address and the EtherType/length fields of the original frame Reference: http://en.

there are occasions when VTP can create unnecessary traffic. All switches in the network receive all broadcasts.1q.C. Update the VTP revision number. Disable VTP pruning and disable 802.exam. Reference: http://www. so to enable vlan 10 on this switch you will first need to change the VTP mode from client to server. http://www.html#vtp_pruning QUESTION 58 Refer to the exhibit. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic.com/ . All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN. Which action resolves this problem? A.com/c/en/us/support/docs/lan-switching/vtp/10558-21. However. The users in an engineering department that connect to the same access switch cannot access the network. Change VTP mode to server and enable 802. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Only VTP servers can add new VLANs to the switched network.1q. D. storm control D. Enable VTP pruning and disable 802.1q. even in situations in which few users are connected in that VLAN. C. The network engineer found that the engineering VLAN is missing from the database. bpdguard Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP ensures that all switches in the VTP domain are aware of all VLANs. B.cisco.

1Q trunking to pass this new VLAN along to the other switches.exam. you will need to enable 802. Which action resolves this problem? http://www.com/ .Then. but users in company A are not able to access network resources in company B when DTP is enabled. The network switches for two companies have been connected and manually configured for the required VLANs. QUESTION 59 Refer to the exhibit.

Disable DTP and document the VTP domain mismatch. Consider that this is a multivendor environment. Enable the company B switch with the vtp mode server command. The VTP domain names do match and they are both VTP servers so there are no issues there. D. B. B.1Q and ISL. Correct Answer: C Section: Layer 2 Technologies 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. only 802.A. Which Cisco IOS switching feature can be used to achieve the task? A. 802. but version 1 does not. Cisco Discovery Protocol version 2 carries native VLAN information.exam. QUESTION 61 Which statement about using native VLANs to carry untagged frames is true? A. There are 2 different methods for trunking. D. http://www. PPP encapsulation with a virtual template Link Aggregation Protocol at the access layer dot1q VLAN trunking Inter-Switch Link Correct Answer: C Section: Layer 2 Technologies 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.com/ . Manually force trunking with switchport mode trunk on both switches. C. 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.dat and ensure that the switch with lowest MAC address is the VTP server. QUESTION 60 A network engineer must implement Ethernet links that are capable of transporting frames and IP traffic for different broadcast domains that are mutually isolated. Of these.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol. Delete vlan. C.

B.exam. Cisco Discovery Protocol version 1 and version 2 carry native VLAN information.asp?p=29803&seqNum=3 QUESTION 62 Refer to the exhibit. VLAN 2013 on the multilayer switch is configured as the native VLAN. A multilayer switch has been configured to send and receive encapsulated and tagged frames. you will see CDP error messages on the console output. spanning-tree bpdu-filter is enabled. but version 2 does not. Cisco Discovery Protocol version 1 carries native VLAN information.com/articles/article.ciscopress. C. http://www. Correct Answer: A Section: Layer 2 Technologies 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. B. Which option is the cause of the spanning-tree error? A. D. If you have a native VLAN mismatch. Reference: http://www. but versions 1 and 2 do not.com/ . Cisco Discovery Protocol version 3 carries native VLAN information.

but 1 (the default native VLAN) on the other switch. D. however.1Q trunks. The “vtp pruning” command prunes VLANs automatically. Native VLAN mismatches are detected via spanning tree and Cisco Discovery Protocol (CDP).1q trunks are on both sides.cisco.html QUESTION 64 Which action allows a network engineer to limit a default VLAN from being propagated across all trunks? A. both with native VLAN mismatch. D. VTP pruning access list switchport trunk allowed VLAN VLAN access-map Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Cisco advocates the benefits of pruning VLANs in order to reduce unnecessary frame flooding.C.com/library/content. 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/c/en/us/support/docs/switches/catalyst-6500-series-switches/24330-185. http://www. If you use 802.informit. which stops the inefficient flooding of frames where they are not needed. Reference: http://www. Reference: http://www. you must ensure that you choose a common native VLAN for each port in the trunk. VLAN ID 1 should not be used for management traffic because its unsafe. 802. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Here we see that the native VLAN has been configured as 2013 on one switch. C. Upgrade to VTP version 3 for advanced feature set support.aspx?b=CCNP_Studies_Switching&seqNum=25 QUESTION 63 A network engineer must improve bandwidth and resource utilization on the switches by stopping the inefficient flooding of frames on trunk ports where the frames are not needed.com/ . the trunk still remains up for other VLANs. spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on the trunk.exam. not via DTP messages. Which Cisco IOS feature can be used to achieve this task? A. If spanning tree detects a native VLAN mismatch. B.

Reference: http://www. 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: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The default system MTU for traffic on Catalyst switches is 1500 bytes. C.html QUESTION 66 Refer to the exhibit. http://www. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Manaully pruning the default VLAN (1) can only be done with the “switchport trunk allowed vlans remove” command.B.1q Q-in-Q encapsulation? A.com/en/US/docs/switches/lan/catalyst3550/software/release/12. Enable VTP pruning on the VTP server. 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.com/ . Use trunk pruning vlan 1. D.1_13_ea1/configuration/guide/swtunnel.1Q tunneling (Q-in-Q) feature increases the frame size by 4 bytes when the extra tag is added. D. The “trunk pruning vlan 1” option is not a valid command. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning. B. Because the 802. QUESTION 65 What is required for a LAN switch to support 802. Manually prune default VLAN with switchport trunk allowed vlans remove. C.cisco.exam.

B. The higher the number. C. The valid range is from 1 to 65535. LACP uses the port priority with the port number to form the port identifier. all VLAN packets are tagged on the trunk link. The port priority can be configured automatically or through the CLI. The default is 32768. except the native VLAN.exam. D. 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. Two bytes are used for the tag protocol identifier (TPID).How many bytes are added to each frame as a result of the configuration? A. Configure LACP port-priority on G0/1 to 65535. http://www. QUESTION 67 A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1. G0/3. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: A LACP port priority is configured on each port using LACP.1Q trunking. C. the other two bytes for tag control information (TCI). Configure G0/1 as half duplex and G0/2 as full duplex.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: Layer 2 Technologies Explanation Explanation/Reference: Explanation: In 802. and G0/4 between two switches using Ethernet port-channel. the lower the priority. A VLAN tag adds 4 bytes to the frame. Configure LACP port-priority on G0/1 to 1. LACP traffic goes through G0/4 because it is the highest interface ID. G0/2. B. Which action allows interface G0/1 to always actively forward traffic in the port-channel? A. D.

Only the combinations auto-desirable. Only the combinations active-active. auto. If a device on one side of the channel does not support PagP. PagP modes are active. PagP modes are off. 4.Reference: http://www. desirable-desirable. B. the device on the other side must have PagP set to on.exam.cisco. PagP modes are active. such as a router. it is not initiated. The PagP modes are explained below. however. off: PagP will not run. 1. desirable. desirable-desirable. desirable. http://www. The formation of a channel is desired and initiated.com/c/en/us/td/docs/ios/12_2sb/feature/guide/gigeth. desirable-desirable. PagP modes are off. desirable. Reference: http://www. The channel is forced to remain down. 3. desirable-desirable. and on. auto. on: PagP will not run. desirable: PagP is running actively. D.com/ . and on-on will allow a channel to be formed. active. and on-on allow the formation of a channel. and on-on will allow a channel to be formed. and on. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PagP modes are off. C. and on-on allow the formation of a channel. Only the combinations auto-desirable. The formation of a channel is desired.com/c/en/us/support/docs/switches/catalyst-2900-xl-series-switches/21041-131.html QUESTION 69 Refer to the exhibit. and on-on allow the formation of a channel. and on. Only the combinations auto-auto. desirable. The channel is forced to come up. desirable-desirable. and on.html#wp1081491 QUESTION 68 Which statement about the use of PagP link aggregation on a Cisco switch that is running Cisco IOS Software is true? A. desirable. and on-on allow the formation of a channel. Only the combinations active-desirable.cisco. desirable-desirable. auto: PagP is running passively. Only the combinations of auto-desirable. and on. 2.

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

which is only a PAgP mode. desirable. . Active: We can form an aggregate link and initiate the negotiation. This is similar to the off state for PAgP. Only the combinations auto-desirable. the switch neither sends the LACP packet nor processes any inbound LACP packet. and on. This is similar to the auto mode in PAgP. Users of PC-1 experience slow connection when a webpage is requested from the server. 4. The channel is forced to come up. To increase bandwidth. it is not initiated. The link aggregate is formed if the other end runs in LACP active or passive mode. The formation of a channel is desired and initiated. The formation of a channel is desired. This is similar to the desirable mode of PAgP. Link Aggregation Control Protocol Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PAgP modes are off. the network engineer configured an EtherChannel on interfaces Fa1/0 and Fa0/1 of the server farm switch.D. The peer (in active state) initiates negotiation (when it sends out an LACP packet) which we receive and answer. on: PAgP will not run. Off: The link aggregation is not formed. fa0/14. 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 . and on-on will allow a channel to be formed. Passive: The switch does not initiate the channel but does understand inbound LACP packets. 1. This is similar to the on state for PAgP. The channel is forced to remain down.exam.In other words. 3. eventually to form the aggregation channel with the peer. however.com/ . off: PAgP will not run. auto: PAgP is running passively. We do not send or understand the LACP packet. desirable: PAgP is running actively. which is operating in desirable mode. and fa0/15 are all in Port Channel 12. QUESTION 70 Refer to the exhibit. In this example. we see that fa 0/13. desirable-desirable. as shown here: Server_Switch#sh etherchannel load-balance http://www. auto. 2.

PAgP packets are sent between EtherChannel-capable ports in order to negotiate the formation of a channel. Which action can the engineer take to resolve this issue? A.EtherChannel Load-Balancing Operational State (src-mac): Non-IP: Source MAC address IPv4: Source MAC address IPv6: Source IP address Server_Switch# HoweIer. PAgP does not change the port speed and duplex for all ports in the bundle until the switch is rebooted. The restrictions are: http://www. Upgrade the switch IOS to IP services image. PAgP changes the port speed and duplex for all ports in the bundle. Change the load-balance method to dst-mac. D. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PAgP aids in the automatic creation of EtherChannel links. PAgP changes the port speed but not the duplex for all ports in the bundle. The load balancing method should be changed to destination MAC. Some restrictions are deliberately introduced into PAgP. D. B. C. PAgP drops the ports that do not match the configuration. traffic is still slow. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Since this traffic is coming from PC-1. B. QUESTION 71 A network engineer changed the port speed and duplex setting of an existing EtherChannel bundle that uses the PAgP protocol. the source MAC address will always be that of PC-1. Contact Cisco TAC to report a bug on the switch. since the web server has two NICs traffic will be load balanced across both MAC addresses. Which statement describes what happens to all ports in the bundle? A. C.com/ . and since the load balancing method is source MAC. traffic will only be using one of the port channel links. Disable EtherChannel load balancing.exam.

and on-on allow the formation of a channel. •PAgP modes are off. All interfaces in each EtherChannel must be the same speed.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. all ports in the bundle are modified to match that VLAN. D.com/ . A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel.html QUESTION 73 Refer to the exhibit. desirable. 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. Reference: http://www. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel.cisco. http://www. and on. desirable-desirable. auto. Reference: http://www. If speed and duplex change when a bundle exists. Only the combinations auto-desirable. PAgP requires that all ports in the channel belong to the same VLAN or are configured as trunk ports. C. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 16 Gbps only for Gigabit EtherChannel. such as a router.•PAgP does not form a bundle on ports that are configured for dynamic VLANs. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: An EtherChannel consists of individual Fast Ethernet or Gigabit Ethernet links bundled into a single logical link.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4.cisco. The device on the other side must have PAgP set to on if a device on one side of the channel does not support PAgP. •PAgP does not group ports that operate at different speeds or port duplex. PAgP changes the port speed and duplex for all ports in the bundle. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. and all must be configured as either Layer 2 or Layer 3 interfaces.html QUESTION 72 Which statement about using EtherChannel on Cisco IOS switches is true? A. B.exam. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 10 Gbps only for Gigabit EtherChannel. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. When a bundle already exists and a VLAN of a port is modified. Each EtherChannel can consist of up to eight compatibly configured Ethernet interfaces.

Fa0/14.Which statement about switch S1 is true? A. C. Correct Answer: A Section: Layer 2 Technologies Explanation http://www. D. B. Fa0/14.exam. Fa0/14. and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol. and Fa0/15 successfully formed a Layer 3 port-channel interface using a Cisco proprietary protocol. Fa0/14. Physical port Fa0/13. Physical port Fa0/13. and Fa0/15 successfully formed a Layer 2 physical port-channel interface using a Cisco proprietary protocol. Logical port Fa0/13.com/ . Logical port Fa0/13. and Fa0/15 successfully formed a Layer 3 physical port-channel interface using an open standard protocol.

it responds with a 802. The protocol used for this port channel shows as LACP.1d understands RSTP BPDUs because they are the same version.1d BPDU. but when a RSTP switch receives a 802.1d to communicate. While this timer is active. if the RSTP switch is using 802. 1 2 3 4 http://www. it responds with an 802.exam.1d to communicate. and RSTP BPDUs are sent.1d BPDU and eventually the two switches run 802.1D switches.1d does not understand RSTP BPDUs because they are different versions. D. B.1d BPDU. 802. However. QUESTION 74 What happens on a Cisco switch that runs Cisco IOS when an RSTP-configured switch receives 802.html QUESTION 75 When two MST instances (MST 1 and MST 2) are created on a switch. it assumes that it is connected to an 802. 802. RSTP selectively sends 802. it does not respond with a 802. the migrate-delay timer is started (specifies the minimum time during which RSTP BPDUs are sent).com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/spantree.1d BPDU. it restarts the timer and starts using RSTP BPDUs on that port. C. When a port is initialized. the switch processes all BPDUs received on that port and ignores the protocol type.1d BPDU and eventually the two switches run 802. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: For backward compatibility with 802.com/ .1d BPDU. C. it does not respond with a 802. as opposed to PagP. and the (SU) means they are in use and operating at layer 2.1d understands RSTP BPDUs because they are the same version.Explanation/Reference: Explanation: These three ports show that they are in Port Channel 1.1D BPDUs. B. If the switch receives an 802. 802. which is a standards based protocol. which is Cisco proprietary. 802.1D configuration BPDUs and TCN BPDUs on a per-port basis.cisco. what is the total number of spanning-tree instances running on the switch? A.1d BPDU.1d to communicate. but when a RSTP switch receives a 802. D.1d BPDU? A. but when a RSTP switch receives a 802. but when a RSTP switch receives an 802.1d does not understand RSTP BPDUs because they are different versions.1D BPDU after the port migration-delay timer has expired.1d BPDU and eventually the two switches run 802.1D switch and starts using only 802.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired. Reference: http://www.

CIST. there will be the 2 defined MST instances. in which all the spanning tree instances are independent. Reference: http://www. the number of BPDUs that need to be processed to support multiple spanning tree instances is 68sernamcantly reduced. MST establishes and maintains IST. By default. and CST spanning trees: An IST is the spanning tree that runs in an MST region.cisco. even if regions A and B are interconnected.com/ . The IST is the only spanning tree instance that sends and receives BPDUs. but each MST instance has its own topology parameters. All other MST instances are numbered from 1 to 4094. for example. The CST interconnects the MST regions and single spanning trees. Because the MST BPDU carries information for all instances. for a total of 3 instances. MST maintains multiple spanning tree instances. MST instance 1 in region A is independent of MST instance 1 in region B.Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Unlike other spanning tree protocols. all VLANs are assigned to the IST. An MST instance is local to the region. All of the other spanning tree instance information is contained in MSTP records (Mrecords). and the special 0 instance. In the case for this question. and so forth.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/spantree. such as root bridge ID.html QUESTION 76 Refer to the exhibit.exam. A CIST is a collection of the ISTs in each MST region. root path cost. known as the IST. which are 68sername6868eed within MST BPDUs. http://www. All MST instances within the same region share the same protocol timers. Within each MST region. Instance 0 is a special instance for a region.

C. Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0. D. B. Which action is needed to modify the Layer 2 spanning-tree network so that traffic for PC1 VLAN from switch SW3 uses switchport f1/1 as a primary port? A. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: http://www.f1/0 and f1/1 have the same end-to-end path cost to the designated bridge.com/ . Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16.exam. Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0.

Explanation: If a loop occurs.1_9_ea1/configuration/guide/swstp. Why would the switch be considered as a root bridge? A. http://www. STP considers port priority when selecting a LAN port to put into the forwarding state. A lower path cost represents higher-speed transmission and is preferred. 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.exam. The possible priority range is 0 through 240 (default 128). If all LAN ports have the same priority value.html#wp1105354 QUESTION 77 Refer to the exhibit. configurable in increments of 16. Reference: http://www.com/ . STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports.cisco. The bridge priority is 1 and all ports are forwarding.com/en/US/docs/switches/lan/catalyst2950/software/release/12.

html#wp1020666 QUESTION 78 Refer to the exhibit. Considering the default cost of upstream bridges to the root bridge is equal. it has the lowest priority value for VLAN 1. C. The bridge priority is 128.19 and all ports are forwarding. D. which option will be the new root port for VLAN 10? A.exam. the range is 0 to 61440 in increments of 4096. All ports are members of VLAN 10. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: For priority.com/en/US/docs/switches/lan/catalyst2950/software/release/12. interface f0/13 http://www. the default is 32768.1_9_ea1/configuration/guide/swstp.cisco. The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”. The lower the number. Reference: http://www.B. The switch priority value is zero. the more likely the switch will be chosen as the root switch.com/ .

Reference: https://community. interface f0/15 D. 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.com/extreme/topics/802_1d_spanning_tree_election_rules QUESTION 79 A network engineer is trying to deploy a PC on a network. B. D. Total Path Cost to root . each port goes through 4 states to ensure that there are no physical loops in the layer 2 broadcast domain. http://www.lowest prevails (local Root Port cost added upon receipt of Configuration – PDUs on that port.lowest prevails Connected Port ID (Port Priority + Port#) .Blocking – A port that would cause a switching loop. from the direction of Root Bridge) Connected Bridge ID .lowest prevails In this case.lowest prevail– Local Port ID . 71sername71e f0/21 Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Root Port election on each bridge Each (non-Root) bridge has exactly one Root Port. The engineer observes that when the PC is connected to the network. BPDU data is still received in blocking state. C. so it will be the root port. interface f0/14 C. Configure port to duplex full and speed 1000. fa0/21 has the lowest cost.B. Configure spanning-tree portfast. 1. With the initial version of spanning tree.Listening – The switch processes BPDUs and awaits possible new information that would cause it to return to the blocking state. Configure no switchport. 2. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: When first powered on. These steps are outlined as follows. no user data is sent or received but it may go into forwarding mode if the other links in use were to fail and the spanning tree algorithm determines the port may transition to the forwarding state. this process could take from 30-60 seconds.extremenetworks. Configure port duplex and speed to auto negotiation.com/ . which represents the best path to the Root Bridge.exam.

Correct Answer: D Section: Layer 2 Technologies http://www. and forwarding states. bypassing the listening and learning states. The port goes into BPDU-inconsistent state and stops forwarding traffic. learning. STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately. B. the “Spanning-tree portfast bpdufilter default” command specifies that if a BPDU is received on that port. However. then the default action of STP of listening. Reference: http://net. If an interface is enabled for portfast receives BDPU. learning. and forwarding states. and forwarding states should be used. C. bypassing the listening and learning states. C. If an interface is enabled for portfast receives BDPU. D. D. The port goes into errdisabled state and stops forwarding traffic. the port is shut down immediately. The port goes into loop-inconsistent state and stops forwarding traffic.us/Home/ethernet-and-ip/spanning-tree-protocol QUESTION 80 A network engineer configured an Ethernet switch using these commands. The port goes into root-inconsistent state and stops forwarding traffic.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.cmed. Switchone(config) # Spanning-tree portfast bpdufilter default Which statement about the spanning-tree portfast feature on the switch is true? A.exam. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately. the port goes into the spanning-tree inconsistent state. the port goes through the spanning-tree listening. B. STP still monitors incoming BPDUs that would indicate it should return to the blocking state to prevent a loop. normal operation. QUESTION 81 Which statement describes what happens when a port configured with root guard receives a superior BPDU? A.com/ . If an interface is enabled for portfast receives BDPU. If an interface is enabled for portfast receives BDPU. learning. the port does not go through the spanning-tree listening.

com/en/US/docs/switches/lan/catalyst6500/ios/12. Normally. Converting a port channel to mLACP can cause a service disruption.exam.html QUESTION 83 What is the maximum number of 10 Gigabit Ethernet connections that can be utilized in an EtherChannel for the virtual switch link? A.com/ . unless two or more ports of the root bridge are connected together. mLACP does not support half-duplex links. No more than 100 VLANs can be active on a switch configured as a PoA.shtml QUESTION 82 Which statement about restrictions for multichassis LACP is true? A. If the bridge receives superior STP Bridge Protocol Data Units (BPDUs) on a root guard-enabled port. The DHD system priority must be lower (higher numerically) than the PoA system priority. In this way. Converting a port channel to mLACP can cause a service disruption. C. This root-inconsistent state is effectively equal to a listening state. root guard moves this port to a root-inconsistent STP state.Explanation Explanation/Reference: Explanation: The root guard ensures that the port on which root guard is enabled is the designated port.cisco. VSS mode does not support the mLACP for server access feature.cisco. mLACP does not support multiple neighbors. root bridge ports are all designated ports.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b. follow these guidelines and restrictions: PFC3A mode does not support the mLACP for server access feature. 4 http://www. It does not support 1Gb links. It is available only on a Cisco Catalyst 6500 Series chassis. Reference: http://www. D.2SX/configuration/guide/mlacp_server_support. B. No traffic is forIarded across this port. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: When configuring mLACP for Server Access. It is not available in VSS. the root guard enforces the position of the root bridge. Reference: http://www.

Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Q. The VSS transitions to the dual active recovery mode. the VSS will transition to the dual active recovery mode. 6 C. 8 D. If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up. The virtual switch members reload.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b.B. 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.2(33)SXI) http://www.html QUESTION 84 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A. and only the new active virtual switch continues to forward traffic.exam. Both virtual switch members cease to forward traffic. B. D. What happens if all VSL connections between the virtual switch members are lost? A. C.cisco. The VSS transitions to the dual active recovery mode. 12 Correct Answer: C Section: Layer 2 Technologies 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.com/ . 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. Reference: http://www. and both virtual switch members continue to forward traffic independently.

12. The new active virtual switch continues to forward traffic on all links. SwitchB has a minimal configuration. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. SwitchA is currently configured correctly. All interfaces are shut down in the formerly active virtual switch member.In the dual active recovery mode. Configuration Requirements for SwitchB • Vlan 21 Name: Marketing will support two servers attached to fa0/9 and fa0/10 • Vlan 22 http://www. 22 and 23. You have been tasked with competing the needed configuring of SwitchA and SwitchB. D.com/ . C. The switch shuts down and waits for the VSL link to be restored before sending traffic. Reference: http://www. They have just added a new switch (SwitchB) to the existing network as shown in the topology diagram. • SwitchA needs to be the root switch for vlans 11.cisco. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops. Configuration Requirements for SwitchA The VTP and STP configuration modes on SwitchA should not be modified. B.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b. All other vlans should be left are their default values. Reference: http://www.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b. 13. SwitchA and SwitchB use Cisco as the enable password.html QUESTION 86 SIMULATION Scenario: You work for SWITCH. but the new active virtual switch forwards traffic on all links. RouterA is currently configured correctly and is providing the routing function for devices on SwitchA and SwitchB.cisco. The VSS detects which system was last in active state and shuts down the other switch. 21.com. The new active virtual switch continues to forward traffic on all links.exam. but will need to be modified to support the addition of SwitchB.html QUESTION 85 Which statement describes what happens when a switch enters dual active recovery mode? A. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: In the dual active recovery mode. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member.

22 and 23 should tagged when traversing the trunk link.Name: Sales will support two servers attached to fa0/13 and fa0/14 • Vlan 23 o Name: Engineering 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. with SwitchA controlling activation.168. • Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link.com/ . • 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. 21. • 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.exam. • SwitchB VTP mode needs to be the same as SwitchA. This mode should be done with a non-proprietary protocol.1. http://www.

com/ .exam.Correct Answer: Here are steps Section: Layer 2 Technologies Explanation Explanation/Reference: hostname SWITCH_B ! ! vlan 21 name Marketing vlan 22 name Sales vlan 23 http://www.

21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.com/ .name Engineering ! ! interface FastEthernet0/3 switchport trunk allowed vlan 1.exam.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 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 http://www.

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 ! interface FastEthernet0/3 switchport trunk allowed vlan 1.255.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 1.21-23 ! interface Vlan1 ip address 192.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.11 255.exam.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/21 switchport access vlan 21 http://www.1.168.255.com/ .

168.1 ! ! End QUESTION 87 SIMULATION You have been tasked with configuring multilayer SwitchC. You do not have access to RouteC. Company policies forbid the use of static or default routing. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links. which has a partial configuration and has been attached to RouterC as shown in the topology diagram. http://www.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. No trunking has been configured on RouterC.com/ .1. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1. All routes must be learned via EIGRP 65010 routing protocol. Also SwitchC needs to be able to ping server S1.exam. RouterC is correctly configured.

Routed interfaces should use the lowest host on a subnet when possible. Routing must only be enabled for the specific subnets shown in the diagram.0/24 – 190.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway. changes VLAN port assignments or create trunks.exam. Company policies forbid the use of static or default routing. All routes must be learned via the EIGRP routing protocol.200. SwitchC uses Cisco as the enable password.32/27 – 190.10.com/ .250.200.10. The following subnets are available to implement this solution: – 10. http://www. Note: Due to administrative restrictions and requirements you should not add or delete VLANs.250.

com/ .http://www.exam.

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Trunking must be established between RouterC and SwitchC.com/ . No trunking requires. C:\>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190.Correct Answer: There are two ways to configure interVLAN routing in this case Section: Layer 2 Technologies Explanation Explanation/Reference: + Use RouterC as a “router on a stick” and SwitchC as a pure Layer2 switch. Click on H1 and H2 and type the “ipconfig” command to get their default gateways. We should check the default gateways on H1 & H2. + Only use SwitchC for interVLAN routing without using RouterC.200.33 Host2: http://www.exam. SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router).250. The question clearly states “No trunking has been configured on RouterC” so RouterC does not contribute to interVLAN routing of hosts H1 & H2 -> SwitchC must be configured as a Layer 3 switch with SVIs for interVLAN routing.

250.0 ->RouterC has used IP 10.0. also don’t modify/delete any port just do the above configuration.65 255.0.0 0.com/ .33 255.200.65 Now we have enough information to configure SwitchC (notice the EIGRP AS in this case is 650) Note: VLAN2 and VLAN3 were created and gi0/10.10. But in the exam the sim is just a flash based simulator so we should use two above commands.200.0.250. If you use wrong AS number.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED.255 SwitchC(config-router)# network 190. just for sure.255.255.0. In order to complete the lab.0.0.250.255. we are pretty sure instead of using two commands “network 190.250. Also some reports said the “no auto-summary” command can’t be used in the simulator. But after finishing the configuration.200. no neighbor relationship is formed between RouterC and SwitchC.2 255. QUESTION 88 You have been asked to install and configure a new switch in a customer network.200.10. so you will not miss within it in the exam. the simulator does not let you assign IP address on Gi0/1 interface.10.0/16 is not used anywhere else in this topology.0 is shown.200. http://www. and from the PCs as well. you should expect the ping to SERVER to succeed from the MLS.0. even without “no auto-summary” command the network still works correctly.200.10.224 SwitchC(config-if)# no shutdown SwitchC(config-if)#exit SwitchC(config)# ip routing (Notice: MLS will not work without this command) SwitchC(config)# router eigrp 65010 SwitchC(config-router)# network 10.1 so this is the lowest usable IP address.200.0.32 0. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.250. in fact it is not necessary because the network 190.exam.31″ and “network 190. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.200.255.0. In fact. we can use “show run” command to verify.0. gi0/11 interfaces were configured as access ports so we don’t need to configure them in this sim.0.0″ because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised.10.0.0.250.64 0.250.255.10.31″ we can use one simple command “network 190.255. SwitchC(config-if)# ip address 10.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190.31 SwitchC(config-router)# network 190.+ Default gateway: 190. only the summarized network 190.32 0.64 0.200. 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.200. Use the console access to the existing and new switches to configure and verify correct device configuration.

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

http://www.exam.com/ .

Logging in to SW1 and using the “show vtp status” command we see this: http://www. So. D. C. Option A Option B Option C Option D Option E Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Within any VTP.com/ . the VTP domain name must match. B. step one is to find the correct VTP name on the other switches.A. E.exam.

This leaves only choice D and E. Note that the VTP versions supported in this network are 1. Use the console access to the existing and new switches to configure and verify correct device configuration. so we know that this port must be an access port in VLAN 100. 2. QUESTION 89 You have been asked to install and configure a new switch in a customer network. http://www. We also see from the topology diagram that eth 0/0 of the new switch connects to a PC in VLNA 100. 3 so either VTP version 2 or 3 can be configured on the new switch. leaving only choice D as correct.So we know that the VTP domain must be CCNP.exam.com/ .

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D. G.exam. VLAN1 VLAN 99 VLAN 999 VLAN 40 VLAN 50 VLAN 200 VLAN 300 Correct Answer: B Section: Layer 2 Technologies Explanation http://www. E. B. C. For which configured VLAN are untagged frames sent over trunk between SW1 and SW2? A.com/ .Refer to the configuration. F.

Explanation/Reference: Explanation: The native VLAN is used for untagged frames sent along a trunk. Use the console access to the existing and new switches to configure and verify correct device configuration. http://www. By issuing the “show interface trunk” command on SW1 and SW2 we see the native VLAN is 99.exam. QUESTION 90 You have been asked to install and configure a new switch in a customer network.com/ .

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E. configure back to vtp server mode. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: http://www. Which configuration step is valid? A. D. B.SW2 and SW4 On SW2. C. configure vtp mode as off and configure VLAN 500 and VLAN 600.exam. 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 . 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.You are adding new VLANs.com/ .

com/ . so we will need to add both VLANs to SW1 and SW2. http://www. SW2. but SW4 is a client.exam.Explanation: By issuing the “show vtp status command on SW2. and SW4 we see that both SW1 and SW2 are operating in VTP server mode.

com/ .exam.http://www.

com/ . Use the console access to the existing and new switches to configure and verify correct device configuration. http://www.exam.QUESTION 91 You have been asked to install and configure a new switch in a customer network.

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You are required to configure private VLANs for a new server deployment connecting to the SW4 switch. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: 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.exam. Which of the following configuration steps will allow creating private VLANs? A.Examine the VTP configuration. C. B. SW4 and New_Switch Disable VTP pruning on New_Switch and SW4 only. D. E.com/ .

D.2SX/configuration/guide/snoodhcp. Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting. By default. E. accounting http://www.html#wp1090479 QUESTION 93 Which portion of AAA looks at what a user has access to? A. DHCP snooping is inactive on all VLANs. Ensure that DHCP server is connected through a trusted interface.com/en/US/docs/switches/lan/catalyst6500/ios/12. the trust state of all interfaces is untrusted. The feature is not active until you complete this step. QUESTION 92 A Cisco Catalyst switch that is prone to reboots continues to rebuild the DHCP snooping database.cisco.com/ . Disable Option 82 for DHCP data insertion. A DHCP snooping database agent should be configured. Enable DHCP snooping for all VLANs that are associated with the switch. you will need to only disable pruning on the switch that contains the private VLANs. Reference: http://www. By default. 2. Apply ip dhcp snooping trust on all interfaces with dynamic addresses. Enable DHCP snooping on at least one VLAN. only SW4 will connect to servers in a private VLAN. Configure the DHCP snooping database agent. What is the solution to avoid the snooping database from being rebuilt after every device reboot? A. B. authorization B. Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Minimum DHCP Snooping Configuration The minimum configuration steps for the DHCP snooping feature are as follows: 1. authentication C.exam. In this case. 3. 5. This step ensures that database entries are restored after a restart or switchover. Enable DHCP snooping globally. Define and configure the DHCP server. 4.Explanation: To create private VLANs. C.

Authorization: After initial authentication. Accounting: The last "A" is for accounting. you could get a log of when users logged in and when they logged out. C. with accounting.com/blog/data-center/what-is-aaa-and-how-do-you-configure-it-in-the-cisco-ios/ QUESTION 94 Which command creates a login authentication method named “login” that will primarily use RADIUS and fail over to the local user database? A. the network team is considering enabling dynamic ARP inspection alongside DHCP snooping. (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: Infrastructure Security Explanation Explanation/Reference: Explanation: In the command “aaa authentication login login radius local” the second login is the name of the AAA method. QUESTION 95 A server with a statically assigned IP address is attached to a switch that is provisioned for DHCP snooping. authorization looks at what that authenticated user has access to do. it can also support encryption. For example. In the Cisco IOS. You can use accounting to see what users do once they are authenticated and authorized. B. which would be specific to the individual user rights. you can define AAA authorization with a named list or authorization method. auditing Correct Answer: A Section: Infrastructure Security 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. D. Reference: http://www.com/ .exam.D.techrepublic. It also lists radius first then local. 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 http://www. and reporting. For more protection against malicious attacks. Depending on your security options. auditing. It provides a way“o” collecting security information that you can use for billing. RADIUS or TACACS+ security servers perform authorization for specific privileges by defining attribute-value (AV) pairs.

configure a static DHCP snooping binding entry on the switch.com/ .the future? A. Configure VTP Transparent Mode.cisco. B. Verify the source MAC address of all untrusted interfaces with ip dhcp snooping verify mac-address command. Ensure all switches are configured as VTP server mode. logs. Disable VTP and manually assign VLANs. the switch forwards the packet without any checks. the switch forwards the packet only if it is valid. D. On untrusted interfaces. Enable VTP version 3. B. To ensure network reachability to the server. 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/td/docs/switches/lan/catalyst3750/software/release/12-2_55_se/configuration/guide/scg3750/swdynarp. This capability protects the network from certain man-in-the-middle attacks. Which configuration must be made before the private VLAN is configured? A. Dynamic ARP inspection ensures that only valid ARP requests and responses are relayed. 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. Correct Answer: C Section: Infrastructure Security Explanation http://www. Configure a static DHCP snooping binding entry on the switch. Disable DHCP snooping information option. It intercepts. 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. and discards ARP packets with invalid IP-to-MAC address bindings. C. Reference: http://www.html QUESTION 96 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN. Trust the interface that is connected to the server with the ip dhcp snooping trust command. the DHCP snooping binding database. D. C.exam. Correct Answer: B Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Dynamic ARP inspection is a security feature that validates ARP packets in a network.

However. or with source IP and MAC address filtering. You can configure IP source guard with source IP address filtering. An entry in this table has an IP address.com/ . If there is no match.com/articles/article. the packets are assumed to be spoofed and will be discarded. The DHCP client interfaces have storm control configured.asp?p=29803&seqNum=6 QUESTION 97 DHCP snooping and IP Source Guard have been configured on a switch that connects to several client workstations. When IP source guard is enabled with this option. IP Source Guard with the ip verify source port-security command is configured under the interfaces that connect to all DHCP clients on the switch. Static DHCP bindings are not configured on the switch. C. and its associated VLAN number. The interface that is connected to the workstation in question will be put into the errdisabled state.ciscopress. Reference: http://www. B.exam. IP traffic is filtered based on the source IP and MAC addresses. When IP source guard is enabled with this option. Private VLANs also carry TLVs that are not known to all types of Cisco switches. 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. http://www. The IP address of one of the workstations does not match any entries found in the DHCP binding database. C. The packets originating from the workstation are assumed to be spoofed and will be discarded. B.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/72846-layer2-secftrs-catl3fixed. The switch uses the IP source binding table only wIen IP source guard is enabled. Which option is the cause of this issue? A. D.Explanation/Reference: Explanation: You must configure VTP to transparent mode before you can create a private VLAN. Traffic will pass accordingly after the new IP address is populated into the binding database. The DHCP server does not support information option 82. Packets from the workstation will be rate limited according to the default values set on the switch.cisco. clients are not receiving an IP address via the DHCP server.html#ipsourceguard QUESTION 98 A DHCP configured router is connected directly to a switch that has been provisioned with DHCP snooping. its associated MAC address. Reference: http://www. The switch forwards traffic only when the source IP and MAC addresses match an entry in the IP source binding table. Private VLANs are configured in the context of a single switch and cannot have members on other switches. IP traffic is filtered based on the source IP address. Correct Answer: D Section: Infrastructure Security 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). Which statement describes the outcome of this scenario? A.

The configured SVIs on the switch have been removed for the associated interfaces. The MAC address in the DHCP packet is not learned as a secure address. Reference: http://www. even if they are not utilized for dynamic address allocation. An entry in this table has an IP http://www. D. there are two caveats: The DHCP server must support option 82. but is unable to configure ip verify source under several of the interfaces. the switch blocks all IP traffic received on the interface.exam. No VLANs exist on the switch and/or the switch is configured in VTP transparent mode. or the client is not assigned an IP address. After IP source guard is enabled on an interface. You can use IP source guard to prevent traffic attacks caused when a host tries to use the IP address of its neighbor. The switch is configured for sdm prefer routing as the switched database management template. DHCP snooping must be enabled on all VLANs. The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). Correct Answer: B Section: Infrastructure Security Explanation Explanation/Reference: Explanation: IP source guard is a security feature that restricts IP traffic on nonrouted. The local DHCP server is disabled prior to enabling IP Source Guard. B. Layer 2 interfaces by filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings.cisco. A network engineer is configuring the switch for DHCP snooping and IP Source Guard.html#wp1069615 QUESTION 99 A switch is added into the production network to increase port capacity. A port access control list (ACL) is applied to the interface. You can enable IP source guard when DHCP snooping is enabled on an untrusted interface. except for DHCP packets allowed by DHCP snooping. Which option is the cause of the problem? A. C. The MAC address of the DHCP client is learned as a secure address only when the switch receives non-DHCP data traffic. E. Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: When you enable both IP Source Guard and Port Security. The port ACL allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic.com/ . The interfaces are configured as Layer 3 using the no switchport command. using the ip verify source port-security interface configuration command.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-2_25_see/configuration/guide/3550SCG/ swdhcp82.D.

Only broadcast traffic is limited by this particular storm control configuration.) A. IP source guard is supported only on Layer 2 ports. and its associated VLAN number.com/ . In which three ways does this command impact the traffic? (Choose three. Reference: http://www.cisco. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. its associated MAC address. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth. F. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. B.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-2_25_see/configuration/guide/3550SCG/ swdhcp82. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth. You can configure IP source guard with source IP address filtering or with source IP and MAC address filtering.html#wp1069615 QUESTION 100 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server. including access and trunk ports. Correct Answer: CDF Section: Infrastructure Security Explanation Explanation/Reference: Explanation: http://www. E.address.exam. The switch uses the IP source binding table only when IP source guard is enabled. The switch drops broadcasts when they reach 75% of bandwidth. C. D.

you can bring it out of this state automatically by configuring the errdisable recovery cause psecure-violation global http://www.cisco. the network team has been overwhelmed with port reset requests. the broadcast keyword was used so only broadcast traffic is limited. Reference: http://www.com/ .In this case.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-2_25_see/configuration/guide/3550SCG/swtrafc. C. They decide to configure the network to automate the process of re-enabling user ports.exam. B.html QUESTION 101 After port security is deployed throughout an enterprise campus. Which command accomplishes this task? A. E. D. 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: Infrastructure Security Explanation Explanation/Reference: Explanation: When a secure port is in the error-disabled state.

E.7b00. 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.exam.) A. If a port is in per-VLAN errdisable mode. This is the default mode.e289 Dynamic 1 FastEthernet0/1 0010.-------------------0010.pdf QUESTION 102 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/53SG/configuration/config/port_sec. D.---. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port.1545 Dynamic 2 FastEthernet0/5 QUESTION 103 While troubleshooting a network outage. Reference: http://www. 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: Infrastructure Security Explanation Explanation/Reference: Explanation: These two commands will show the MAC address table.com/ .-----------. Which option decreases consumption of bandwidth used by broadcast traffic? http://www. Here is an example output: Switch> show mac-address-table Dynamic Addresses Count: 9 Secure Addresses (User-defined) Count: 0 Static Addresses (User-defined) Count: 0 System Self Addresses Count: 41 Total MAC addresses: 50 Non-static Address Table: Destination Address Address Type VLAN Destination Port ------------------. C. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces. including the switch port that the particular host is using. B.configuration command or you can manually reenable it by entering the shutdown and no shut down interface configuration commands.cisco.1540 Dynamic 2 FastEthernet0/5 0010.0de0. Which two commands help trace this PC when the MAC address is known? (Choose two.7b00.

Reference: http://www. D. or users issuing a denial-of-service attack can cause a storm. A LAN storm occurs when packets flood the LAN. Storm control uses rising and falling thresholds to block and then restore the forwarding of broadcast. multicast.com/ . Errors in the protocol-stack implementation. Storm control is configured for the switch as a whole but operates on a per-port basis.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12-1_22ea/SCG/scg/swtrafc. D. B. creating excessive traffic and degrading network performance. http://www. You can also set the switch to shut down the port when the rising threshold is reached. mistakes in network configuration.A. C.html QUESTION 104 Which command globally enables AAA on a device? A. or multicast packets. AAA features are not available for use until you enable AAA globally by issuing the aaa new-model command. B. storm control is disabled.exam. enable AAA by using the aaa new-model global configuration command. or unicast storm on a port. aaa new-model aaa authentication aaa authorization aaa accounting Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: To configure AAA authentication.cisco. By default. unicast. storm control SDM routing Cisco IOS parser integrated routing and bridging Dynamic ARP Inspection Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Storm control prevents traffic on a LAN from being disrupted by a broadcast. C. E.

cisco. if that method fails to respond. Method lists are specific to the authorization type requested: Auth-proxy — Applies specific security policies on a per-user basis. SLIP.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen. you are defining a particular list of authorization methods for the indicated authorization type. When you create a named method list. This can include a PPP. or ARAP connection. D.1x? A. RADIUS with EAP Extension TACACS+ RADIUS with CoA RADIUS using VSA http://www.com/ . D.Reference: http://www. For detailed information on the authentication proxy feature. Cisco IOS software uses the first method listed to authorize users for specific network services. C. B. network IP mobile EXEC auth-proxy Correct Answer: A Section: Infrastructure Security 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. including global configuration commands. C. associated with a specific privilege level. A method list is simply a named list describing the authorization methods to be queried (such as RADIUS or TACACS+). This process continues until there is successful communication with a listed authorization method. B.exam. Reference: http://www. Network — Applies to network connections. Command authorization attempts authorization for all EXEC mode commands. in sequence. or all methods defined are exhausted. Method lists enable you to designate one or more security protocols to be used for authorization.html QUESTION 105 Which AAA Authorization type includes PPP. EXEC — Applies to the attributes associated with a user EXEC terminal session.html QUESTION 106 Which authentication service is needed to configure 802. SLIP. and ARAP connections? A. refer to the chapter "Configuring Authentication Proxy" in the "Traffic Filtering“and Firewalls" part of this book” Comma“ds — Applies to the EXEC mode com”ands a user issues. the Cisco IOS software selects the next method listed in the method list. Reverse Access — Applies to reverse Telnet sessions.cisco. thus ensuring a backup system in case the initial method fails.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathor.

com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/12-1_19_ea1/configuration/guide/2940scg_1/sw8021x. none required 115sernamee cisco with password cisco no username with password linepass login authentication default http://www. the authentication service is transparent to the client. B. Because the switch acts as the proxy. Which login credentials are required when connecting to the console port in this output? A.cisco. Reference: http://www.exam. D. the authentication server — performs the actual authentication of the client.Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: With 802.1x.pdf QUESTION 107 Refer to the exhibit. C. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server.com/ . 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.

which lists none as the authentication method. local username. D.com/ . None means no authentication. C. RADIUS server. QUESTION 108 Refer to the exhibit. When a network administrator is attempting an SSH connection to the device. B.exam. RADIUS server Line password. meaning that credentials are not required and all sessions are allowed access immediately.Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Here the console has been configured with the NO_AUTH name. local username. RADIUS server. in which order does the device check the login credentials? A. local username Correct Answer: A Section: Infrastructure Security Explanation http://www. line password. line password RADIUS server. local username Line password.

Explanation/Reference: Explanation: sessions use the vty lines. Builds and maintains the DHCP snooping binding database. Reference: http://www. Rate-limits DHCP traffic from trusted and untrusted sources. Utilizes the DHCP snooping binding database to validate subsequent requests from untrusted hosts. so here the “aaa authentication login default group radius local line” means to use RADIUS first. B.exam.pdf QUESTION 110 Which switch feature determines validity based on IP-to-MAC address bindings that are stored in a trusted database? A. where the configured authentication method is named “default. untrusted hosts with leased IP addresses trusted hosts with leased IP addresses untrusted hosts with available IP addresses trusted hosts with available IP addresses Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: DHCP snooping is a security feature that acts like a firewall between untrusted hosts and trusted DHCP servers. Dynamic ARP Inspection storm control VTP pruning DHCP snooping Correct Answer: A Section: Infrastructure Security http://www. which contains information about untrusted hosts with leased IP addresses.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/snoodhcp. The DHCP snooping feature performs the following activities: Validates DHCP messages received from untrusted sources and filters out invalid messages. D. if that fails use the line password. C.” The AAA default login preference is stated in order from first to last.cisco. Finally. QUESTION 109 Which type of information does the DHCP snooping binding database contain? A. B. C.com/ . then if that fails use the local user database. D.

If a Layer 2 LAN port is connected to a DHCP client.cisco. B. If the ARP packet is received on a trusted interface. If a Layer 2 LAN port is connected to a DHCP server. C. configure the port as trusted by entering the “ip dhcp snooping trust” interface configuration command.html QUESTION 111 Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP server? A.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. On untrusted interfaces. DHCP snooping B. storm control C. spanning-tree portfast http://www. make sure that the devices acting as the DHCP server and the DHCP relay agent are configured and enabled.exam. and enable DHCP globally on the switch.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/snoodhcp. which feature must be enabled on the access VLAN for that interface? A. follow these guidelines: DHCP snooping is not active until you enable the feature on at least one VLAN. the DHCP snooping binding database.html QUESTION 112 When IP Source Guard with source IP filtering is enabled on an interface.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/72846-layer2-secftrs-catl3fixed. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. Before globally enabling DHCP snooping on the switch. the switch forwards the packet only if it is valid. D. configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command. Reference: http://www. the switch forwards the packet without any checks. Reference: http://www. ip dhcp snooping trust ip dhcp snooping ip dhcp trust ip dhcp snooping information Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: When configuring DHCP snooping.com/ .

Reference: http://3c3cc. B.D. multicast. which creates excessive traffic and degrades network performance.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15-0_2_EX/security/configuration_guide/b_sec_152ex_2960-x_cg/ b_sec_152ex_2960-x_cg_chapter_01110. If you enter the ip source binding mac-address vlan vlan-id ip-address interface interface-id global configuration command on a routed interface. Reference: http://www.html QUESTION 113 Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic? A. this error message appears: Static IP source binding can only be configured on switch port.exam. C. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast.1x port-based authentication is enabled. DHCP snooping must be enabled on the access VLAN for that interface. the source IP address filter is applied on all the VLANs.pdf http://www. D. When IP source guard with source IP filtering is enabled on an interface.com/c/en/us/td/docs/routers/7600/ios/122SR/configuration/guide/swcg/dos.com/ .cisco. storm control port security VTP pruning VLAN trunking Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: A traffic storm occurs when packets flood the LAN. You can enable this feature when 802. private VLAN Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: IP Source Guard Configuration Guidelines • You can configure static IP bindings only on nonrouted ports. If you are enabling IP source guard on a trunk interface with multiple VLANs and DHCP snooping is enabled on all the VLANs. or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack.

router(config-if)#storm-control action error D.QUESTION 114 Which command would a network engineer apply to error-disable a switchport when a packet-storm is detected? A.exam. router(config-if)#storm-control action shutdown B.com/ . router(config-if)#storm-control action enable Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Configuring the Traffic Storm Control Shutdown Mode To configure the traffic storm control shutdown mode on an interface. perform this task: http://www. router(config-if)#storm-control action trap C.

1X and Port Security You can configure port security and 802.1x authenticates.html QUESTION 115 A network engineer configures port security and 802. Which option describes what this configuration allows? A.exam. It allows port security to secure the MAC address that 802.1x on the same interface. It allows 802.1x to secure the IP address that port security authenticates.Reference: http://www.1x authenticates. 802.cisco.1X processes packets before port security processes them. Port security secures the MAC addresses that 802.1X authenticates.1X is already preventing inbound traffic on the interface from unknown MAC addresses. It allows 802.1X on the same interfaces. B.com/ . so when you enable both on an interface. Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: 802.1x to secure the MAC address that port security authenticates. 802.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/storm. Reference: http://www. It allows port security to secure the IP address that 802. D.cisco.html http://www.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/guide/sec_nx-os-cfg/sec_portsec. C.

com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/25ew/configuration/guide/conf/port_sec. On an access port. 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. These can be dynamically learned or manually configured. port security applies only to the access VLAN.com/ .cisco. it is not recommended. Reference: http://www. stored in the address table. and added to the running configuration. Although sticky secure addresses can be manually configured. VLAN maximums are not useful for access ports.exam. B. D. The device allows VLAN maximums only for VLANs associated with the trunk port. B.pdf QUESTION 117 On which interface can port security be configured? A. and added to the running configuration? A. stored in the address table. C. sticky dynamic static secure Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: With port security. Trunk ports — You can configure port security on interfaces that you have configured as Layer 2 trunk ports. If these addresses are saved in the configuration file. static trunk ports destination port for SPAN EtherChannel port group dynamic access point Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Port Security and Port Types You can configure port security only on Layer 2 interfaces. C. D. the interface does not need to dynamically relearn them when the switch restarts. you can configure MAC addresses to be sticky.QUESTION 116 Which feature describes MAC addresses that are dynamically learned or manually configured. http://www.

Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. B. This port communicates with P-Ports and ports on the same community VLAN. Reference: http://www.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/guide/sec_nx-os-cfg/sec_portsec.SPAN ports — You can configure port security on SPAN source ports but not on SPAN destination ports. C. C. .org/wiki/Private_VLAN QUESTION 119 When you configure a private VLAN. This port can communicate with anything else connected to the primary or any secondary VLAN. In other words. firewall or other common gateway device. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. B. promiscuous community isolated trunked Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. Reference: http://en.exam.wikipedia. which port type connects the switch to the gateway router? A. which type of port must you configure the gateway router port as? A.cisco. Ethernet Port Channels — Port security is not supported on Ethernet port channels.Community Port (C-Port): Connects to the regular host that resides on community VLAN.html QUESTION 118 When you configure private VLANs on a switch. This port communicates only with P-Ports. D.com/ . D. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port). Host Ports: . Promiscuous port (P-Port): The switch port connects to a router. promiscuous port isolated port community port access port Correct Answer: A http://www.

• Devices on VLAN 20 are restricted to the subnet of 172. Host Ports: . . Host port further divides in two types – Isolated port (I-Port) and Community port (C-port). This port communicates with P-Ports and ports on the same community VLAN. Reference: http://en. Promiscuous port (P-Port): The switch port connects to a router.com/ .40.40.40. • Packets from devices in the subnet of 172. DSW1 and ASW1. The Radius server and application servers will be installed at a future date.0/24.120.Section: Infrastructure Security Explanation Explanation/Reference: Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. For security reasons.Community Port (C-Port): Connects to the regular host that resides on community VLAN.46 • Radius key: rad123 • Authentication should be implemented as close to the host as possible.exam. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server. http://www.wikipedia.120. This port communicates only with P-Ports. 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 have been tasked with implementing the above access control as a pre-condition to installing the servers. Authentication is to be done via a Radius server: • Radius server host: 172. The topology diagram indicates their layer 2 mapping.120. firewall or other common gateway device.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches. Corporate polices do not allow layer 3 functionality to be enabled on the switches. In other words.org/wiki/Private_VLAN Q32 SIMULATION SWITCH. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. You must use the available IOS switch features. This port can communicate with anything else connected to the primary or any secondary VLAN. • Filtering should be implemented as close to the serverfarm as possible.0/24 should be allowed on VLAN 20.Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. • Packets from devices in any other address range should be dropped on VLAN 20.

exam.com/ .http://www.

exam.com/ .http://www.

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 http://www.0.0 0.0.Answer: The configuration: Step1: Console to ASW1 from PC console 1 ASW1(config)#aaa new-model ASW1(config)#radius-server host 172.46 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 172.40.120.39.com/ .exam.120.

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 QUESTION 120 SIMULATION SWITCH. http://www.120.0/24 should be allowed on VLAN 20. For security reasons.120.46 Radius key: rad123 Authentication should be implemented as close to the host as possible.40.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches.40.com/ . Authentication is to be done via a Radius server: Radius server host: 172. Corporate polices do not allow layer 3 functionality to be enabled on the switches.120. You must use the available IOS switch features.exam. Devices on VLAN 20 are restricted to the subnet of 172. Filtering should be implemented as close to the serverfarm as possible. DSW1 and ASW1. Packets from devices in any other address range should be dropped on VLAN 20.0/24. The topology diagram indicates their layer 2 mapping. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server. You have been tasked with implementing the above access control as a pre-condition to installing the servers. 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. Packets from devices in the subnet of 172. The Radius server and application servers will be installed at a future date.40.

com/ .http://www.exam.

exam.com/ .http://www.

Correct Answer: Here is the solution below
Section: Infrastructure Security
Explanation
Explanation/Reference:
The configuration:
Step1: Console to ASW1 from PC console 1
ASW1(config)#aaa new-model
ASW1(config)#radius-server host 172.120.39.46 key rad123
ASW1(config)#aaa authentication dot1x default group radius
ASW1(config)#dot1x system-auth-control
ASW1(config)#inter fastEthernet 0/1
ASW1(config-if)#switchport mode access
ASW1(config-if)#dot1x port-control auto
ASW1(config-if)#exit
ASW1#copy run start
Step2: Console to DSW1 from PC console 2
DSW1(config)#ip access-list standard 10
DSW1(config-ext-nacl)#permit 172.120.40.0 0.0.0.255
http://www.exam.com/

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
QUESTION 121
Which First Hop Redundancy Protocol is an IEEE Standard?
A.
B.
C.
D.

GLBP
HSRP
VRRP
OSPF

Correct Answer: C
Section: Infrastructure Services
Explanation
Explanation/Reference:
Explanation:
A comparison of the three First Hop Redundancy Protocols are listed below:

http://www.exam.com/

http://www.exam.com/

The AVG is responsible for assigning the virtual MAC addresses to each member of the group.html QUESTION 123 What is the maximum number of virtual MAC addresses that GLBP allows per group? A. D. C. 1 5 10 15 Correct Answer: C Section: Infrastructure Services 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.com/ . For each interface configured for hot standby. http://www.com/en/US/docs/switches/lan/catalyst3550/software/release/12. When a tracked interface fails.cisco.wordpress. B.1_19_ea1/configuration/guide/swhsrp. If an interface is not tracked.com/2008/08/23/router-high-availability-protocol-comparison-2/ QUESTION 122 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. the hot standby priority on the device on which tracking has been configured decreases by 10. B. its state changes do not affect the hot standby priority of the configured device. Reference: http://www. you can configure a separate list of interfaces to be tracked.exam. 2 4 6 8 Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: Explanation: GLBP Virtual MAC Address Assignment A GLBP group allows up to four virtual MAC addresses per group.Reference: http://cciethebeginning. C. D.

Reference: http://www. The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address. D.exam. A virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder.html QUESTION 125 Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router? A. Other members of the GLBP group learn the virtual MAC addresses from hello messages. virtual router master virtual router backup virtual router active virtual router standby Correct Answer: A Section: Infrastructure Services http://www. The AVG assigns a virtual MAC address to each member of the GLBP group.cisco. B. D. Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses. Gateways are assigned the next MAC address in sequence. C. These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address.html#wp1039651 QUESTION 124 Which gateway role is responsible for answering ARP requests for the virtual IP address in GLBP? A.com/ . B. A virtual forwarder that has learned the virtual MAC address is referred to as a secondary virtual forwarder. Other group members provide backup for the AVG in the event that the AVG becomes unavailable. active virtual forwarder active virtual router active virtual gateway designated router Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: GLBP Active Virtual Gateway Members of a GLBP group elect one gateway to be the active virtual gateway (AVG) for that group. Reference: http://www.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. C.cisco.Other group members request a virtual MAC address after they discover the AVG through hello messages.

This is the router that. Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN. then it will always become the Master. when up. VRRP advertisements are always sent using the primary IP address as the source of the IP packet. It may participate in one or more virtual routers. Reference: http://www. Note that if the IP address owner is available.com/ . One possible selection algorithm is to always select the first address. TCP connections.org/rfc/rfc3768.exam.Explanation Explanation/Reference: Explanation: VRRP Definitions VRRP Router A router running the Virtual Router Redundancy Protocol. and answering ARP requests for these IP addresses. A VRRP Router may backup one or more virtual routers.ietf. Primary IP Address An IP address selected from the set of real interface addresses. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN.txt QUESTION 126 Which command correctly configures standby tracking for group 1 using the default decrement priority value? http://www. etc. 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. IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address(es’. will respond to packets addressed to one of these IP addresses for ICMP pings.

com/ . C. http://www.com/en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp-hsrp-mgo. QUESTION 127 Which command configures an HSRP group to become a slave of another HSRP group? A.exam. B. C.cisco. Reference: http://www. 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: Infrastructure Services Explanation Explanation/Reference: Explanation: The default decrement value for HSRP standby tracking is 10. D.A. standby slave standby group track standby follow standby group backup Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Perform this task to configure multiple HSRP client groups. HSRP client groups follow the master HSRP with a slight. The “standby follow” command configures an HSRP group to become a slave of another HSRP group. There is no need to explicitly state the value if the desired value is the default value.html QUESTION 128 Refer to the exhibit. B. random delay so that all client groups do not change at the same time.

then some other device with a MAC address reports this error message. In order to resolve this issue.Which option describes the reason for this message in a GLBP configuration? A. http://www.shtml#dr QUESTION 129 Ferris Plastics.255. Currently all interfaces are up. If the interface MAC address is different from the one reported in the error message.com/ . Verify the spanning-tree topology and check if there is any layer2 loop. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. DSW1 – primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 – primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. you have been asked to investigate and respond to the following question. Using the running configurations and show commands. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224. B.0.255.cisco.0 15.102 and User Datagram Protocol (UDP) port 3222 (source and destination). C. issue the show interface command to verify the MAC address of the interface. is a medium sized company. Reference: http://www. unless GigabitEthernet1/0/1 on backup device has also failed.com/en/US/products/hw/switches/ps708/products_configuration_example09186a00807d2520. then it indicates that this router is receiving its own hello packets sent.255.0.0. D.exam. If the MAC address of the interface is the same as the one reported in the error message.0. Troubleshooting has identified several issues. Unavailable GLBP active forwarder Incorrect GLBP IP address HSRP configured on same interface as GLBP Layer 2 loop Correct Answer: D Section: Infrastructure Services Explanation Explanation/Reference: Explanation: This section provides information you can use to troubleshoot your configuration. permit the Multicast address by permit 224. When configuring the multicast boundary command. with an enterprise network (access. Inc. The distribution switches are configured to use HSRP to provide a high availability solution.

com/ .exam.http://www.

exam.com/ .http://www.

com/ . B. 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. C. after GigabitEthemet1/0/1 on DSW1 was reactivated. DSW2 became the active HSRP device for VLAN 101 as desired.During routine maintenance. What needs to be done to make the group for VLAN 101 function properly? A. Enable preempt in the VLAN 101 HSRP group on DSW1. DSW1 did not become the active router for VLAN 101 as desired. However. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: http://www. All other interfaces were up. In the VLAN 101 HSRP group on DSW1. Disable preempt in the VLAN 101 HSRP group on DSW2’s. GigabitEthernet1/0/1 on DSW1 was shut down. D.exam.

http://www. Troubleshooting has identified several issues. DSW1 – primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 – primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. Using the running configurations and show commands. Inc. is a medium sized company.exam. The distribution switches are configured to use HSRP to provide a high availability solution. Currently all interfaces are up.com/ .QUESTION 130 Ferris Plastics. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. unless GigabitEthernet1/0/1 on backup device has also failed. with an enterprise network (access. you have been asked to investigate and respond to the following question.

exam.com/ .http://www.

com/ .exam.http://www.

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

com/ . The left Vlan102 is console1 of DS1. QUESTION 131 Ferris Plastics. http://www. unless GigabitEthernet1/0/1 on backup device has also failed.Use “show run” command to show. with an enterprise network (access. 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. 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. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Priority value is 200. Inc. The distribution switches are configured to use HSRP to provide a high availability solution. Troubleshooting has identified several issues. is a medium sized company. Because 200 – 11 = 189 < 190 (priority of Vlan102 on DS2). Currently all interfaces are up.

exam.http://www.com/ .

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but it should be less than 250 so that if the gig 1/0/1 interface goes down. D. We need to increase the priority of DSW2 to greater than 200. B. DSW2 has not become the active device for the VLAN 103 HSRP group. C. On DSW2. while the local priority is 190. what can be done to make the group function properly? A.com/ . disable preempt. decrease the priority value to a value less than 190 and greater than 150. DSW1 will become active.All interfaces are active. increase the priority value to a value greater 200 and less than 250. increase the decrement value in the track command to a value greater than 10 and less than 50. but less than 250. On DSW2. http://www. As related to the VLAN 103 HSRP group. Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: From the output shown below of the HSRP status of DSW2. On DSW1. DSW2 is configured to decrement the priority by 50 if this interface goes down. so the correct answer is to increase the priority to more than 200.exam. we see that the active router has a priority of 200. On DSW1.

DSW1 – primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 – primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. unless GigabitEthernet1/0/1 on backup device has also failed. with an enterprise network (access. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.exam. http://www. Inc. Using the running configurations and show commands. Troubleshooting has identified several issues. The distribution switches are configured to use HSRP to provide a high availability solution. you have been asked to investigate and respond to the following question.QUESTION 132 Ferris Plastics.com/ . Currently all interfaces are up. is a medium sized company.

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On DSW1.During routine maintenance. Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: http://www. disable preempt. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1 and DSW2. B. On DSW2 decrease the priority value to a value less than 150. During this time. decrease the decrement value in the track command to a value less than 1. On DSW1. what can to be done to make the group function properly? A. D. As related to the VLAN 104HSRP group. increase the decrement value in the track command to a value greater than 6. All other interfaces were up. C.exam. DSW1 became the active router for the VLAN 104HSRP group. On DSW1.com/ .

Vlan104 (left): 150 – 6 = 144. Vlan104 (right): 200 – 155 = 145. The distribution switches are configured to use HSRP to provide a high availability solution. DSW1 – primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 – primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. By do that.We should NOT disable preempt on DS1. Troubleshooting has identified several issues. 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. Inc. Result is priority 144 < 145 (vlan104 on DS2 is active). Currently all interfaces are up. QUESTION 133 Ferris Plastics. with an enterprise network (access. It can not become active device when G1/0/1 on DS2 fail. G0/1/0 on DS1 & DS2 is shutdown. Result is priority 149 > 145 (Vlan104 on DS1 is active). Vlan104 (left): 150 – 1 = 149.exam. unless GigabitEthernet1/0/1 on backup device has also failed. is a medium sized company. http://www. In this question. you will make Vlan104’s HSRP group fail function. If increase the decrement in the track value to a value greater than 6 (> or = 6). Example: if we are disable preempt on DS1.com/ . Using the running configurations and show commands.

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What is the priority value of the VLAN 105 HSRP group on DSW2?
A.
B.
C.
D.

50
100
150
200

Correct Answer: B
Section: Infrastructure Services
Explanation
Explanation/Reference:
Explanation:
Use "show standby brief" command on console2. Very easy to se“ priority of Vlan1”5 is 100.

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QUESTION 134
Ferris Plastics, Inc. is a medium sized company, with an enterprise network (access, distribution and core switches) that provides LAN connectivity from user PCs
to corporate servers. The distribution switches are configured to use HSRP to provide a high availability solution.
DSW1 - primary device for VLAN 101 VLAN 102 and VLAN 105
D–W2 - primary device for VLAN 103 and VLAN 104
A failure–of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device, unless GigabitEthernet1/0/1 on
backup device has also failed.
Troubleshooting has identified several issues. Currently all interfaces are up. Using the running configurations and show commands, you have been asked to
investigate and respond to the following question.

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http://www.exam.com/

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what will be the resulting priority value of the VLAN 105 HSRP group on router DSW2? A. the current priority for VLAN 105 is 100. 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.exam. 90 100 150 200 Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation As seen below.com/ . D. B. C. http://www.If GigabitEthemet1/0/1 on DSW2 is shutdown.

QUESTION 135 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.exam. http://www.com/ .

com/ .http://www.exam.

com/ .exam.http://www.

http://www. B. so all outgoing traffic will be forwarded to R1. R2-50% R2-100% R1-100% Correct Answer: D Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Based on the following output. C.16.exam. we see that R1 is the active standby router for the Ethernet 0/0 link.10.com/ .0/24 subnet is being forwarded through R1? A. D.What percentage of the outgoing traffic from the 172. R1-0% R1-50 %.

They have questions about how these two devices will perform in the event of a device failure. http://www.exam.com/ .QUESTION 136 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.

http://www.com/ .exam.

exam.http://www.com/ .

Refer to the exhibit. The interface will have the priority decremented by 40 for HSRP group 1. If router R1 interface Etherne0/0 goes down and recovers.exam. C.com/ . B. 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 Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: http://www. E. D. which of the statement regarding HSRP priority is true? A.

Here is the HSRP configuration seen on R1: Here. http://www. when the Ethernet 0/0 interface goes down. They have questions about how these two devices will perform in the event of a device failure.com/ . it will then increment it by 40 back to 130 for HSRP group 1. the standby 1 track decrement command will lower the priority from 130 to 90. However. QUESTION 137 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. when it comes back up.exam.

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com/ .exam.http://www.

What issue is causing Router R1 and R2 to both be displayed as the HSRP active router for group 2?
A.
B.
C.
D.
E.

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

Correct Answer: B
Section: Infrastructure Services
Explanation
Explanation/Reference:
Explanation:

http://www.exam.com/

Based on the configuration output, we see that authentication is configured on R2, but not on R1:

This can be further verified by issuing the “show standby” command on each router.

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QUESTION 138
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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exam.http://www.com/ .

http://www.com/ .exam.

0c07.0000.exam.0000. B.ac01 4000.0c07.com/ .ac02 0000. E.0c07. C. D.ac02 4000.0010 0000.What is the virtual mac-address of HSRP group 1? A.ac01 4000.0000.0010 Correct Answer: B Section: Infrastructure Services Explanation http://www. F. 0000.

0000.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 as shown below: http://www.com/ .exam.

C. a network analyzer is connected to Port f0/1 of a LAN switch. Which command can prevent BPDU transmission on this port? A. B. When troubleshooting a network problem.exam. spanning-tree portfast bpduguard enable spanning-tree bpduguard default spanning-tree portfast bpdufilter default no spanning-tree link-type shared http://www.QUESTION 139 Refer to the exhibit. D.com/ .

) A. traffic is not being replicated to the remote switch. Which type of misconfiguration is a cause? A. C. LACP system priority LACP port priority interface MAC address system ID port number hot-standby link identification number interface bandwidth Correct Answer: ABDE Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 141 RSPAN has been configured on a Cisco Catalyst switch. however.com/ . The local and remote RSPAN switches are configured using different session IDs. B. The local RSPAN switch is replicating only Rx traffic to the remote switch. C. G.Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 140 Which four LACP components are used to determine which hot-standby links become active after an interface failure within an EtherChannel bundle? (Choose four. D. B.exam. Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: http://www. F. E. The RSPAN designated VLAN is missing the remote span command. D. The local switch is overloaded with the amount of sourced traffic that must be replicated to the remote switch.

B. D. a Network Administrator noticed that one port stops receiving UDLD packets. E.QUESTION 142 After UDLD is implemented. Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 143 To follow the Layer 2 switching guidelines. Normal UDLD operations that prevent traffic loops. B. This port continues to reestablish until after eight failed retries. The port then transitions into the errdisable state. UDLD is enabled globally. UDLD timers are inconsistent. D.com/ . UDLD port is configured in aggressive mode. Which version of spanning tree is appropriate to meet the company policy? A. MST PVST+ RSTP RPVST+ STP Correct Answer: A Section: Mix QUESTIONS Explanation http://www.exam. a network engineer decides to create a separate spanning tree for every group of 10 VLANs. C. Which option describes what causes the port to go into the errdisable state? A. C.

com/ . Configure a SPAN session to monitor the received traffic on interface g0/4 for all VLANs except VLAN 3. B. Configure a SPAN session to monitor the received traffic on interface g0/4 only for VLAN 3. C. BPDUblock BPDUfilter BPDUignore BPDUguard BPDUdisable Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 145 Refer to the exhibit. D. end user connectivity is still required. What is the result of the SPAN configuration on a Cisco switch? A. however. The engineer does not want this switch participating in Spanning Tree with the rest of the network. B. Configure a SPAN session to monitor the received traffic on interface g0/5 only for VLAN 3.exam. C. Correct Answer: A Section: Mix QUESTIONS http://www. Which spanning-tree feature accomplishes this? A.Explanation/Reference: QUESTION 144 A network engineer is installing a switch for temporary workers to connect to. Configure a SPAN session to monitor the received traffic on interface g0/5 for all VLANs except VLAN 3. D. E.

A sticky MAC address is lost when the switch reboots. which action must be performed for the configuration to take effect? A. C. B. BPDU filtering http://www. C. D. B.com/ . Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 148 Enablement of which feature puts the port into err-disabled state when the port has PortFast enabled and it receives BPDUs? A. A sticky MAC address ages out of the MAC address table after 600 seconds. reload shutdown write memory backup config Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 147 Which statement about the MAC address sticky entries in the switch when the copy run start command is entered is true? A. A sticky MAC address can be a unicast or multicast address.Explanation Explanation/Reference: QUESTION 146 When SDM templates are configured. A sticky MAC address is retained when the switch reboots. D.exam.

Which configuration ensures that the Cisco Discovery Protocol packet update frequency sent from DSW1 to ALS1 is half of the default value? http://www. EtherChannel D.com/ . BackboneFast C. BPDU guard Correct Answer: D Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 149 Refer to the exhibit.exam.B.

D.1Q trunking PortFast QoS private VLANs http://www. C. and then the VLAN is deleted.exam. D. 802. but they are reassigned to the default VLAN. F. DSW1(config)#cdp timer 90 DSW1(config-if)#cdp holdtime 60 DSW1(config)#cdp timer 30 DSW1(config)#cdp holdtime 90 DSW1(config-if)#cdp holdtime 30 DSW1(config-if)#cdp timer 60 Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 150 Interfaces are assigned to a VLAN. B. They go down until they are reassigned to a VLAN.com/ .A. They remain up. Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 151 Which feature is automatically configured when an administrator enables a voice VLAN? A. C. but they are reassigned to the native VLAN. Which state are these interfaces in after the VLAN is deleted? A. B. D. B. They go down. They remain up. C. E. but they are reassigned to the default VLAN.

version 1 version 2 version 3 VTP does not recognize extended VLANs. Which version of VTP supports these extended VLANs? A.exam. B. C. It can cause a network-wide VLAN configuration change if the revision number on the new switch is lower.com/ . B. D. It can cause a network-wide VLAN configuration change if the revision number on the new switch is higher. Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 154 http://www. D. C. It can cause network access ports to go into err-disabled state.Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 152 Which statement describes one major issue that VTP can cause in an enterprise network when a new switch is introduced in the network in VTP mode server? A. Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 153 A network administrator configures 10 extended VLANs ranging from VLANs 3051 to 3060 in an enterprise network. It can cause routing loops.

If the EtherChannel mode on switch 1 is configured to active.) A. D. The IP address is placed on the port-channel logical interface.An engineer is configuring an EtherChannel between two switches using LACP. B. Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 156 Which option is valid for EtherChannel load balancing? A. C. C.com/ . B.exam. The IP address is placed on the lowest numbered member port. B. E. which statement about placement of the IP address is true? A. D. which two modes on switch 2 establish an operational EtherChannel? (Choose two. The IP address is assigned via DHCP only. C. source MAC address and source IP address destination MAC address and destination IP address source MAC address and destination IP address source MAC address and destination MAC address http://www. D. active auto desirable on passive Correct Answer: AE Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 155 When a Layer 2 EtherChannel is configured. The IP address is placed on the highest numbered member port.

com/ . http://www.exam.Correct Answer: D Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 157 Refer to the exhibit.

B. C. Switch 1 does not have enough member ports configured. The port channel interface numbers do not match.An engineer is configuring EtherChannel between two switches and notices the console message on switch 2. which option describes the reason for this error? A. Based on the output.exam. The EtherChannel protocols do not match. http://www. D. Correct Answer: D Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 158 Refer to the exhibit. Switch 2 has too many member ports configured.com/ .

Configure DSW1 with the same version number.com/ . and VLAN-to-instance mapping as shown on DSW2. DSW1 automatically inherits MST configuration from DSW2 because they have the same domain name. therefore. DSW2 uses the VTP server mode to automatically propagate the MST configuration to DSW1. C. revision number.exam. DSW1 is in VTP client mode with a lower configuration revision number. D. it automatically inherits MST configuration from DW2. and VLAN-to-instance mapping as shown on DSW2. B. Configure DSW1 with the same region name. Which statement is true? A. Correct Answer: D Section: Mix QUESTIONS Explanation http://www.DSW1 should share the same MST region with switch DSW2. E.

16 Gbps 32 Gbps 64 Gbps 128 Gbps Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 161 Refer to the exhibit. Correct Answer: BD Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 160 In a switch stack environment. B. C. E. B. C. http://www. The source port can be only an Ethernet physical port. what is the total bidirectional traffic flow between two logical counter-rotating paths? A. The destination port does not participate in STP. The destination port can be destination in multiple SPAN sessions.com/ .Explanation/Reference: QUESTION 159 Which two statements about SPAN source and destination ports during an active session are true? (Choose two. The source port can be monitored in multiple SPAN sessions.) A. D. You can mix individual source ports and source VLANs within a single session. D.exam.

com/ . spanning trees http://www.exam. C. VLAN database B. D. Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 162 Which information does the subordinate switch in a switch stack keep for all the VLANs that are configured on it? A.Which statement about the SPAN and RSPAN configuration on SW1 is true? A. RSPAN session 1 monitors activity on VLAN 50 of a remote switch. B. DHCP snooping database C. SPAN session 2 monitors all traffic entering and exiting port FastEthernet 0/15. RSPAN session 1 is incompletely configured for monitoring. SPAN session 2 only monitors egress traffic exiting port FastEthernet 0/14.

D. C. D.exam. 1000 bindings 2000 bindings 5000 bindings 8000 bindings Correct Answer: D Section: Mix QUESTIONS Explanation Explanation/Reference: http://www. B.com/ . routing information Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 163 Which option is the minimum number of bindings that the DHCP snooping database can store? A.