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

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

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

and C are trunked together and have been properly configured for VTP. VTP authentication is required when using extended VLANs because of their ability to cause network instability. What is the most probable cause of this behavior? http://www. Switch C receives VLAN information from the VTP server Switch A. Switch A. VTP version 3 supports extended-range VLANs (VLAN numbers 1006 to 4094).pdf QUESTION 8 Refer to the exhibit. You must configure extended-range VLANs manually on each network device.C. the VLANs in the range 1006 to 4094 are removed from VTP control.com/ . D. but Switch B does not receive any VLAN information. B.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/15.1SY/config_guide/sup2T/vtp. 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).exam. If you convert from VTP version 3 to VTP version 2. Extended VLANs will not propagate to different IOS versions when extended VLANs are in use. Reference: http://www. Ensure that all switches run the same Cisco IOS version.

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

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

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

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

com/ .html#wp1126206 QUESTION 14 While working in the core network building. 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.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. B. D. a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber. C.exam. As designed. After the damaged cable was replaced. E. the link did not recover.cisco. What solution allows the network switch to automatically recover from such an issue? A.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/CLIConfigurationGuide/MACAddress.

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

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

The EtherChannels would form. The EtherChannels would form and both devices would use the dst-ip load-balancing method because Switch1 is configured with EtherChannel mode active. The table below summarizes the results for LACP channel establishment based on the configuration of each side of a link: LACP Channel Establishment http://www.exam. 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. C.com/ . B. The EtherChannels would form and function properly even though the load-balancing and EtherChannel modes do not match. The EtherChannels would not form because the load-balancing method must match on the devices.What is the result of the configuration? A. D. but network loops would occur because the load-balancing methods do not match.

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

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

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

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

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

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

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

F. The first thing that should be done is to verify that the trunk http://www. E. C. Reload the new switch. Reference: https://learningnetwork. B.asp?p=2181837&seqNum=8 QUESTION 29 Which two protocols can be automatically negotiated between switches for trunking? (Choose two.com/articles/article.exam. Restart the VTP process on the new switch. Verify connected trunk ports. D.ciscopress.com/servlet/JiveServlet/previewBody/14792-102-1-57313/Dynamic%20Trunking%20Protocol.cisco. Reload the VTP server.com/ .PDF QUESTION 30 A network is running VTPv2. the network engineer notices that the new switch is not receiving the list of VLANs from the server. B. 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 802.1Q or ISL trunking encapsulation.) A. C. the switchport trunk encapsulation [dot1q | isl | negotiate] interface command must be used prior to the switchport mode trunk command.Reference: http://www. After verifying all VTP settings. Which action resolves this problem? A. D. 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.

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

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

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

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

enable the STP PortFast feature. VLANs 1 through 1005 are allowed on each trunk by default. the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state. B. VLAN traffic can be removed from the allowed list. The port still participates in STP. This keeps traffic from the VLANs from passing over the trunk link. perform these steps: 1.exam. So if the port is to be a part of the loop. E.cisco. For their disaster recovery feature to operate successfully. C. This removes specific VLANs from the allowed list.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. However. Note: The allowed VLAN list on both the ends of the trunk link should be the same. all of the configured VLANs are allowed to send and receive traffic across the link. PortFast immediately transitions the port into STP forwarding mode upon linkup.informit. issue the switchport trunk vlan-Iist interface configuration command. Example configuration: Switch-C# configure terminal Switch-C(config)# interface range fa0/3 . Which spanningtree feature satisfies this requirement? A.com/ . the port eventually transitions into STP blocking mode.com/library/content.com/document/11836/how-define-vlans-allowed-trunk-link QUESTION 38 For client server failover purposes.Explanation/Reference: Explanation: When a trunk link is established. D. they require the switchport to enter a forwarding state immediately.24 Switch-C(config-if-range)# sp–nning-tree portfast Reference: http://www. 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. To restrict the traffic that a trInk carries. For Integrated Cisco IOS Software based switches.

B. C.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.html http://www.f2d2. D.216 128.9000 2 sec Max Age 20 sec Forward Delay 15 sec 300 sec Sts --FWD BLK Cost --------9 9 Prio.A. 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.exam.57d8. E.Nbr -------128.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2.com/ .cisco.232 Type --------------------------P2p P2p Reference: http://www.

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

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

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

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

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

cisco.shtml QUESTION 48 What is the default value for the errdisable recovery interval in a Cisco switch? A.com/ .com/en/US/docs/ios/lanswitch/command/reference/lsw_m1.html QUESTION 47 Which option is a possible cause for an errdisabled interface? A. B. Reference: http://www. C.cisco.Usage Guidelines MAC-move notification generates a syslog message whenever a MAC address or host moves between different switch ports.exam. D. 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 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. 30 seconds http://www.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.

-------------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.com/ . 43sernads D.cisco.B. The show errdisable recovery command shows the default error-disable recovery state for all the possible conditions.shtml QUESTION 49 Which statement about LLDP-MED is true? http://www. Issue the shutdown command and then the no shutdown interface mode command on the associated interface in order to manually reenable the ports. Reference: http://www. you must reenable the ports manually.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b. 600 seconds Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: After you fix the root problem. the ports are still disabled if you have not configured errdisable recovery on the switch. the timeout feature is disabled. 100 seconds C.exam. cat6knative#show errdisable recovery ErrDisable Reason Timer Status ----------------. The errdisable recovery command allows you to choose the type of errors that automatically reenable the ports after a specified amount of time. In this case. by default.

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

B. If more than one VLAN is needed. QUESTION 53 Refer to the exhibit.org/wiki/IEEE_802. http://www. D. 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. C.exam. the port should be configured as a trunk port.A.1Q QUESTION 52 What is the maximum number of VLANs that can be assigned to an access switchport without a voice VLAN? A. allowing up to 4.com/ . B.094 VLANs Reference: http://en. 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. D. The hexadecimal values of 0x000 and 0xFFF are reserved. C.wikipedia. All other values may be used as VLAN identifiers.

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

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

The Port Fast feature is automatically enabled when voice VLAN is configured. the Port Fast feature is not automatically disabled. 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. spanning tree D. Use the show vlan privileged EXEC command to see if the VLAN is present (listed in the display). D.com/ . The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN. C. 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. When you disable voice VLAN.1q header found? A. B.cisco.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_22_ea11x/configuration/guide/swvoip. Reference: http://www.html QUESTION 55 In which portion of the frame is the 802.exam.C.

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

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

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

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. C.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol. Consider that this is a multivendor environment. only 802.exam. C. but version 1 does not.A. D. The VTP domain names do match and they are both VTP servers so there are no issues there. QUESTION 61 Which statement about using native VLANs to carry untagged frames is true? A. 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.1Q and ISL. 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. Disable DTP and document the VTP domain mismatch. B. Cisco Discovery Protocol version 2 carries native VLAN information. Of these. B. http://www.com/ . Delete vlan. D. Manually force trunking with switchport mode trunk on both switches. 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. Which Cisco IOS switching feature can be used to achieve the task? A.dat and ensure that the switch with lowest MAC address is the VTP server. 802. There are 2 different methods for trunking. Enable the company B switch with the vtp mode server command.

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

not via DTP messages. Upgrade to VTP version 3 for advanced feature set support. 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.com/library/content. Which Cisco IOS feature can be used to achieve this task? A. http://www.informit. Native VLAN mismatches are detected via spanning tree and Cisco Discovery Protocol (CDP). however.cisco. 802. C.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. Reference: http://www. Failure to do this causes Cisco switches to partially shut down the trunk port because having mismatched native VLANs can result in spanning-tree loops. both with native VLAN mismatch. but 1 (the default native VLAN) on the other switch.1q trunks are on both sides. spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on the trunk. If you use 802.1Q trunks. Reference: http://www. you must ensure that you choose a common native VLAN for each port in the trunk. D.exam.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/24330-185.com/ . 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. The “vtp pruning” command prunes VLANs automatically. If spanning tree detects a native VLAN mismatch. the trunk still remains up for other VLANs. which stops the inefficient flooding of frames where they are not needed.html QUESTION 64 Which action allows a network engineer to limit a default VLAN from being propagated across all trunks? A. B. VLAN ID 1 should not be used for management traffic because its unsafe. D.

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

C. G0/2. A VLAN tag adds 4 bytes to the frame. D. The port priority can be configured automatically or through the CLI.How many bytes are added to each frame as a result of the configuration? A. Configure LACP port-priority on G0/1 to 1. and G0/4 between two switches using Ethernet port-channel. all VLAN packets are tagged on the trunk link. LACP traffic goes through G0/4 because it is the highest interface ID. the other two bytes for tag control information (TCI). B. Two bytes are used for the tag protocol identifier (TPID). QUESTION 67 A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1.exam. 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. Configure LACP port-priority on G0/1 to 65535. http://www. Which action allows interface G0/1 to always actively forward traffic in the port-channel? A. G0/3.1Q trunking. B. LACP uses the port priority with the port number to form the port identifier. 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. Configure G0/1 as half duplex and G0/2 as full duplex. D. C. the lower the priority.com/ . Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: A LACP port priority is configured on each port using LACP. The higher the number. The valid range is from 1 to 65535. The default is 32768. except the native VLAN.

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

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

The formation of a channel is desired. This is similar to the auto mode in PAgP. fa0/14. and on-on will allow a channel to be formed. however. and on. To increase bandwidth. as shown here: Server_Switch#sh etherchannel load-balance http://www. The peer (in active state) initiates negotiation (when it sends out an LACP packet) which we receive and answer. and fa0/15 are all in Port Channel 12.exam. the switch neither sends the LACP packet nor processes any inbound LACP packet. desirable-desirable. the network engineer configured an EtherChannel on interfaces Fa1/0 and Fa0/1 of the server farm switch. The channel is forced to remain down. Active: We can form an aggregate link and initiate the negotiation. This is similar to the off state for PAgP. 2.In other words. it is not initiated.com/ . QUESTION 70 Refer to the exhibit. which is only a PAgP mode.D. Users of PC-1 experience slow connection when a webpage is requested from the server. on: PAgP will not run. auto: PAgP is running passively. In this example. The link aggregate is formed if the other end runs in LACP active or passive mode. This is similar to the desirable mode of PAgP. . we see that fa 0/13. Off: The link aggregation is not formed. eventually to form the aggregation channel with the peer. Only the combinations auto-desirable. The Link Aggregate Control Protocol (LACP) trunking supports four modes of operation: On: The link aggregation is forced to be formed without any LACP negotiation . 3. Link Aggregation Control Protocol Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PAgP modes are off. off: PAgP will not run. The formation of a channel is desired and initiated. desirable: PAgP is running actively. The channel is forced to come up. Passive: The switch does not initiate the channel but does understand inbound LACP packets. desirable. 1. 4. We do not send or understand the LACP packet. This is similar to the on state for PAgP. which is operating in desirable mode. auto.

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

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

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

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

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

com/ . Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16. 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.exam. C. B. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16. Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0. 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. Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0. D.

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

exam. The switch priority value is zero. Considering the default cost of upstream bridges to the root bridge is equal. interface f0/13 http://www. All ports are members of VLAN 10.1_9_ea1/configuration/guide/swstp. the more likely the switch will be chosen as the root switch. D.com/en/US/docs/switches/lan/catalyst2950/software/release/12. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: For priority. Reference: http://www.html#wp1020666 QUESTION 78 Refer to the exhibit. which option will be the new root port for VLAN 10? A. The lower the number. the range is 0 to 61440 in increments of 4096.cisco.19 and all ports are forwarding. it has the lowest priority value for VLAN 1. C. The bridge priority is 128.B. The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”. the default is 32768.com/ .

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

Reference: http://net.exam. The port goes into loop-inconsistent state and stops forwarding traffic. the port does not go through the spanning-tree listening. D. and forwarding states. and forwarding states. Correct Answer: D Section: Layer 2 Technologies http://www. STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately. If an interface is enabled for portfast receives BDPU. and forwarding states should be used.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. If an interface is enabled for portfast receives BDPU. then the default action of STP of listening. bypassing the listening and learning states.cmed. Switchone(config) # Spanning-tree portfast bpdufilter default Which statement about the spanning-tree portfast feature on the switch is true? A. STP still monitors incoming BPDUs that would indicate it should return to the blocking state to prevent a loop. the port goes into the spanning-tree inconsistent state. 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. However. C. the port is shut down immediately. learning. B. The port goes into root-inconsistent state and stops forwarding traffic.Forwarding – A port receiving and sending data. B. learning. The port goes into errdisabled state and stops forwarding traffic. QUESTION 81 Which statement describes what happens when a port configured with root guard receives a superior BPDU? A. The port goes into BPDU-inconsistent state and stops forwarding traffic. If an interface is enabled for portfast receives BDPU. If an interface is enabled for portfast receives BDPU. the port goes through the spanning-tree listening.com/ . bypassing the listening and learning states.3.us/Home/ethernet-and-ip/spanning-tree-protocol QUESTION 80 A network engineer configured an Ethernet switch using these commands. C. the “Spanning-tree portfast bpdufilter default” command specifies that if a BPDU is received on that port. D. learning. normal operation.

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

The virtual switch members reload. The VSS transitions to the dual active recovery mode. 8 D. the VSS will transition to the dual active recovery mode. The dual active state is detected rapidly (subsecond) by any of the following three methods: Enhancement to PagP used in MEC with connecting Cisco switches L3 Bidirectional Forwarding Detection (BFD) configuration on a directly connected link (besides VSL) between virtual switch members or through an L2 link through an access layer switch L2 Fast-Hello Dual-Active Detection configuration on a directly connected link (besides VSL) between virtual switch members (supported with 12. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Q. B. The VSS transitions to the dual active recovery mode. Both virtual switch members cease to forward traffic. Reference: http://www.html QUESTION 84 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A.com/ .B. What happens if all VSL connections between the virtual switch members are lost? A. 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. If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up.exam.2(33)SXI) http://www. 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. and both virtual switch members continue to forward traffic independently. 6 C. and only the new active virtual switch continues to forward traffic.cisco. C.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b. D.

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

• 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. 21. • 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.11/24 Inter-switch Connectivity Configuration Requirements • For operational and security reasons trunking should be unconditional and Vlans 1.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. This mode should be done with a non-proprietary protocol. • Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. http://www.1. • SwitchB VTP mode needs to be the same as SwitchA. with SwitchA controlling activation.com/ .168.exam. 22 and 23 should tagged when traversing the trunk link.

exam.com/ .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.

com/ .21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.name Engineering ! ! interface FastEthernet0/3 switchport trunk allowed vlan 1.21-23 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.exam.

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 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.com/ .255.255.1.21-23 ! interface Vlan1 ip address 192.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/21 switchport access vlan 21 http://www.168.exam.11 255.0 ! 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.

which has a partial configuration and has been attached to RouterC as shown in the topology diagram.1. No trunking has been configured on RouterC.168. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1.exam. RouterC is correctly configured.com/ . http://www. You do not have access to RouteC. All routes must be learned via EIGRP 65010 routing protocol.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 192.1 ! ! End QUESTION 87 SIMULATION You have been tasked with configuring multilayer SwitchC. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links. Also SwitchC needs to be able to ping server S1. Company policies forbid the use of static or default routing.

Routed interfaces should use the lowest host on a subnet when possible.10.32/27 – 190. SwitchC uses Cisco as the enable password.com/ . All routes must be learned via the EIGRP routing protocol. Routing must only be enabled for the specific subnets shown in the diagram.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway. The following subnets are available to implement this solution: – 10.250.0/24 – 190. Company policies forbid the use of static or default routing. http://www.exam.200.250. Note: Due to administrative restrictions and requirements you should not add or delete VLANs. changes VLAN port assignments or create trunks.200.10.

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

0.255.64 0.0.200. so you will not miss within it in the exam.255.32 0. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.200.200.64 0.0 0. even without “no auto-summary” command the network still works correctly.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 10.10. no neighbor relationship is formed between RouterC and SwitchC. Also some reports said the “no auto-summary” command can’t be used in the simulator. also don’t modify/delete any port just do the above configuration.0. we are pretty sure instead of using two commands “network 190. Use the console access to the existing and new switches to configure and verify correct device configuration.250. just for sure.32 0. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.0.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190.10.0.31″ we can use one simple command “network 190. only the summarized network 190.0.0.0/16 is not used anywhere else in this topology.0″ because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised.255. 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.65 255. But after finishing the configuration.255.255.10.0 is shown.31 SwitchC(config-router)# network 190. But in the exam the sim is just a flash based simulator so we should use two above commands.10.250. In fact.0 ->RouterC has used IP 10.250. In order to complete the lab.exam.200.0.0.65 Now we have enough information to configure SwitchC (notice the EIGRP AS in this case is 650) Note: VLAN2 and VLAN3 were created and gi0/10.31″ and “network 190.255.200. gi0/11 interfaces were configured as access ports so we don’t need to configure them in this sim.33 255. http://www.250.200. If you use wrong AS number. SwitchC(config-if)# ip address 10.250.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED.+ Default gateway: 190. the simulator does not let you assign IP address on Gi0/1 interface.10.1 so this is the lowest usable IP address. QUESTION 88 You have been asked to install and configure a new switch in a customer network. in fact it is not necessary because the network 190. we can use “show run” command to verify.0.com/ .200.255 SwitchC(config-router)# network 190.200.0.0.0.200.250.250. you should expect the ping to SERVER to succeed from the MLS.10.2 255.200. and from the PCs as well.

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com/ . 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.You are connecting the New_Switch to the LAN topology.

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

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

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

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

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

com/ .exam. SW2. but SW4 is a client. http://www. so we will need to add both VLANs to SW1 and SW2.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.

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

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Disable VTP pruning on SW1 only Disable VTP pruning on SW2 only Disable VTP pruning on SW4 only Disable VTP pruning on SW2. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: http://www.Examine the VTP configuration. E. D. SW4 and New_Switch Disable VTP pruning on New_Switch and SW4 only.com/ .exam. You are required to configure private VLANs for a new server deployment connecting to the SW4 switch. Which of the following configuration steps will allow creating private VLANs? A. C. B.

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

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

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

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

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

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

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

Which option decreases consumption of bandwidth used by broadcast traffic? http://www.7b00.pdf QUESTION 102 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server. D.) A. B. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/53SG/configuration/config/port_sec. If a port is in per-VLAN errdisable mode.1545 Dynamic 2 FastEthernet0/5 QUESTION 103 While troubleshooting a network outage.e289 Dynamic 1 FastEthernet0/1 0010. 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 ------------------.-----------.cisco.-------------------0010.exam.configuration command or you can manually reenable it by entering the shutdown and no shut down interface configuration commands.1540 Dynamic 2 FastEthernet0/5 0010. This is the default mode. 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.---. Which two commands help trace this PC when the MAC address is known? (Choose two. You can also customize the time to recover from the specified error disable cause (default is 300 seconds) by entering the errdisable recovery interval interval command. switch# 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/ .7b00. E.0de0. Reference: http://www. C.

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

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

Reference: http://www.exam. the authentication service is transparent to the client. Which login credentials are required when connecting to the console port in this output? A. none required 115sernamee cisco with password cisco no username with password linepass login authentication default http://www.cisco.Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: With 802. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server.1x.com/ . the authentication server — performs the actual authentication of the client. Because the switch acts as the proxy.pdf QUESTION 107 Refer to the exhibit. B. D. The authentication server validates the identity of the client and notifies the switch whether or not the client is authorized to access the LAN and switch services.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/12-1_19_ea1/configuration/guide/2940scg_1/sw8021x. C.

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

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

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

the source IP address filter is applied on all the VLANs. When IP source guard with source IP filtering is enabled on an interface. If you enter the ip source binding mac-address vlan vlan-id ip-address interface interface-id global configuration command on a routed interface. You can enable this feature when 802. which creates excessive traffic and degrades network performance. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast. 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.1x port-based authentication is enabled. 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.exam. Reference: http://3c3cc. B.cisco. this error message appears: Static IP source binding can only be configured on switch port.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. Reference: http://www. If you are enabling IP source guard on a trunk interface with multiple VLANs and DHCP snooping is enabled on all the VLANs.pdf http://www. C.D.com/ .com/c/en/us/td/docs/routers/7600/ios/122SR/configuration/guide/swcg/dos. D. DHCP snooping must be enabled on the access VLAN for that interface. or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack. multicast.html QUESTION 113 Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic? A.

exam.com/ . router(config-if)#storm-control action shutdown B. router(config-if)#storm-control action error D. 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.QUESTION 114 Which command would a network engineer apply to error-disable a switchport when a packet-storm is detected? A. router(config-if)#storm-control action trap C.

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

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

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

In other words.exam. • Packets from devices in any other address range should be dropped on VLAN 20. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. .40.Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. it is necessary to restrict access to VLAN 20 in the following manner: • Users connecting to VLAN 20 via portfO/1 on ASW1 must be authenticated before they are given access to the network. The Radius server and application servers will be installed at a future date.org/wiki/Private_VLAN Q32 SIMULATION SWITCH. Corporate polices do not allow layer 3 functionality to be enabled on the switches. • Filtering should be implemented as close to the serverfarm as possible. For security reasons. This port can communicate with anything else connected to the primary or any secondary VLAN. firewall or other common gateway device.120. http://www. DSW1 and ASW1. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.40.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches. • Packets from devices in the subnet of 172. This port communicates with P-Ports and ports on the same community VLAN.Community Port (C-Port): Connects to the regular host that resides on community VLAN.wikipedia. Host Ports: . The topology diagram indicates their layer 2 mapping. You must use the available IOS switch features.40. Reference: http://en.0/24.120. Promiscuous port (P-Port): The switch port connects to a router.46 • Radius key: rad123 • Authentication should be implemented as close to the host as possible.com/ .0/24 should be allowed on VLAN 20.120. • Devices on VLAN 20 are restricted to the subnet of 172. You have been tasked with implementing the above access control as a pre-condition to installing the servers. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port). This port communicates only with P-Ports. Authentication is to be done via a Radius server: • Radius server host: 172.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.

com/ .http://www.exam.

http://www.com/ .exam.

120.255 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.com/ .39.0.0 0.0.exam.40.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 172.120.

40.exam. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.0/24.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.40. For security reasons. Packets from devices in any other address range should be dropped on VLAN 20. Devices on VLAN 20 are restricted to the subnet of 172. 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.46 Radius key: rad123 Authentication should be implemented as close to the host as possible. http://www. Corporate polices do not allow layer 3 functionality to be enabled on the switches.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches.120. The Radius server and application servers will be installed at a future date.0/24 should be allowed on VLAN 20.120.40. The topology diagram indicates their layer 2 mapping. Packets from devices in the subnet of 172.120.com/ . You must use the available IOS switch features. DSW1 and ASW1. Authentication is to be done via a Radius server: Radius server host: 172. Filtering should be implemented as close to the serverfarm as possible.

http://www.exam.com/ .

com/ .exam.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:

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http://www.exam.com/

cisco. Reference: http://www. If an interface is not tracked. http://www. B.exam. The AVG is responsible for assigning the virtual MAC addresses to each member of the group.com/ . For each interface configured for hot standby.wordpress. its state changes do not affect the hot standby priority of the configured device. C. C. D. D. When a tracked interface fails.com/en/US/docs/switches/lan/catalyst3550/software/release/12. 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. you can configure a separate list of interfaces to be tracked. the hot standby priority on the device on which tracking has been configured decreases by 10.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.1_19_ea1/configuration/guide/swhsrp. B.html QUESTION 123 What is the maximum number of virtual MAC addresses that GLBP allows per group? A.Reference: http://cciethebeginning. 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.

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

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

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

0. If the interface MAC address is different from the one reported in the error message. In order to resolve this issue. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.shtml#dr QUESTION 129 Ferris Plastics.0 15.255.com/ .0. Currently all interfaces are up. Using the running configurations and show commands. Troubleshooting has identified several issues. with an enterprise network (access. Inc. DSW1 – primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 – primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device.255. you have been asked to investigate and respond to the following question. B. then some other device with a MAC address reports this error message. D.255. Verify the spanning-tree topology and check if there is any layer2 loop.0. If the MAC address of the interface is the same as the one reported in the error message.102 and User Datagram Protocol (UDP) port 3222 (source and destination). 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. is a medium sized company.Which option describes the reason for this message in a GLBP configuration? A. C. http://www.exam. permit the Multicast address by permit 224. When configuring the multicast boundary command. Reference: http://www. unless GigabitEthernet1/0/1 on backup device has also failed. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues. The distribution switches are configured to use HSRP to provide a high availability solution. issue the show interface command to verify the MAC address of the interface.com/en/US/products/hw/switches/ps708/products_configuration_example09186a00807d2520.0. then it indicates that this router is receiving its own hello packets sent.cisco.

exam.com/ .http://www.

com/ .exam.http://www.

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

with an enterprise network (access. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.QUESTION 130 Ferris Plastics. unless GigabitEthernet1/0/1 on backup device has also failed. Troubleshooting has identified several issues. The distribution switches are configured to use HSRP to provide a high availability solution. Inc. http://www. is a medium sized company. you have been asked to investigate and respond to the following question. Currently all interfaces are up. 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. Using the running configurations and show commands.com/ .

com/ .http://www.exam.

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

QUESTION 131 Ferris Plastics. with an enterprise network (access.exam. http://www. 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.com/ . Because 200 – 11 = 189 < 190 (priority of Vlan102 on DS2). Priority value is 200. we should decrement value in the track command from 11 to 18. Inc. 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. Troubleshooting has identified several issues. you have been asked to investigate and respond to the following question. unless GigabitEthernet1/0/1 on backup device has also failed. is a medium sized company.Use “show run” command to show. Currently all interfaces are up. The left Vlan102 is console1 of DS1.

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

Troubleshooting has identified several issues. with an enterprise network (access. The distribution switches are configured to use HSRP to provide a high availability solution. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. 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. is a medium sized company. you have been asked to investigate and respond to the following question.com/ . http://www.exam. unless GigabitEthernet1/0/1 on backup device has also failed. Currently all interfaces are up. Inc.QUESTION 132 Ferris Plastics.

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exam.http://www.com/ .

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

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

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

com/ . http://www.exam. They have questions about how these two devices will perform in the event of a device failure.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.

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com/ .exam.http://www.

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

They have questions about how these two devices will perform in the event of a device failure.exam.com/ . http://www.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.

com/ .http://www.exam.

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

They have questions about how these two devices will perform in the event of a device failure.com/ . when it comes back up. 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. the standby 1 track decrement command will lower the priority from 130 to 90.Here is the HSRP configuration seen on R1: Here.exam. when the Ethernet 0/0 interface goes down. http://www. it will then increment it by 40 back to 130 for HSRP group 1.

exam.http://www.com/ .

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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:

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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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http://www.com/ .exam.

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B. C. F.0000.What is the virtual mac-address of HSRP group 1? A.exam. D.0010 0000.ac01 4000.0010 Correct Answer: B Section: Infrastructure Services Explanation http://www. 0000.0c07.0c07.0000.0c07.ac02 0000.com/ .ac02 4000. E.0000.ac01 4000.

Explanation/Reference: Explanation: Issuing the “show standby” command on either router shows us that the virtual MAC used by HSRP group 1 is 4000.exam.com/ .0010 as shown below: http://www.0000.

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

exam. The local switch is overloaded with the amount of sourced traffic that must be replicated to the remote switch. F. traffic is not being replicated to the remote switch. C. G. The local RSPAN switch is replicating only Rx traffic to the remote switch. D. Which type of misconfiguration is a cause? A.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. E. The local and remote RSPAN switches are configured using different session IDs.) A. Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: http://www. D. however. 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. C. B. The RSPAN designated VLAN is missing the remote span command.com/ . B.

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

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

D. B. C. BPDU filtering http://www.Explanation Explanation/Reference: QUESTION 146 When SDM templates are configured. 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. 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. which action must be performed for the configuration to take effect? A. A sticky MAC address ages out of the MAC address table after 600 seconds.exam. D.com/ . C. A sticky MAC address is retained when the switch reboots. A sticky MAC address can be a unicast or multicast address. A sticky MAC address is lost when the switch reboots. B.

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

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.exam. but they are reassigned to the default VLAN. C. C. E. They go down. B. D. B.A. They remain up.com/ . Which state are these interfaces in after the VLAN is deleted? A. F. They remain up. D. 802.1Q trunking PortFast QoS private VLANs http://www. D. B. but they are reassigned to the native VLAN. C. but they are reassigned to the default VLAN. They go down until they are reassigned to a VLAN. Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 151 Which feature is automatically configured when an administrator enables a voice VLAN? A. and then the VLAN is deleted.

It can cause routing loops. B.exam. Which version of VTP supports these extended VLANs? A. B. C. D. version 1 version 2 version 3 VTP does not recognize extended VLANs. C. 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.com/ .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. It can cause a network-wide VLAN configuration change if the revision number on the new switch is lower. It can cause a network-wide VLAN configuration change if the revision number on the new switch is higher. It can cause network access ports to go into err-disabled state. Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 154 http://www. D.

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

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

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

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

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

D. SPAN session 2 only monitors egress traffic exiting port FastEthernet 0/14.Which statement about the SPAN and RSPAN configuration on SW1 is true? A. 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. SPAN session 2 monitors all traffic entering and exiting port FastEthernet 0/15.exam.com/ . RSPAN session 1 is incompletely configured for monitoring. DHCP snooping database C. VLAN database B. spanning trees http://www. B. RSPAN session 1 monitors activity on VLAN 50 of a remote switch. C.

B. 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.com/ .exam. C. D. 1000 bindings 2000 bindings 5000 bindings 8000 bindings Correct Answer: D Section: Mix QUESTIONS Explanation Explanation/Reference: http://www.D.