300-115.examcollection.premium.exam.

164q
Number: 300-115
Passing Score: 800
Time Limit: 120 min
File Version: 9.2

300-115
Implementing Cisco IP Switched Networks
Version 9.2
Sections
1. Layer 2 Technologies
2. Infrastructure Security
3. Infrastructure Services
4. Mix QUESTIONS

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:
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. lists the events that occur
when the switch stack compares the provisioned configuration with the provisioned switch.

This mechanism restores dual path flow when the timing mechanisms detect renewed activity on the cable.html QUESTION 4 Refer to the exhibit. Cisco StackWise Technology Resilient Cabling Reference: http://www.cisco. C. Subsecond timing mechanisms detect traffic problems and immediately institute failover.html QUESTION 3 What percentage of bandwidth is reduced when a stack cable is broken? A.cisco. D.switches/prod_white_paper09186a00801b096a.2_55_se/configuration/guide/3750xscg/swstack.com/c/en/us/products/collateral/switches/catalyst-3750-series. switch1 channel-group 1 mode on switch2 channel-group 1 mode auto D. Figure 3. as shown in Figure 3. B. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode passive C.Reference: http://www. A break in any one of the cables will result in the stack bandwidth being reduced to half of its full capacity. switch1 channel-group 1 mode active switch2 channel-group 1 mode auto B.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12. E. 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. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode auto Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The different etherchannel modes are described in the table below: . Which set of configurations will result in all ports on both switches successfully bundling into an EtherChannel? A.

html#wp3 875419997 QUESTION 6 Refer to the exhibit. If a VLAN is a source. You can use the monitor session session_number filter vlan vlan-id command to limit SPAN traffic on trunk source ports to only the specified VLANs.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/network_m anagement/command_reference/b_nm_3se_3850_cr/ b_nm_3se_3850_cr_chapter_010. D. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: To start a new flow-based SPAN (FSPAN) session or flow-based RSPAN (FRSPAN) source or destination session. Reference: http://www. You select a series or range of VLANs by using the [ .html QUESTION 5 Refer to the exhibit. If you specify a series of VLANs. You can monitor traffic on a single VLAN or on a series or range of ports or VLANs. How can the traffic that is mirrored out the GigabitEthernet0/48 port be limited to only traffic that is received or transmitted in VLAN 10 on the GigabitEthernet0/1 port? A. An interface in the auto mode cannot form an EtherChannel with another interface that is also in the auto mode because neither interface starts PAgP negotiation. For example: • An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode. By default. a VLAN cannot become a source. If VLAN filtering is configured. An interface in the on mode that is added to a port channel is forced to have the same characteristics as the already existing on mode interfaces in the channel. you must enter a space before and after the comma. Change the monitor session source to VLAN 10 instead of the physical interface. Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible.cisco. You can have a total of 66 SPAN and RSPAN sessions on a switch or switch stack. for Layer 2 EtherChannels. Apply the monitor session filter globally to allow only traffic from VLAN 10. or to limit (filter) SPAN source traffic to specific VLANs.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-1_13_ea1/configuration/guide/3550scg/swethchl. C. VLAN monitoring and VLAN filtering are mutually exclusive. VLAN filtering refers to analyzing network traffic on a selected set of VLANs on trunk source ports. . Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10. • An interface in the auto mode can form an EtherChannel with another interface in the desirable mode.cisco. Usage Guidelines You can set a combined maximum of two local SPAN sessions and RSPAN source sessions. VLAN filtering cannot be enabled. If you specify a range of VLANs. use the monitor session filter global configuration command. you must enter a space before and after the hyphen ( -). B. | -] options.Both the auto and desirable PAgP modes allow interfaces to negotiate with partner interfaces to determine if they can form an EtherChannel based on criteria such as interface speed and. all VLANs are monitored on trunk source ports. Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10. Reference: http://www. trunking state and VLAN numbers.

Why is the EtherChannel bundle not working? A. and the other is using desirable.A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. The switches are using mismatched EtherChannel negotiation modes. B. and destination ports on different switches (or different switch stacks). Each RSPAN source switch must have either ports or VLANs as RSPAN sources. while Switch B is configured with channel-group 1 mode desirable. RSPAN supports source ports. E. This . D. which is a PAGP mode. source VLANs.) A. LACP priority must be configured on both switches. enabling remote monitoring of multiple switches across your network. Switch A is configured with channel-group 1 mode active.html QUESTION 7 After an EtherChannel is configured between two Cisco switches.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12. The switch ports are not configured in trunking mode.cisco. The RSPAN traffic from the source ports or VLANs is copied into the RSPAN VLAN and forwarded over trunk ports carrying the RSPAN VLAN to a destination session monitoring the RSPAN VLAN. D. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Here we have a situation where one switch is using active mode. The channel group identifier must be different for Switch A and Switch B. The destination is always a physical port Reference: http://www. Here is a summary of the various etherchannel modes: Passive Places a port into a passive negotiating state in which the port responds to LACP packets that it receives. C. which is an LACP mode. You can not mix the LACP and PAGP protocols to form an etherchannel. B. A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination A remote SPAN VLAN on the distribution and access layer switch A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination A monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination A monitor session on the distribution switch with a physical interface as the source and a physical interface as the destination Correct Answer: BCD Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: You can analyze network traffic passing through ports or VLANs by using SPAN or RSPAN to send a copy of the traffic to another port on the switch or on another switch that has been connected to a network analyzer or other monitoring or security device. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three. but does not start LACP packet negotiation. F. interface port channel 1 is in the down/down state. C. The traffic for each RSPAN session is carried over a user-specified RSPAN VLAN that is dedicated for that RSPAN session in all participating switches. SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a destination port for analysis.2_55_se/configuration/guide/3750xscg/swspan.

2_55_se/configuration/guide/scg_2960/swethchl. Use link-state tracking to allow for improved load balancing of traffic upon link failure to the server. B. C. 39. For example. C. B. capabilities. Reference: http://www. Reference: http://www.html QUESTION 8 An EtherChannel bundle has been established between a Cisco switch and a corporate web server. Enable Cisco Express Forwarding to allow for more effective traffic sharing over the EtherChannel bundle. a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible. since all traffic is going to the same web server). and 52 is replicated to the SPAN destination port.com/c/en/us/td/docs/switches/lan/catalyst4500/12. 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. Filtering a trunked SPAN port effectively disables SPAN operations for all VLANs. CDP can be used to determine the physical topology. What should be done on the Cisco switch to allow for better EtherChannel utilization to the corporate web server? A. D. B. Traffic from VLANs 1 to 8. C. This example shows how to monitor VLANs 1 through 5 and VLAN 9 when the SPAN source is a trunk interface: Switch(config)# monitor session 2 filter vlan 1 5 . principally wired Ethernet.cisco. and either source mode.html/index. Use the option that provides the greatest variety in your configuration. Cisco Express Forwarding is enabled locally. but not necessarily the logical topology. E. use of the destination MAC address results in the choice of the same link in the channel each time. destination mode. B. All VLAN traffic is sent to the SPAN destination interface. Even though multiple routing neighbors can be formed over a layer 2 network. D. LLDP performs functions similar to several proprietary protocols. D. or Layer 4 port numbers. . Correct Answer: E Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: EtherChannel load balancing can use MAC addresses.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4.html QUESTION 9 Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. such as the Cisco Discovery Protocol (CDP). 52 What is the result of the implemented command? A. Which vendor-neutral protocol could be used to resolve this issue? A. only the physical port that it connects to will be seen as a CDP neighbor. but it has several routing neighbor relationships. 39. Disable spanning tree on all interfaces that are participating in the EtherChannel bundle. Traffic from VLAN 4 is not sent to the SPAN destination interface. 9 Reference: http://www.setting minimizes the transmission of LACP packets. Use of source addresses or IP addresses can result in a better load balance. The trunk's native VLAN must be changed to something other than VLAN 1. Adjust the EtherChannel load-balancing method based on source IP addresses.2/25ew/configuration/guide/conf/span.cisco. if the traffic on a channel only goes to a single MAC address (which is the case in this example. IP addresses. E.cisco. Cisco Discovery Protocol advertisements are inconsistent between the local and remote devices. Adjust the EtherChannel load-balancing method based on destination IP addresses. QUESTION 11 After the implementation of several different types of switches from different vendors. What would cause the output to show only the single neighbor? A. C.html#wp1066836 QUESTION 10 A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided. Local Area Mobility Link Layer Discovery Protocol NetFlow Directed Response Protocol 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.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12. The mode you select applies to all EtherChannels that you configure on the switch. The network administrator noticed that only one of the EtherChannel links is being utilized to reach the web server. The routers are connected via a Layer 2 switch. The engineer notices only a single neighbor that uses Cisco Discovery Protocol. This command is configured globally: monitor session 2 filter vlan 1 8. or both. and neighbors on an IEEE 802 local area network. Correct Answer: E Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The "monitor session filter" command is used to specify which VLANS are to be port mirrored using SPAN. IP routing is disabled on neighboring devices. D. then each router will only have the single switch port that it connects to as its neighbor.

• Make sure that the VLANs are active in all the devices. If you convert from VTP version 3 to VTP version 2. B.Reference: http://en. What should be configured for extended VLANs? A. but transparent switches do forward VTP advertisements that they receive out their trunk ports in VTP Version 2. D. A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements. D. What is the most probable cause of this behavior? A. Make sure that if EtherChannels are created between two switches. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP transparent switches do not participate in VTP. • Make sure that no password is set between the server and client. CISCO and cisco are two different domain names.org/wiki/Link_Layer_Discovery_Protocol QUESTION 12 Several new switches have been added to the existing network as VTP clients. What must be done to fix this? A. Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred. make sure that the password is the same on both sides. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name.shtml QUESTION 15 Refer to the exhibit.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. C.1SY/config_guide/sup2T/vtp . but Switch B does not receive any VLAN information. Extended VLANs will not propagate to different IOS versions when extended VLANs are in use. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking.com/en/US/docs/switches/lan/catalyst6500/ios/15. VTP version 3 supports extended-range VLANs (VLAN numbers 1006 to 4094). while Switch C is configured with a trunk port to Switch B.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52. B. Enable VTP version 3. and C are trunked together and have been properly configured for VTP. However. All of the new switches have been configured with the same VTP domain.shtml QUESTION 13 After implementing VTP. C. the extended VLANs are not being propagated to other VTP switches. • One of the switches must be the VTP server in a VTP domain.pdf QUESTION 14 Refer to the exhibit. C. B. • The VTP domain name must match and it is case sensitive. The VTP revision number of the Switch B is higher than that of Switch A. Switch B is configured in transparent mode. Provision one of the new switches to be the VTP server and duplicate information from the existing network. Reference: http://www. You must configure extended-range VLANs manually on each network device. Switch B is configured with an access port to Switch A. Switch A. The trunk between Switch A and Switch B is misconfigured. password. Ensure that all switches run the same Cisco IOS version. and version. 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. 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. Reference: http://www. the VLANs in the range 1006 to 4094 are removed from VTP control.cisco.cisco. D. .range VLANs (VLAN numbers 1006 to 4094). Verify these items if switches that run VTP fail to exchange VLAN information: • VTP information only passes through a trunk port. If any password is set. There are several reasons why the VLAN information can fail to be exchanged. All VLAN changes must be done on this switch in order to have them propagated to the VTP clients. Switch C receives VLAN information from the VTP server Switch A. Configure a differe"t na"ive VLAN on all new switches that are configured as VTP clients. VTP allows a consistent view of the switched network across all switches. which supports extended VLAN propagation.wikipedia.cisco. Reference: http://www. VTP authentication is required when using extended VLANs because of their ability to cause network instability. VLANs are not passing from the VTP server (existing network) to the VTP clients. B. VTP does not support extended VLANs and should be manually added to all switches. only Layer 2 EtherChannels propagate VLAN information.

A backup/redundant path to a segment where another bridge port already connects. 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. is that VTP pruning has been configured. What would cause this issue? A. a network administrator can manually disable a port Reference: http://www. C. Reference: http://www. and unknown unicast traffic across all trunk links within a VTP domain even though receiving switches might discard them. the network engineer notices that the port roles that were once "blocking" are now defined as "alternate" and "backup. a switch floods broadcast. To have two links to the same collision domain. IEEE 802. The alternative port moves to the forwarding state if there is a failure on the designated port for the segment.cisco. most links operate in full-duplex mode and are treated as point-to-point links by RSTP.html QUESTION 18 Which technique automatically limits VLAN traffic to only the switches that require it? A. The backup port applies only when a single switch has two links to the same segment (collision domain).cisco. The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco Catalyst switches. * Disabled port .A forwarding port for every LAN segment * Alternate port . while a half-duplex port is considered as a shared port by default. This path is different than using the root port. B. the switch must be attached to a hub. In switched networks today. 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.A best alternate path to the root bridge.com/c/en/us/support/docs/lan-switching/spanning-tree.protocol/24062-146. The switch does not have the processing power to ensure rapid transition for all ports. D.html QUESTION 17 An administrator recently configured all ports for rapid transition using PortFast.1D STP. The best explanation for why switch C is not seeing traffic from only some of the VLANs. STP is unable to achieve rapid transition for trunk links. A VTP authentication mismatch occurred between Switch A and Switch B.protocol/24062-146. access lists DTP in nonegotiate VTP pruning PBR Correct Answer: C .com/c/en/us/support/docs/lan-switching/spanning-tree. Without VTP pruning. What is the reason for this? A. The VTP revision number of Switch B is higher than that of Switch A. The link type is automatically derived from the duplex mode of a port. After testing. VTP pruning blocks unneeded flooded traffic to VLANs on trunk ports that are included in the pruning-eligible list. QUESTION 16 After the recent upgrade of the switching infrastructure. RSTP has been enabled per interface and not globally. VTP pruning is disabled by default." What is the reason for this change? A. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. B. D. C. B. Switch B has all VLANs. * Backup port . D. A port that operates in full-duplex is assumed to be point-to-point. C. B. not on trunk links.point links. VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface that is connected to Switch C.Switch A. The administrator has defined the switch as the root in the STP domain. The new switches are using RSTP instead of legacy IEEE 802. These ports are allowed to immediately enter the forwarding state rather than passively wait for the network to converge. it has been determined that several ports are not transitioning as they should.1D STP and PortFast have been configured by default on all newly implemented Cisco Catalyst switches. RSTP bridge port roles: * Root port .A forwarding port that is the closest to the root bridge in terms of path cost * Designated port . 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. C. and C are trunked together and have been properly configured for VTP. D. multicast. The trunk between Switch A and Switch B is misconfigured. This automatic link type setting can be overridden by explicit configuration.Not strictly part of STP. but Switch C is not receiving traffic from certain VLANs. B. This makes them candidates for rapid transition to the forwarding state.

C. The VLAN template disables routing in hardware.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. The SDM VLAN template causes the MAC address-table to overflow.Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic. the link did not recover. unknown.html#wp1020444 QUESTION 19 What effect does the mac address-table aging-time 180 command have on the MAC address. and flooded unicast packets to only the switches that require it. This is how long a dynamic MAC address will remain in the CAM table. this can be done by issuing shutdown followed by no shutdown on the interface. D. and (ideally) correct the issue. The idea behind requiring administrative action is so that a human engineer can intercede.table? A. By default. Reference: http://www. B. B.cisco. some configurations may be prone to accidental violations. D. The MAC address-table will be flushed every 3 minutes. a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber.net/blog/2009/sep/14/errdisable-autorecovery/ QUESTION 21 A network engineer deployed a switch that operates the LAN base feature set and decides to use the SDM VLAN template. 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. The SDM template is causing the CPU of the switch to spike during peak working hours. However. multicast. the link was placed into a non-forwarding state due to a fault with UDLD. by removing an unapproved device) without the need for administrative intervention. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: SDM Template Notes: . VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices. D. What solution allows the network switch to automatically recover from such an issue? A.cisco. macros errdisable autorecovery IP Event Dampening command aliases Bidirectional Forwarding Detection Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: There are a number of events which can disable a link on a Catalyst switch. or a broadcast storm. assess. As designed. The VLAN receives additional frames from neighboring switches. This gives the offending issue a chance to be cleared by the user (for example.2SX/configuration/guide/book/vtp.html#wp1126206 QUESTION 20 While working in the core network building. We can configure the switch to automatically re-enable any error-disabled interfaces after a specified timeout period. E. and a steady recurrence of these can amount to a huge time sink for the administrative staff. VTP pruning is disabled. After the damaged cable was replaced. manual intervention by an administrator is necessary to restore the interface to working order. The default timeout period will be 360 seconds. What is the root cause of this issue? A. perform this task: 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. ARP requests will be processed less frequently by the switch. By default. B. E. UDLD failure. To configure the aging time for all MAC addresses.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/MACAddress. The switch needs to be rebooted before the SDM template takes effect. The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes. such as broadcast. Reference: http://packetlife. such as the detection of a loopback. This is where errdisable autorecovery can be of great assistance. C. C.

Reference: http://www. What is the result of the configuration? A. the network administrator notices that not all traffic is being replicated to the management server. B.html#wp1040905 QUESTION 23 Refer to the exhibit. The EtherChannels would form.cisco. A port-channel interface (an EtherChannel) can be a SPAN source.com/c/en/us/support/docs/switches/catalyst-3750-series.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. as opposed to the original access control entries (ACEs) configured by the user.2SX/configuration/guide/book/span. The port channel can be used as a SPAN source. 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. generate the number of TCAM entries listed for security and QoS ACEs. SPAN can monitor one or more source ports or EtherChannels in a single SPAN session. PagP. B. The EtherChannels would not form because the load-balancing method must match on the devices. although each switch involved in the etherchannel can have non matching parameters for load balancing. D. There is no way to edit template category individual values. D. all channels (manually configured. Choosing the VLAN template will actually disable routing (number of entry for unicast or multicast route is zero) in hardware. but not on the associated physical ports. or LACP) use the same load-balancing. RSPAN must be used to capture EtherChannel bidirectional traffic. The first eight lines (up to Security ACEs) represent approximate hardware boundaries set when a template is used. You can configure ports or EtherChannels in any VLAN as SPAN sources. As a result. Reference: http://www. The table below summarizes the results for LACP channel establishment based on the configuration of each side of a link: Load balancing can only be configured globally. You can configure both Layer 2 and Layer 3 ports and EtherChannels as SPAN sources. After configuring SPAN to monitor this port. all processing overflow is sent to the CPU which can have a major impact on the performance of the switch.switches/44921-swdatabase-3750ss-44921. The EtherChannels would form and function properly even though the load-balancing and EtherChannel modes do not match. C.com/c/en/us/td/docs/switches/lan/catalyst4500/12. but not a destination. What is a cause for this issue? A. . The EtherChannels would form and both devices would use the dst-ip load-balancing method because Switch1 is configured with EtherChannel mode active. but not a destination. This is true for the switch globally. If the boundary is exceeded. Reference: http://www. but network loops would occur because the load-balancing methods do not match. What is the result of the configuration? A. C. VLAN filters are required to ensure traffic mirrors effectively. Trunk ports or EtherChannels can be configured as sources and mixed with nontrunk 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. The storm control settings will appear on the EtherChannel. SPAN encapsulation replication must be enabled to capture EtherChannel destination traffic. The ACL merge algorithm.cisco.All templates are predefined.html QUESTION 22 An access switch has been configured with an EtherChannel port.html#wp1020804 QUESTION 24 A network engineer tries to configure storm control on an EtherChannel bundle.cisco.2/54sg/configuration/guide/config/channel. The switch reload is required to use a new SDM template.

If you configure Storm Control on only some of the ports. Reference: http://www. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: With UDLD aggressive mode enabled. and not at the physical interface level.com/c/en/us/td/docs/switches/lan/catalyst4500/12. D. UDLD port is configured in aggressive mode. This enables UDLD in normal mode. B. combining for an active 1400-Gbps switching capacity per VSS. any configuration that you apply to the port-channel interface affects the EtherChannel.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. In a VSS. The bidirectional status of "unknown" indicates that the port will go into the disabled state because it stopped receiving UDLD packets from its neighbor. C. For example. Therefore. and scaling system bandwidth capacity to 1. but will only be present on the physical interfaces. you cannot configure Storm Control on some of the members of an EtherChannel. C. UDLD tries to reestablish the connection with the neighbor. B.cisco. an engineer notices that the. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: After you configure an EtherChannel. The configuration will be rejected because storm control is not supported for EtherChannel. when a port on a bidirectional link that has a UDLD neighbor relationship established stops receiving UDLD packets.B.cisco. you should configure Storm Control at the EtherChannel Interface level. Storm Control is an exception to this rule. The settings will be applied to the EtherChannel bundle and all associated physical interfaces. forward traffic simultaneously using both supervisors forward traffic based on Cisco Express Forwarding provide automatic failover to back up supervisor in VSS mode 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.net/blog/2011/mar/7/udld/ QUESTION 28 Pilot testing of the new switching infrastructure finds that when the root port is lost. B. The storm control configuration will be accepted.over-blog. The port will remain operational during this time. UDLD is disabled on all interfaces. UDLD moved into aggressive mode after inconsistent acknowledgements were detected. any configuration that you apply to the physical interfaces affects only the interface where you apply the configuration. We can enable UDLD globally on the device. a Network Administrator noticed that one port stops receiving UDLD packets. After eight failed retries. Normal UDLD operations that prevent traffic loops. The UDLD port is placed in the "unknown" state for 5 seconds until the next UDLD packet is received on the interface. the status will transition to bidirectional.2SX/configuration/guide/book/udld. Reference: http://ciscorouterswitch. the port is disabled. D. Reference: http://packetlife.124536783. When UDLD is finally enabled on the other end. B. increasing operational efficiency. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: By default. VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE." Which statement describes what this indicates about the status of the port? A. so when UDLD is first enabled and does not detect a neighbor the link state is considered unknown.2/31sg/configuration/guide/conf/channel. or individually on specific interfaces with the command udld port. This port continues to reestablish until after eight failed retries. Both chassis are kept in sync with the inter-chassis Stateful Switchover (SSO) mechanism along with Nonstop Forwarding (NSF) to provide nonstop communication even in the event of failure of one of the member supervisor engines or chassis. Which spanning-tree technology is used to accomplish backup root port selection? A. UDLD timers are inconsistent. UDLD is enabled globally. C. D. PVST+ PortFast BackboneFast UplinkFast . Switches would operate as a single logical virtual switch called a virtual switching system 1440 (VSS1440). those ports will be dropped from the EtherChannel interface (put in suspended state). STP immediately replaces the root port with an alternative root port.html QUESTION 25 What is the function of NSF? A. C. Only one of the virtual switch members has the active control plane. Which option describes what causes the port to go into the errdisable state? A. D. C. D.html QUESTION 26 After UDLD is implemented. Reference: http://www. which is not necessarily an error condition. Storm Control must be configured on all or none of the ports.com/article-cisco-catalyst-6500-series-vss-1440. the data plane and switch fabric with capacity of 720 Gbps of supervisor engine in each chassis are active at the same time on both chassis. The port then transitions into the errdisable state.4 Tbps.html QUESTION 27 After reviewing UDLD status on switch ports. The port is fully operational and no known issues are detected. It would be prohibitively difficult to coordinate the configuration of UDLD on both ends of a link at the same time. boosting nonstop communications.

If a network segment in the spanning tree fails and a redundant path exists. You configure the load balancing and forwarding method with use of the port-channel load-balance {dst-ip | dst-mac | src-dst-ip | src-dst-mac | src-ip | src-mac} global configuration command. The spanning-tree port priority value represents the location of a port in the network topology and how well it is located to pass traffic. or both source and destination addresses. 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. The uplink group provides an alternate path in case the currently forwarding link fails. C. The root port transitions to the forwarding state immediately without going through the listening and learning states. The mode applies to all EtherChannels that are configured on the switch.cisco. The interface is configured as the target of the SPAN session.cisco.2_55_se/configuration/guide/3750xscg/swstp. By enabling UplinkFast with the spanningtree uplinkfast global configuration command. Which action must be done to apply a new load balancing method? A. D. Upgrade the PFC to support the latest load balancing methods. The path cost value represents the media speed. Configure the new load balancing method using port-channel load-balance. EtherChannel load balancing can use MAC addresses or IP addresses. C. Loop Guard F. There is a layer 1 physical issue. UDLD Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: I f a switch loses connectivity. What is causing the line protocol on this interface to be shown as down? A. UplinkFast provides fast convergence after a direct link failure and achieves load balancing between redundant Layer 2 links using uplink groups. E. When two ports on a switch are part of a loop.2_55_se/configuration/guide/scg_2960/swstpopt.cisco. The interface is configured as the source of the SPAN session. 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. BPDUs contain information about the sending switch and its ports. including switch and MAC addresses.E.html QUESTION 31 Refer to the exhibit. There is a speed mismatch on the interface. .com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12. A network engineer investigates a recent network failure and notices that one of the interfaces on the switch is still down. switch priority. Reference: http://www. Adjust the switch SDM back to "default". An uplink group is a set of Layer 2 interfaces (per VLAN). B. C. There is a duplex mismatch on the interface.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12. the spanningtree algorithm recalculates the spanning-tree topology and activates the standby path. called bridge protocol data units (BPDUs). D. except for self-looping ports. 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. Reference: http://www. it begins using the alternate paths as soon as the spanning tree selects a new root port.html QUESTION 30 A network engineer must set the load balance method on an existing port channel. and path cost. only one of which is forwarding at any given time. an uplink group consists of the root port (which is forwarding) and a set of blocked ports. Switches send and receive spanning-tree frames. B. E. Which two elements are used to accomplish this? (Choose two. Specifically. 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/en/us/support/docs/lan-switching/etherchannel/12023-4.html QUESTION 29 A network engineer must adjust the STP interface attributes to influence root port selection. The switches do not forward these frames but use them to construct a loop-free path.) A. D. B. 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. source or destination addresses. Ensure that IP CEF is enabled globally to support all load balancing methods. port priority. Reference: http://www. as it would with the normal spanning-tree procedures. at regular intervals.

To restrict the traffic a trunk carries. the state of the destination port is up/down by design. PPP DTP ISL HDLC DLCI DOT1Q Correct Answer: CF Section: Layer 2 Technologies Explanation . This version is mainly used for backward compatibility. This is the normal operational state for SPAN destinations. and is enabled by default. C.) A. use the "switchport trunk allowed vlan remove vlan-list" interface configuration command to remove specific VLANs from the allowed list. 1 to 4094. are allowed on each trunk. configure "switchport nonegotiate. Reference: http://www. You must manually configure the neighboring interface as a trunk interface to establish a trunk link. All VLAN IDs.com/articles/article. Which two actions can prevent interface trunking? (Choose two. preventing traffic from those VLANs from passing over the trunk. VTP pruning transparent bridging trunk allowed VLANs VLAN access-list L2P tunneling Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: By default. To disable DTP. C. D. However. CDP Version 2 -. Disable DTP on a per interface basis. D.This is the most recent version of CDP which has enhanced features such as rapid reporting mechanism. E.cisco. B. E. which is used to track down errors and minimize costly downtime.com/CiscoSB/GetArticle.1_13_ea1/confi guration/guide/swvlan.xml&pid=2&converted=0 QUESTION 33 Which technique allows specific VLANs to be strictly permitted by the administrator? A. Reference: http://sbkb.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c61 2. B. Configure trunk and access interfaces manually.aspx? docid=0ed03cbac49b446ab390a657917d817c_Cisco_Discovery_Protocol_CDP__Properties_Set tings_on_Sx500_S. E. Which option must be enabled to allow for enhanced reporting mechanisms using Cisco Discovery Protocol? A.cisco.Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: With the SAPN destination port. C.com/en/US/docs/switches/lan/catalyst3550/software/release/12.This is the first version of CDP which was used for the discovery of Cisco devices in the network." This prevents the interface from generating DTP frames. 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. but may be disabled. the IT manager has prohibited users from dynamically establishing trunks with their associated upstream switch. it is found that rapid error tracking is not currently enabled. otherwise the link will be a non-trunking link.ciscopress. It allows you to track instances even if the native VLAN ID or port duplex states do not match between connecting devices. Reference: http://www. Enable switchport block on access ports. This is the default version on all switches.) A. B. C. Reference: http://www.html QUESTION 34 For security reasons. D.shtml QUESTION 32 While doing network discovery using Cisco Discovery Protocol.asp?p=2181837&seqNum=8 QUESTION 35 Which two protocols can be automatically negotiated between switches for trunking? (Choose two. F. a trunk port sends traffic to and receives traffic from all VLANs. You can use this command only when the interface switchport mode is access or trunk. you can remove VLANs from the allowed list. 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.cisco. DTP causes increased traffic. D. B. Apply BPDU guard and BPDU filter. 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 -.

but it does not appear in plain text in the configuration. You must reenter the password if you enter a takeover command in the domain. You would also need to . B. VTP pruning removed all unused VLANs. VTP pruning--Avoid this method if the goal is to reduce the number of STP instances. After each update to the VTP server. Instead.57313/Dynamic%20Trunking%20Protocol.2_52_se/config uration/guide/swvtp.com/servlet/JiveServlet/previewBody/14792-102-1. Create a Layer 3 transit VLAN to segment the traffic between the sites. Since the question asked for the choice that is an enhancement to the STP design. C. After verifying all VTP settings.html#wp1316856 QUESTION 38 A network engineer is extending a LAN segment between two geographically separated data centers. B. 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.30 is issued. the network engineer notices that the new switch is not receiving the list of VLANs from the server. After the command switchport trunk allowed vlan 10. the key associated with the password is saved in hexadecimal format in the running configuration. it takes up to 4 hours propagate. 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. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The "switchport trunk allowed vlan" command will only allow the specified VLANs. C.com/en/US/docs/switches/lan/catalyst3560/software/release/12. C. you can directly configure the password secret key. B.20. Reference: http://www. D. and 30) are allowed to traverse the switch trunk interface. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing the extended LAN segment? A.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. Support for extended range VLAN (VLANs 1006 to 4094) database propagation. ISL was unable to encapsulate more than the already permitted VLANs across the trunk. VTP. Reload the new switch. C.cisco. The command effectively removed all other working VLANs and replaced them with the new VLANs.cisco.PDF QUESTION 36 A network is running VTPv2. VTP pruning is the best choice. the secret key from the password string is saved in the VLAN database file. What is the problem? A. Reference: https://learningnetwork. B. Use VTP pruning on the trunk interfaces. D. QUESTION 37 After configuring new data VLANs 1020 through 1030 on the VTP server. Verify connected trunk ports. Instead. and it avoids the use of the spanning tree. and overwrite any others that were previously defined.1Q or ISL trunking encapsulation. The VTP version number must be set to version 3. 20. Allowing additional VLANs across the trunk introduced a loop in the network. a network engineer notices that none of the VTP clients are receiving the updates. Configure manual trunk pruning between the two locations. Reload the VTP server.Explanation/Reference: Explanation: Switches such as the Catalyst 3550 that are capable of either 802. VTP must be stopped and restarted on the server. D. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP version 3 supports these features that are not supported in version 1 or version 2: Enhanced authentication--You can configure the authentication as hidden or secret. VTP versions 1 and 2 propagate only VLANs 1 to 1005. The first thing that should be done is to verify that the trunk ports are connected and up. E. Therefore. D. VTP-pruned VLANs do not reduce the number of spanning tree port instances. Restart the VTP process on the new switch. you cannot convert from VTP version 3 to version 1 or 2.pruned VLANs on a trunk are still part of the spanning tree. If extended VLANs are configured. When hidden. When you enter the secret keyword.shtml QUESTION 39 The network manager has requested that several new VLANs (VLAN 10. the method runs the pruned VLAN on trunks. The VTP server must be reloaded. all other existing VLANs no longer pass traffic over the trunk. Which action resolves this problem? A. What is the root cause of the problem? A. Reference: http://www.cisco. the switchport trunk encapsulation [dot1q | isl | negotiate] interface command must be used prior to the switchport mode trunk command. Modify the spanning-tree priorities to dictate the traffic flow. Another switch in the domain has a higher revision number than the server.

Which option can be configured to accomplish this? A. B.com/2012/11/difference-between-vtp-versions.html QUESTION 41 What does the command vlan dot1q tag native accomplish when configured under global configuration? A. such as the Cisco Discovery Protocol (CDP). Which spanningtree feature satisfies this requirement? A. D. all of the configured VLANs are allowed to send and receive traffic across the link. For their disaster recovery feature to operate successfully.wikipedia.blogspot.link QUESTION 40 When you design a switched network using VTPv2. B. C. issue the switchport trunk vlan-Iist interface configuration command. For Integrated Cisco IOS Software based switches. All frames within the native VLAN are tagged. C. C. It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s). C. Cisco Discovery Protocol is not supported. Reference: https://supportforums.com/document/11836/how-define-vlans-allowed-trunk. F. principally wired Ethernet. C. E. 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. how many VLANs can be used to carry user traffic? A. so the open standard protocol must be configured. VLANs 1 through 1005 are allowed on each trunk by default. 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). allowed VLAN list VTP pruning VACL L2P tunneling Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: When a trunk link is established. Which protocol does the network engineer configure on both devices to accomplish this? A. Note: The allowed VLAN list on both the ends of the trunk link should be the same. D. D. the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state. B. D.cisco. 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. QUESTION 42 A network engineer has just deployed a non-Cisco device in the network and wants to get information about it from a connected device. B. D. except when the native VLAN is set to 1. B. they require the switchport to enter a forwarding state immediately. LLDP performs functions similar to several proprietary protocols. However. Reference: http://en.com/document/11836/how-define-vlans-allowed-trunk. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The "vlan dot1q tag native" will tag all untagged frames. VLAN traffic can be removed from the allowed list. perform these steps: 1. Rapid Spanning-Tree Spanning-Tree Timers Spanning-Tree FastPort Spanning-Tree PortFast . This removes specific VLANs from the allowed list.org/wiki/Link_Layer_Discovery_Protocol QUESTION 43 A manager tells the network engineer to permit only certain VLANs across a specific trunk interface. It allows control traffic to pass using the non-default VLAN.To restrict the traffic that a trInk carries.link QUESTION 44 For client server failover purposes.cisco. including control traffic.explicitly allow the other working VLANs to this configuration command. with the defined native VLAN. Reference: http://cciememo. and neighbors on an IEEE 802 local area network. Control traffic is tagged. capabilities. This keeps traffic from the VLANs from passing over the trunk link. Only VTP version 3 supports extended VLANs (1-4095). Reference: https://supportforums.

Example configuration: Switch-C# configure terminal Switch-C(config)# interface range fa0/3 . So if the port is to be a part of the loop. 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: Reference: http://www.aspx? b=CCNP_Studies_Switching&seqNum=36 QUESTION 45 Which command does a network engineer use to verify the spanning-tree status for VLAN 10? A. B. The port still participates in STP. VLANs. enable the STP PortFast feature.informit. E. B. Which Spanning Tree Protocol should be used to reduce switch resources and managerial burdens that are associated with multiple spanning-tree instances? . C. If the switch hears a VTP advertisement it will automatically learn the VTP domain name. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: By default. which statement describes what happens when"a do"ain name is configured on one of the switches? A.net/configuring-cisco-vtp/ QUESTION 47 A network engineer is setting up a new switched network. PortFast immediately transitions the port into STP forwarding mode upon linkup.E. D.sent out every 300 seconds and every time a change occurs on the VLAN database.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2. the port eventually transitions into STP blocking mode.dionicio. Contained in a summary advertisement: VTP version Domain name Configuration revision number Time stamp MD5 encryption hash code Reference: https://rowell.cisco. All other switches with the default domain name become VTP clients. 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. and the configuration revision number. VTP summary advertisements are sent out of all ports with the new domain name. a switch will have a domain name of NULL and no password. Switches with higher revisio" num"ers does not accept the new domain name.com/library/content. The switch with the non-default domain name restores back to "null" upon reboot. C. The network is expected to grow and add many new VLANs in the future.24 Switch-C(config-if-range)# spnning-tree portfast Reference: http://www. If all switches currently have the default VTP domain name "null". D. Summary advertisements .html QUESTION 46 A new network that consists of several switches has been connected together via trunking interfaces.

B. SDM templates are configured by accessing the switch using the web interface. SDM templates are used to configure ACLs that protect networks and specific hosts from unnecessary or unwanted traffic.com/2011/05/chapter-03-implementing-spanning. connected to two Building Distribution submodule Switches D1 and D2. SDM templates are used to configure system resources in the switch to optimize support for specific features. SDM templates are used to create Layer 3 interfaces (switch virtual interfaces) to permit hosts in one VLAN to communicate with hosts in another VLAN. uses a minimum number of STP instances to match the number of physical topologies present. depending on how the switch is used in the network. VLAN access default routing Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: . Figure 3-15: VLAN Load Balancing Figure 3-15 illustrates two links and 1000 VLANs. You can select a template to provide maximum system usage for some functions. and use access template to obtain maximum ACL usage. MST. depending on how the switch is used in the network.blogspot. reducing the need for switch resources.html QUESTION 48 Which statement about the use of SDM templates in a Cisco switch is true? A. E. C. featuring an access Switch A. there are 1000 VLANs. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: You can use SDM templates to configure system resources in the switch to optimize support for specific features. B. for example.tree_19. RSTP PVST MST PVST+ RPVST+ Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Multiple Spanning Tree (MST) extends the IEEE 802.1w RST algorithm to multiple spanning trees. use the default template to balance resources. E. the switch SDM templates prioritize system resources to optimize support for certain features. Figure 3-15 shows a common network design. SDM templates are used to configure a set of ACLs that allows the users to manage the flow of traffic handled by the route processor. Reference: http://ciscodocuments. Rather than maintaining 1000 spanning trees. D.pdf QUESTION 49 Which SDM template disables routing and supports the maximum number of unicast MAC addresses? A. each switch needs to maintain only two spanning trees.cisco. C. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies. D.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12. The 1000 VLANs map to two MST instances. D.2_55_s e/configuration/guide/swsdm. Reference: 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. 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.A. on the other hand. B. In this setup. To allocate hardware resources for different usages. C.

B.To allocate ternary content addressable memory (TCAM) resources for different usages. the switch SDM templates prioritize system resources to optimize support for certain features.2_55_se/config uration/guide/swsdm. Reference: http://www. A MAC address or host moves between different switch ports. C. Reference: http://www. Routing--The routing template maximizes system resources for Ipv4 unicast routing. Default--The default template gives balance to all functions. B.cisco. D. D.com/en/US/docs/switches/lan/catalyst3560/software/release/12. C. use the mac-address-table notification mac-move command in global configuration mode. C. B.pdf QUESTION 51 In a Cisco switch. More than 64 MAC addresses are added to the content-addressable memory. 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. 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. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: mac-address-table notification mac-move To enable MAC-move notification. Default--The default template gives balance to all functions. use the no form of this command.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/M ACAddress. VLANs--The VLAN template disables routing and supports the maximum number of unicast MAC addresses (clients). 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. A new MAC address is removed from the content-addressable memory. typically required for a router or aggregator in the center of a network.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12. Mac-address-table notification mac-move [counter [syslog]] no mac-address-table notification mac-move [counter [syslog]] Syntax Description . A new MAC address is added to the content-addressable memory. when is a syslog message generated? A. It would typically be selected for a Layer 2 switch. It would typically be selected for a Layer 2 switch. D.2_55_se/config uration/guide/swsdm. To disable MAC-move notification. typically required for a router or aggregator in the center of a network. perform this task: Reference: http://www. VLANs--The VLAN template disables routing and supports the maximum number of unicast MAC addresses.html QUESTION 52 If a network engineer applies the command mac-address-table notification mac-move on a Cisco switch port. Routing--The routing template maximizes system resources for Ipv4 unicast routing. what is the default period of time after which a MAC address ages out and is discarded? A.cisco. the switch SDM templates prioritize system resources to optimize support for certain features. VLAN default access 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 50 Which SDM template is the most appropriate for a Layer 2 switch that provides connectivity to a large number of clients? A.

by default. you must reenable the ports manually.shtml QUESTION 55 Which statement about LLDP-MED is true? A. .Usage Guidelines MAC-move notification generates a syslog message whenever a MAC address or host moves between different switch ports. 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. D. The errdisable recovery command allows you to choose the type of errors that automatically reenable the ports after a specified amount of time. 30 seconds 100 seconds 300 seconds 600 seconds Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: After you fix the root problem.cisco.shtml QUESTION 54 What is the default value for the errdisable recovery interval in a Cisco switch? A. In this case. Reference: http://www.cisco.cisco.html QUESTION 53 Which option is a possible cause for an errdisabled interface? A.-------------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. Issue the shutdown command and then the no shutdown interface mode command on the associated interface in order to manually reenable the ports. cat6knative#show errdisable recovery ErrDisable Reason Timer Status ----------------. D. the timeout feature is disabled. Reference: http://www. LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices. C.com/en/US/docs/ios/lanswitch/command/reference/lsw_m1.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b. B. The show errdisable recovery command shows the default error-disable recovery state for all the possible conditions. B. the ports are still disabled if you have not configured errdisable recovery on the switch. 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. C.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.

pdf QUESTION 56 Which statement about Cisco devices learning about each other through Cisco Discovery Protocol is true? A. Each device sends periodic advertisements to a central device that builds the network topology.spravcesite. and inventory management.com/en/US/docs/switches/metro/me3400/software/release/12.cisco. B. memory errors. LLDP-MED is an extension to LLDP that operates only between network devices. Reference: http://network.2_58_se/configur ation/guide/swlldp. Reference: http://www. D.html . memory errors native VLAN IDs. C. memory errors Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Type-Length-Value fields (TLVs) are blocks of information embedded in CDP advertisements. Power over Ethernet. hardware platform port-duplex.net/subdom/network/index. 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. network policy. C. hardware platform native VLAN IDs. These multicast packets may be received by Cisco switches and other networking devices that support CDP into their connected network interface. native VLAN IDs. It specifically provides support for voice over IP (VoIP) applications and provides additional TLVs for capabilities discovery.cisco. Table 21 summarizes the TLV definitions for CDP advertisements. port-duplex.B. port-duplex. D. D. out each connected network interface. Table 21 Type-Length-Value Definitions for CDPv2 Reference: http://www. Each device sends periodic advertisements to multicast address 01:00:0C:CC:CC:CC. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Cisco devices send periodic CDP announcements to the multicast destination address 01-00-0c. LLDP-MED is an extension to LLDP that operates only between endpoint devices. hardware platform.cc-cc-cc. LLDP-MED is an extension to LLDP that operates between routers that run BGP. Each device broadcasts periodic advertisements to all of its neighbors.php?id=cdp QUESTION 57 Which option lists the information that is contained in a Cisco Discovery Protocol advertisement? A. B. C.com/en/US/docs/ios/12_2/configfun/configuration/guide/fcf015. Each device sends periodic advertisements to all IP addresses in its ARP table.

and neighbors on a local area network. LLDP does not support TLVs. C.QUESTION 58 Which option describes a limitation of LLDP? A. D. 30 seconds B. Reference: http://www. UDLD is a standardized Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. UDLD can operate in either normal or aggressive mode.com/en/US/docs/switches/lan/catalyst6500/ios/12.cisco. B.2SX/configuration/guide/udl d. LLDP can discover only Windows servers. UDLD detects the existence of unidirectional links. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Reference: http://www. B. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD.html QUESTION 60 Which option lists the modes that are available for configuring UDLD on a Cisco switch? A. C.2SX/configuration/guide/udl d.cisco. UDLD puts the affected port into the errdisabled state and alerts the user. D. LLDP cannot provide information about VTP. Reference: http://www. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to advertise their identity. normal and aggressive active and aggressive normal and active normal and passive normal and standby Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD.html QUESTION 61 What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements? A. 60 seconds .cisco. UDLD is a standardized Layer 2 protocol that enables devices to advertise their identity. D. E. LLDP can discover up to two devices per port. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. and neighbors on a local area network.com/en/US/docs/switches/lan/catalyst6500/ios/12. UDLD puts the affected port into the errdisabled state and alerts the user. UDLD detects the existence of unidirectional links. capabilities. B. C.com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd804c d46d. capabilities. When a unidirectional link is detected.html QUESTION 59 Which statement about the UDLD protocol is true? A. When a unidirectional link is detected.

when a switch is configured to use VTP versions 1 or 2? A. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP version 1 and version 2 support VLANs 1 to 1000 only. Reference: http://www. allowing up to 4. The hexadecimal values of 0x000 and 0xFFF are reserved. CDP is disabled by default and can be enabled globally with the command cdp run. Advertisements supported and configured in Cisco software are sent. the port should be configured as a trunk port. D. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: CDP is enabled on your router by default. All other values may be used as VLAN identifiers. C. . If converting from VTP version 3 to VTP version 2. Advertisements contain time-to-live information. use the "no cdp run" command. If more than one VLAN is needed. by default. 120 seconds D.1q frame? A. transparent client server Extended VLANs are only supported in version 3 and not in versions 1 or 2.com/en/US/docs/switches/lan/catalyst6500/ios/12. D. B.2SX/configuration/guide/vtp. C. which indicates the length of time a receiving device should hold Cisco Discovery Protocol information before discarding it.cisco.html QUESTION 62 Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true? A. C.cisco. and network-independent protocol that networking applications use to learn about nearby. VLANs in the range 1006 to 4094 are removed from VTP control.C. CDP is disabled by default and can be enabled globally with the command cdp enable. Each device configured for Cisco Discovery Protocol advertises at least one address at which the device can receive messages and sends periodic advertisements (messages) to the well-known multicast address 01:00:0C:CC:CC:CC.094 VLANs Reference: http://en. html QUESTION 64 What is the size of the VLAN field inside an 802. use the "no cdp enable interface" configuration command. 300 seconds Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Cisco Discovery Protocol is a Layer 2. media-independent.html#wp10175 QUESTION 63 Which VTP mode is needed to configure an extended VLAN. CDP also is enabled on supported interfaces by default. To disable CDP on an interface. Extended-range VLANs are supported only in VTP version 3. To disable it globally. 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. Reference: http://www. Cisco Discovery Protocol is enabled by default. CDP is enabled by default and can be disabled globally with the command no cdp enable. CDP is enabled by default and can be disabled globally with the command no cdp run. every 60 seconds. 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.com/en/US/docs/ios/12_2/configfun/command/reference/frf015. B. C.1Q QUESTION 65 What is the maximum number of VLANs that can be assigned to an access switchport without a voice VLAN? A.org/wiki/IEEE_802.cisco. B.discover. They also listen to messages to learn when interfaces on other devices are up or go down. directly connected devices. B. Reference: http://www.com/en/US/docs/ios-xml/ios/cdp/configuration/15-mt/nm-cdp. Devices discover each other by listening at that address.wikipedia. D. which means the Cisco IOS software will receive CDP information.

D. so even though Cisco IOS will accept both. QUESTION 67 Which feature is automatically enabled when a voice VLAN is configured. B. a port can not be both. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: In this case. B. Obviously. ignoring the switchport access VLAN 10 command. but not automatically disabled when a voice VLAN is removed? A. the port will actually be used as a trunk. the port has been configured both as a trunk and as a switchport in data vlan 10.QUESTION 66 Refer to the exhibit. C. Which option shows the expected result if a show vlan command is issued? A. portfast port-security spanning tree storm control Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: . C. D.

B. B.cisco. ·The Port Fast feature is automatically enabled when voice VLAN is configured. C. . D.Voice VLAN Configuration Guidelines ·You should configure voice VLAN on switch access ports. All switches in the network receive all broadcasts. When you disable voice VLAN. Reference: http://www. Reference: http://www.1Q does not encapsulate the original frame. even in situations in which few users are connected in that VLAN. Use the show vlan privileged EXEC command to see if the VLAN is present (listed in the display). C.com/VTP-Pruning.php QUESTION 70 Which feature must be enabled to eliminate the broadcasting of all unknown traffic to switches that are not participating in the specific VLAN? A.1q header found? A.1q.1001 are pruning eligible.1q. VTP pruning port-security storm control 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.orbit-computer-solutions. it adds a 32-bit field between the source MAC address and the EtherType/length fields of the original frame Reference: http://en. Update the VTP revision number.cisco. All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN. 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/c/en/us/support/docs/lan-switching/vtp/10558.1_22_ea11x/co nfiguration/guide/swvoip.html#vtp_pruning QUESTION 71 Refer to the exhibit. B. The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN.1Q QUESTION 69 Which VLAN range is eligible to be pruned when a network engineer enables VTP pruning on a switch? A. D. However. all the clients in the VTP domain will automatically enable VTP pruning.html QUESTION 68 In which portion of the frame is the 802.com/en/US/docs/switches/lan/catalyst2950/software/release/12.wikipedia. 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 Insertion of 802. but VLAN 1 can't be pruned because it's an administrative VLAN. Which action resolves this problem? A. Reference: http://www. By default. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic. B.org/wiki/IEEE_802. Disable VTP pruning and disable 802. for Ethernet frames. Change VTP mode to server and enable 802. Instead.21. C. C. VLANs 2 .1Q tag in an Ethernet frame 802. there are occasions when VTP can create unnecessary traffic. D. The users in an engineering department that connect to the same access switch cannot access the network. Both VTP versions 1 and 2 supports pruning. The network engineer found that the engineering VLAN is missing from the database. the Port Fast feature is not automatically disabled.

D. The network switches for two companies have been connected and manually configured for the required VLANs. C. Disable DTP and document the VTP domain mismatch. QUESTION 73 A network engineer must implement Ethernet links that are capable of transporting frames and IP traffic for different broadcast domains that are mutually isolated. but version 1 does not. Cisco Discovery Protocol version 2 carries native VLAN information.1Q trunking to pass this new VLAN along to the other switches. 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. Manually force trunking with switchport mode trunk on both switches.dat and ensure that the switch with lowest MAC address is the VTP server. There are 2 different methods for trunking. D. only 802. 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. Consider that this is a multivendor environment. C. but version 2 does not. .1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol. Which Cisco IOS switching feature can be used to achieve the task? A. 802. Of these. Then. you will need to enable 802. QUESTION 74 Which statement about using native VLANs to carry untagged frames is true? A. Enable the company B switch with the vtp mode server command. QUESTION 72 Refer to the exhibit. but users in company A are not able to access network resources in company B when DTP is enabled. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Only VTP servers can add new VLANs to the switched network. Which action resolves this problem? A. The VTP domain names do match and they are both VTP servers so there are no issues there.1q. so to enable vlan 10 on this switch you will first need to change the VTP mode from client to server. Cisco Discovery Protocol version 1 and version 2 carry native VLAN information. B. D. B. Cisco Discovery Protocol version 1 carries native VLAN information. C. 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. Enable VTP pruning and disable 802.1Q and ISL. Delete vlan. B.

1Q trunks. A multilayer switch has been configured to send and receive encapsulated and tagged frames.com/c/en/us/support/docs/switches/catalyst-6500-series.1q Q-in-Q encapsulation? A.switches/24330-185. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Cisco Discovery Protocol (CDP) version 2 passes native VLAN information between Cisco switches. C. Upgrade to VTP version 3 for advanced feature set support. QUESTION 78 What is required for a LAN switch to support 802. Cisco Discovery Protocol version 3 carries native VLAN information. spanning-tree bpdu-filter is enabled. D. however. The "vtp pruning" command prunes VLANs automatically. you will see CDP error messages on the console output. Use trunk pruning vlan 1.aspx? b=CCNP_Studies_Switching&seqNum=25 QUESTION 76 A network engineer must improve bandwidth and resource utilization on the switches by stopping the inefficient flooding of frames on trunk ports where the frames are not needed. not via DTP messages.D. If spanning tree detects a native VLAN mismatch. B. Enable VTP pruning on the VTP server. 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. Reference: http://www.cisco. Reference: http://www. C. Which Cisco IOS feature can be used to achieve this task? A. both with native VLAN mismatch. The "trunk pruning vlan 1" option is not a valid command. VLAN spanning-tree in SW-2 is configured. If you have a native VLAN mismatch.com/articles/article. you must ensure that you choose a common native VLAN for each port in the trunk. the trunk still remains up for other VLANs.1q trunks are on both sides. D. Native VLAN mismatches are detected via spanning tree and Cisco Discovery Protocol (CDP). B. Manually prune default VLAN with switchport trunk allowed vlans remove. but 1 (the default native VLAN) on the other switch.html QUESTION 77 Which action allows a network engineer to limit a default VLAN from being propagated across all trunks? A. Reference: http://www. C.ciscopress. 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. 802. which stops the inefficient flooding of frames where they are not needed. C. VLAN ID 1 should not be used for management traffic because its unsafe. If you use 802.com/library/content.informit. Which option is the cause of the spanning-tree error? A. VLAN 2013 on the multilayer switch is configured as the native VLAN. spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on the trunk. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning. D. D. 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. 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 .asp?p=29803&seqNum=3 QUESTION 75 Refer to the exhibit. B. B. 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. but versions 1 and 2 do not.

and on-on allow the formation of a channel. desirable. desirable. such as a router. auto. D.desirable. The formation of a channel is desired. and G0/4 between two switches using Ethernet port-channel. and on. Only the combinations active-desirable.html#wp1081491 QUESTION 81 Which statement about the use of PagP link aggregation on a Cisco switch that is running Cisco IOS Software is true? A. and on-on allow the formation of a channel. Only the combinations auto-auto. the other two bytes for tag control information (TCI).com/c/en/us/td/docs/ios/12_2sb/feature/guide/gigeth. Reference: http://www. active.cisco. desirable. the lower the priority. PagP modes are active. Configure G0/1 as half duplex and G0/2 as full duplex. and on-on allow the formation of a channel. desirable. 3. except the native VLAN. 2. The channel is forced to remain down. If a device on one side of the channel does not support PagP. and on-on will allow a channel to be formed. Configure LACP port-priority on G0/1 to 1.cisco. auto. 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. PagP modes are off. . How many bytes are added to each frame as a result of the configuration? A.switches/21041-131. C.1_13_ea1/confi guration/guide/swtunnel. desirable. auto: PagP is running passively.1Q tunneling (Q-in-Q) feature increases the frame size by 4 bytes when the extra tag is added.desirable. Because the 802. C. PagP modes are active. Only the combinations auto-desirable. and on. B. desirable: PagP is running actively.html QUESTION 79 Refer to the exhibit. G0/2. the device on the other side must have PagP set to on. The PagP modes are explained below.desirable. and on. on: PagP will not run.desirable. and on. Only the combinations of auto-desirable. desirable. D.com/en/US/docs/switches/lan/catalyst3550/software/release/12. D. and on-on allow the formation of a channel. desirable. desirable. The channel is forced to come up. all VLAN packets are tagged on the trunk link. 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.Explanation/Reference: Explanation: The default system MTU for traffic on Catalyst switches is 1500 bytes. Only the combinations auto-desirable.cisco. B. Only the combinations active-active. desirable-desirable. Which action allows interface G0/1 to always actively forward traffic in the port-channel? A. and on. Reference: http://www. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PagP modes are off. however. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: A LACP port priority is configured on each port using LACP. The valid range is from 1 to 65535. Two bytes are used for the tag protocol identifier (TPID). 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. 4. The default is 32768. 1. desirable. LACP uses the port priority with the port number to form the port identifier. The formation of a channel is desired and initiated. desirable. QUESTION 80 A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1.html QUESTION 82 Refer to the exhibit. Reference: http://www. off: PagP will not run. LACP traffic goes through G0/4 because it is the highest interface ID. it is not initiated. B. Configure LACP port-priority on G0/1 to 65535. PagP modes are off. and on-on will allow a channel to be formed.1Q trunking.com/c/en/us/support/docs/switches/catalyst-2900-xl-series. A VLAN tag adds 4 bytes to the frame. The port priority can be configured automatically or through the CLI. The higher the number.desirable. G0/3. C.

desirable. 3. This is similar to the off state for PAgP. This is similar to the desirable mode of PAgP. The formation of a channel is desired. 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 . QUESTION 83 Refer to the exhibit. which is operating in desirable mode. The peer (in active state) initiates negotiation (when it sends out an LACP packet) which we receive and answer. The formation of a channel is desired and initiated. Active: We can form an aggregate link and initiate the negotiation. desirable. This is similar to the auto mode in PAgP. off: PAgP will not run. and on. Which action can the engineer take to resolve this issue? . auto. C. 1. The link aggregate is formed if the other end runs in LACP active or passive mode. which is only a PAgP mode. eventually to form the aggregation channel with the peer. on: PAgP will not run. however.Which EtherChannel negotiation protocol is configured on the interface f0/13 f0/15? A. it is not initiated.desirable. The channel is forced to remain down. we see that fa 0/13. Off: The link aggregation is not formed. Passive: The switch does not initiate the channel but does understand inbound LACP packets. traffic is still slow. This is similar to the on state for PAgP. and on-on will allow a channel to be formed. The channel is forced to come up. Users of PC-1 experience slow connection when a webpage is requested from the server. We do not send or understand the LACP packet. In this example. To increase bandwidth. B. 2. Only the combinations auto-desirable. desirable: PAgP is running actively. as shown here: Server_Switch#sh etherchannel load-balance EtherChannel Load-Balancing Operational State (src-mac): Non-IP: Source MAC address IPv4: Source MAC address IPv6: Source IP address Server_Switch# HoweIer. Link Combination Control Protocol Port Aggregation Protocol Port Combination Protocol Link Aggregation Control Protocol Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PAgP modes are off.In other words. 4. the network engineer configured an EtherChannel on interfaces Fa1/0 and Fa0/1 of the server farm switch. auto: PAgP is running passively. the switch neither sends the LACP packet nor processes any inbound LACP packet. D. fa0/14. and fa0/15 are all in Port Channel 12.

When a bundle already exists and a VLAN of a port is modified. The load balancing method should be changed to destination MAC. PAgP does not change the port speed and duplex for all ports in the bundle until the switch is rebooted. auto.cisco.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. Change the load-balance method to dst-mac. C. and all must be configured as either Layer 2 or Layer 3 interfaces.A. .html QUESTION 86 Refer to the exhibit. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. B. B. desirable. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. B. since the web server has two NICs traffic will be load balanced across both MAC addresses. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 16 Gbps only for Gigabit EtherChannel. such as a router. Contact Cisco TAC to report a bug on the switch.cisco. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 10 Gbps only for Gigabit EtherChannel. 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. D. C. Disable EtherChannel load balancing. All interfaces in each EtherChannel must be the same speed. 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. C. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. and on-on allow the formation of a channel. PAgP packets are sent between EtherChannel-capable ports in order to negotiate the formation of a channel. and on. QUESTION 84 A network engineer changed the port speed and duplex setting of an existing EtherChannel bundle that uses the PAgP protocol. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PAgP aids in the automatic creation of EtherChannel links. desirable. and since the load balancing method is source MAC. the source MAC address will always be that of PC-1. PAgP changes the port speed and duplex for all ports in the bundle.desirable. PAgP requires that all ports in the channel belong to the same VLAN or are configured as trunk ports. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Since this traffic is coming from PC-1. D. PAgP changes the port speed but not the duplex for all ports in the bundle. D.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. Some restrictions are deliberately introduced into PAgP.html QUESTION 85 Which statement about using EtherChannel on Cisco IOS switches is true? A. PAgP drops the ports that do not match the configuration. PAgP changes the port speed and duplex for all ports in the bundle. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. Only the combinations auto-desirable. all ports in the bundle are modified to match that VLAN. Reference: http://www. If speed and duplex change when a bundle exists. Upgrade the switch IOS to IP services image. 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. The restrictions are: ·PAgP does not form a bundle on ports that are configured for dynamic VLANs. Which statement describes what happens to all ports in the bundle? A. Reference: http://www. ·PAgP does not group ports that operate at different speeds or port duplex. ·PAgP modes are off. traffic will only be using one of the port channel links.

802. but when a RSTP switch receives an 802. it assumes that it is connected to an 802.1D BPDUs.1d does not understand RSTP BPDUs because they are different versions.1d to communicate. Reference: http://www.1d BPDU and eventually the two switches run 802. and CST spanning trees: An IST is the spanning tree that runs in an MST region. but when a RSTP switch receives a 802. B. Fa0/14.1d to communicate.1d BPDU. C.1d BPDU. and RSTP BPDUs are sent. if the RSTP switch is using 802. and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol. B.1D switches.2SX/configuration/guide/book/spantree. Logical port Fa0/13. CIST. MST establishes and maintains IST. in which all the spanning tree instances are independent. and Fa0/15 successfully formed a Layer 2 physical port-channel interface using a Cisco proprietary protocol.1d BPDU.1d BPDU and eventually the two switches run 802. the switch processes all BPDUs received on that port and ignores the protocol type. D. All other MST . MST maintains multiple spanning tree instances.1d does not understand RSTP BPDUs because they are different versions. Fa0/14.1d to communicate. Logical port Fa0/13. B. known as the IST. However.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired. which is Cisco proprietary. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: These three ports show that they are in Port Channel 1. When a port is initialized. C. and Fa0/15 successfully formed a Layer 3 physical port-channel interface using an open standard protocol. The protocol used for this port channel shows as LACP. D. Fa0/14. it does not respond with a 802. Physical port Fa0/13. Within each MST region. Fa0/14.1d BPDU. as opposed to PagP.cisco. the migrate-delay timer is started (specifies the minimum time during which RSTP BPDUs are sent). 802. While this timer is active. RSTP selectively sends 802. D.1d BPDU and eventually the two switches run 802. Instance 0 is a special instance for a region. it responds with a 802.1d understands RSTP BPDUs because they are the same version.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. what is the total number of spanning-tree instances running on the switch? A. C. it responds with an 802. but when a RSTP switch receives a 802.1d BPDU? A.1D switch and starts using only 802. it does not respond with a 802.1D configuration BPDUs and TCN BPDUs on a per-port basis. 802.html QUESTION 88 When two MST instances (MST 1 and MST 2) are created on a switch. but when a RSTP switch receives a 802. which is a standards based protocol. If the switch receives an 802.Which statement about switch S1 is true? A. it restarts the timer and starts using RSTP BPDUs on that port.1d understands RSTP BPDUs because they are the same version. and the (SU) means they are in use and operating at layer 2. and Fa0/15 successfully formed a Layer 3 port-channel interface using a Cisco proprietary protocol.1d BPDU. 1 2 3 4 Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Unlike other spanning tree protocols. Physical port Fa0/13.1D BPDU after the port migration-delay timer has expired. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: For backward compatibility with 802. 802. QUESTION 87 What happens on a Cisco switch that runs Cisco IOS when an RSTP-configured switch receives 802.

com/en/US/docs/switches/lan/catalyst2950/software/release/12. Reference: http://www. and the special 0 instance. Reference: http://www.instances are numbered from 1 to 4094. . Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16. root path cost.cisco. Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0. STP considers port priority when selecting a LAN port to put into the forwarding state.html QUESTION 89 Refer to the exhibit. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: If a loop occurs. configurable in increments of 16. MST instance 1 in region A is independent of MST instance 1 in region B. D. A CIST is a collection of the ISTs in each MST region. STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports. Because the MST BPDU carries information for all instances. C. all VLANs are assigned to the IST. In the case for this question.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. 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. and so forth. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16.1_9_ea1/config uration/guide/swstp. The IST is the only spanning tree instance that sends and receives BPDUs. even if regions A and B are interconnected. If all LAN ports have the same priority value. the number of BPDUs that need to be processed to support multiple spanning tree instances is 65sernamcantly reduced.html#wp1105354 QUESTION 90 Refer to the exhibit. for a total of 3 instances. All MST instances within the same region share the same protocol timers.cisco. for example. All of the other spanning tree instance information is contained in MSTP records (Mrecords). but each MST instance has its own topology parameters. The possible priority range is 0 through 240 (default 128). Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0. there will be the 2 defined MST instances. f1/0 and f1/1 have the same end-to-end path cost to the designated bridge. B. By default. such as root bridge ID.2SX/configuration/guide/book/spantree. A lower path cost represents higher-speed transmission and is preferred. An MST instance is local to the region. Which action is needed to modify the Layer 2 spanning-tree network so that traffic for PC1 VLAN from switch SW3 uses switchport f1/1 as a primary port? A. The CST interconnects the MST regions and single spanning trees. which are 65sername6565eed within MST BPDUs.

the more likely the switch will be chosen as the root switch. The lower the number. The bridge priority is 128.Why would the switch be considered as a root bridge? A. The switch priority value is zero. Reference: https://community. fa0/21 has te lowest cost. the default is 32768.com/extreme/topics/802_1d_spanning_tree_election_rules . which represents the best path to the Root Bridge. C. interface f0/13 interface f0/14 interface f0/15 68sername68e 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. B. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: For priority.lowest prevails In this case.html#wp1020666 QUESTION 91 Refer to the exhibit. D. the range is 0 to 61440 in increments of 4096. which option will be the new root port for VLAN 10? A. B. The switch priority for VLAN 1 and the macro specifies "This Bridge is the root". Reference: http://www.cisco. C.1_9_ea1/config uration/guide/swstp. so it will be th root port. Total  Path Cost  to root . it has the lowest priority value for VLAN 1.lowest prevails Connected  Port ID  (Port Priority + Port#) .19 and all ports are forwarding.extremenetworks.lowest prevail– Local  Port ID  .com/en/US/docs/switches/lan/catalyst2950/software/release/12. D. from the direction of Root Bridge) Connected  Bridge ID  . Considering the default cost of upstream bridges to the root bridge is equal. The bridge priority is 1 and all ports are forwarding.lowest prevails (local Root Port cost added upon receipt of Configuration –PDUs on that port. All ports are members of VLAN 10.

mLACP does not support multiple neighbors. B. It is not available in VSS. It is available only on a Cisco Catalyst 6500 Series chassis. STP still monitors incoming BPDUs that would indicate it should return to the blocking state to prevent a loop. C. 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. and forwarding states. D. If an interface is enabled for portfast receives BDPU. root guard moves this port to a root-inconsistent STP state. With the initial version of spanning tree. follow these guidelines and restrictions: PFC3A mode does not support the mLACP for server access feature. root bridge ports are all designated ports. B. No more than 100 VLANs can be active on a switch configured as a PoA. Configure port to duplex full and speed 1000. . Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: When configuring mLACP for Server Access. Configure spanning-tree portfast. and forwarding states should be used.Learning . Reference: http://www.A port that would cause a switching loop. Configure port duplex and speed to auto negotiation.cisco. VSS mode does not support the mLACP for server access feature.Listening . this process could take from 30-60 seconds.The switch processes BPDUs and awaits possible new information that would cause it to return to the blocking state. the root guard enforces the position of the root bridge. The engineer observes that when the PC is connected to the network. The DHD system priority must be lower (higher numerically) than the PoA system priority. C. 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.cmed. The port goes into loop-inconsistent state and stops forwarding traffic. D. then the default action of STP of listening. Reference: http://net. It does not support 1Gb links. learning. These steps are outlined as follows. Switchone(config) # Spanning-tree portfast bpdufilter default Which statement about the spanning-tree portfast feature on the switch is true? A. If an interface is enabled for portfast receives BDPU. In this way. 1. B.QUESTION 92 A network engineer is trying to deploy a PC on a network.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b. learning. the port goes into the spanning-tree inconsistent state. it takes 30 to 60 seconds for the PC to see any activity on the network interface card. STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately. 3. BPDU data is still received in blocking state. The port goes into root-inconsistent state and stops forwarding traffic. QUESTION 94 Which statement describes what happens when a port configured with root guard receives a superior BPDU? A. If the bridge receives superior STP Bridge Protocol Data Units (BPDUs) on a root guard-enabled port. D. This root-inconsistent state is effectively equal to a listening state. each port goes through 4 states to ensure that there are no physical loops in the layer 2 broadcast domain. If an interface is enabled for portfast receives BDPU. C. unless two or more ports of the root bridge are connected together. bypassing the listening and learning states. the port is shut down immediately. The port goes into BPDU-inconsistent state and stops forwarding traffic. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The root guard ensures that the port on which root guard is enabled is the designated port. No traffic is forIarded across this port. The port goes into errdisabled state and stops forwarding traffic. the port goes through the spanning-tree listening. Normally. However.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. Which Layer 2 enhancement can be used to eliminate this delay? A. Converting a port channel to mLACP can cause a service disruption. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: When first powered on. D. the "Spanning-tree portfast bpdufilter default" command specifies that if a BPDU is received on that port. If an interface is enabled for portfast receives BDPU. 2. normal operation.Forwarding .A port receiving and sending data. mLACP does not support half-duplex links.us/Home/ethernet-and-ip/spanning-tree-protocol QUESTION 93 A network engineer configured an Ethernet switch using these commands. and forwarding states. learning.shtml QUESTION 95 Which statement about restrictions for multichassis LACP is true? A. C. the port does not go through the spanning-tree listening. bypassing the listening and learning states. Converting a port channel to mLACP can cause a service disruption.Blocking . B. Configure no switchport.

but the new active virtual switch forwards traffic on all links. Reference: http://www.Reference: http://www. C. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. The VSS transitions to the dual active recovery mode. C. They have just added a new switch (SwitchB) to the existing network as shown in the topology diagram. All interfaces are shut down in the formerly active virtual switch member. and both virtual switch members continue to forward traffic independently.com. The new active virtual switch continues to forward traffic on all links. SwitchA is currently configured correctly.2(33)SXI) In the dual active recovery mode. B. RouterA is currently configured correctly and is providing the routing function for devices on SwitchA and SwitchB. SwitchB has a minimal configuration.cisco.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b.html QUESTION 98 Which statement describes what happens when a switch enters dual active recovery mode? A. B. The switch shuts down and waits for the VSL link to be restored before sending traffic. 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. Configuration Requirements for SwitchA The VTP and STP configuration modes on SwitchA should not be modified. The VSS transitions to the dual active recovery mode. and only the new active virtual switch continues to forward traffic.Name: Marketing .html QUESTION 99 SIMULATION Scenario: You work for SWITCH. You have been tasked with competing the needed configuring of SwitchA and SwitchB. 13.2SX/configuration/guide/mla cp_server_support. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: In the dual active recovery mode. Reference: http://www. Configuration Requirements for SwitchB • Vlan 21 .html QUESTION 96 What is the maximum number of 10 Gigabit Ethernet connections that can be utilized in an EtherChannel for the virtual switch link? A. C. What happens if all VSL connections between the virtual switch members are lost? A. 12. D. The new active virtual switch continues to forward traffic on all links.com/en/US/docs/switches/lan/catalyst6500/ios/12. If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up. 21. B. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Q. 22 and 23. Both virtual switch members cease to forward traffic.cisco.cisco.html QUESTION 97 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A. Reference: http://www. • SwitchA needs to be the root switch for vlans 11. D. The virtual switch members reload. but will need to be modified to support the addition of SwitchB.cisco. SwitchA and SwitchB use Cisco as the enable password. 4 6 8 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 . 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. the VSS will transition to the dual active recovery mode. All other vlans should be left are their default values. D. The VSS detects which system was last in active state and shuts down the other switch.

• Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. 22 and 23 should tagged when traversing the trunk link.168.• • • • • • • . 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.A 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.will support two servers attached to fa0/13 and fa0/14 Vlan 23 . • The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all vlans.21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1. This mode should be done with a non-proprietary protocol.1.Name: Sales .will support two servers attached to fa0/9 and fa0/10 Vlan 22 .11/24 Inter-switch Connectivity Configuration Requirements • For operational and security reasons trunking should be unconditional and Vlans 1.21-23 channel-protocol lacp . Correct Answer: Here is the solution below: Section: Layer 2 Technologies Explanation Explanation/Reference: Here are steps: hostname SWITCH_B ! ! vlan 21 name Marketing vlan 22 name Sales vlan 23 name Engineering ! ! interface FastEthernet0/3 switchport trunk allowed vlan 1. SwitchB VTP mode needs to be the same as SwitchA.Name: Engineering . with SwitchA controlling activation.

11 255.168.255.1.21-23 ! interface Vlan1 ip address 192.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 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 1.255.0 ! end SWITCH_B(config)# .

168.1.1 ! ! End QUESTION 100 SIMULATION .21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/21 switchport access vlan 21 switchport mode access ! interface FastEthernet0/22 switchport access vlan 22 switchport mode access ! interface FastEthernet0/23 switchport access vlan 23 switchport mode access ! interface GigabitEthernet1/1 ! interface GigabitEthernet1/2 ! interface Port-channel 1 ! interface Vlan1 no ip address shutdown ! ip default-gateway 192.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.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.

All routes must be learned via the EIGRP routing protocol.10.10.190. Routed interfaces should use the lowest host on a subnet when possible.200. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway.32/27 . The following subnets are available to implement this solution: .You have been tasked with configuring multilayer SwitchC. changes VLAN port assignments or create trunks.250. . which has a partial configuration and has been attached to RouterC as shown in the topology diagram. Company policies forbid the use of static or default routing.190. No trunking has been configured on RouterC.10. Also SwitchC needs to be able to ping server S1.0/24 . Note: Due to administrative restrictions and requirements you should not add or delete VLANs. Company policies forbid the use of static or default routing. RouterC is correctly configured. SwitchC uses Cisco as the enable password. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links.250. You do not have access to RouteC.200. All routes must be learned via EIGRP 65010 routing protocol. Routing must only be enabled for the specific subnets shown in the diagram.

2 255.10.200.255.Correct Answer: Here is the solution below: Section: Layer 2 Technologies Explanation Explanation/Reference: There are two ways to configure interVLAN routing in this case: + Use RouterC as a "router on a stick" and SwitchC as a pure Layer2 switch. + Only use SwitchC for interVLAN routing without using RouterC.255. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 . SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router).10. No trunking requires.255.250.200. SwitchC(config-if)# ip address 10.200. 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. gi0/11 interfaces were configured as access ports so we don't need to configure them in this sim.33 Host2: + Default gateway: 190.10.250. the simulator does not let you assign IP address on Gi0/1 interface. C:\>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190.65 Now we have enough information to configure SwitchC (notice the EIGRP AS in this case is 650) Note: VLAN2 and VLAN3 were created and gi0/10.1 so this is the lowest usable IP address.0 ->RouterC has used IP 10.250. We should check the default gateways on H1 & H2. Trunking must be established between RouterC and SwitchC.10.255. Click on H1 and H2 and type the "ipconfig" command to get their default gateways. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.33 255.

65 255. QUESTION 101 You have been asked to install and configure a new switch in a customer network.0.0.31 SwitchC(config-router)# network 190. so you will not miss within it in the exam.0.0.255.31 and "network 190. But after finishing the configuration. we can use "show run" command to verify.0.32 0.64 0.0.200. no neighbor relationship is formed between RouterC and SwitchC.0 is shown. even without "no auto-summary" command the network still works correctly.0/16 is not used anywhere else in this topology.0.32 0. in fact it is not necessary because the network 190. we are pretty sure instead of using two commands "network 190. Also some reports said the "no auto-summary" command can't be used in the simulator.250.255.0.200.224 SwitchC(config-if)# no shutdown SwitchC(config-if)#exit SwitchC(config)# ip routing (Notice: MLS will not work without this command) SwitchC(config)# router eigrp 65010 SwitchC(config-router)# network 10.0.200.SwitchC(config-if)# ip address 190. only the summarized network 190.200.0. In fact.10. . and from the PCs as well.200.200. you should expect the ping to SERVER to succeed from the MLS. also don't modify/delete any port just do the above configuration. just for sure. In order to complete the lab.250.250.255 SwitchC(config-router)# network 190.200.250. Use the console access to the existing and new switches to configure and verify correct device configuration.64 0.31 we can use one simple command "network 190.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED.0. But in the exam the sim is just a flash based simulator so we should use two above commands.0 0.10.0.0.250. If you use wrong AS number. Also make sure you use the correct EIGRP AS number (in the configuration above it is 650 but it will change when you take the exam) but we are not allowed to access RouterC so the only way to find out the EIGRP AS is to look at the exhibit above.200.0 because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised.

.

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

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

. Note that the VTP versions supported in this network are 1. This leaves only choice D and E. 3 so either VTP version 2 or 3 can be configured on the new switch. leaving only choice D as correct. We also see from the topology diagram that eth 0/0 of the new switch connects to a PC in VLNA 100. 2.So we know that the VTP domain must be CCNP. QUESTION 102 You have been asked to install and configure a new switch in a customer network. so we know that this port must be an access port in VLAN 100. Use the console access to the existing and new switches to configure and verify correct device configuration.

.

.

By issuing the "show interface trunk" command on SW1 and SW2 we see the native VLAN is 99. VLAN1 VLAN 99 VLAN 999 VLAN 40 VLAN 50 VLAN 200 VLAN 300 Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The native VLAN is used for untagged frames sent along a trunk. C. . B. D. G.Refer to the configuration. F. For which configured VLAN are untagged frames sent over trunk between SW1 and SW2? A. E.

QUESTION 103 You have been asked to install and configure a new switch in a customer network. . Use the console access to the existing and new switches to configure and verify correct device configuration.

You are adding new VLANs. VLAN500 and VLAN600 to the topology in such way that you need to configure SW1 as primary root for VLAN 500 and secondary for
VLAN 600 and SW2 as primary root for VLAN 600 and secondary for VLAN 500. Which configuration step is valid?
A.
B.
C.
D.
E.

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 ,SW2 and SW4
On SW2; configure vtp mode as off and configure VLAN 500 and VLAN 600; configure back to vtp server mode.

Correct Answer: A
Section: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:
By issuing the "show vtp status command on SW2, SW2, and SW4 we see that both SW1 and SW2 are operating in VTP server mode, but SW4 is a client, so we
will need to add both VLANs to SW1 and SW2.

.QUESTION 104 You have been asked to install and configure a new switch in a customer network. Use the console access to the existing and new switches to configure and verify correct device configuration.

Examine the VTP configuration. 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.
B.
C.
D.
E.

Disable VTP pruning on SW1 only
Disable VTP pruning on SW2 only
Disable VTP pruning on SW4 only
Disable VTP pruning on SW2, SW4 and New_Switch
Disable VTP pruning on New_Switch and SW4 only.

Correct Answer: C
Section: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:
To create private VLANs, you will need to only disable pruning on the switch that contains the private VLANs. In this case, only SW4 will connect to servers in a
private VLAN.
QUESTION 105
A Cisco Catalyst switch that is prone to reboots continues to rebuild the DHCP snooping database. What is the solution to avoid the snooping database from being
rebuilt after every device reboot?
A.
B.
C.
D.

A DHCP snooping database agent should be configured.
Enable DHCP snooping for all VLANs that are associated with the switch.
Disable Option 82 for DHCP data insertion.
Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting.

E. Apply ip dhcp snooping trust on all interfaces with dynamic addresses.
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. Define and configure the DHCP server.
2. Enable DHCP snooping on at least one VLAN.
By default, DHCP snooping is inactive on all VLANs.
3. Ensure that DHCP server is connected through a trusted interface. By default, the trust state of all interfaces is untrusted.
4. Configure the DHCP snooping database agent.
This step ensures that database entries are restored after a restart or switchover.
5. Enable DHCP snooping globally.
The feature is not active until you complete this step.
Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/sno odhcp.html#wp1090479
QUESTION 106
Which portion of AAA looks at what a user has access to?
A.
B.
C.
D.

authorization
authentication
accounting
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. Depending
on your security options, it can also support encryption.
Authorization: After initial authentication, authorization looks at what that authenticated user has access to do . RADIUS or TACACS+ security servers
perform authorization for specific privileges by defining attribute-value (AV) pairs, which would be specific to the individual user rights. In the Cisco IOS, you can
define AAA authorization with a named list or authorization method.
Accounting: The last "A" is for accounting. It provides a way"o" collecting security information that you can use for billing, auditing, and reporting. You can use
accounting to see what users do once they are authenticated and authorized. For example, with accounting, you could get a log of when users logged in and
when they logged out.
Reference: http://www.techrepublic.com/blog/data-center/what-is-aaa-and-how-do-you- configure-it-in-the-cisco-ios/
QUESTION 107
Which command creates a login authentication method named "login" that will primarily use RADIUS and fail over to the local user database?
A.
B.
C.
D.

(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. It also lists radius first then local, so it will primarily
use RADIUS for authentication and fail over to the local user database only if the RADIUS server is unreachable.
QUESTION 108
A server with a statically assigned IP address is attached to a switch that is provisioned for DHCP snooping. For more protection against malicious attacks, the
network team is considering enabling dynamic ARP inspection alongside DHCP snooping. Which solution ensures that the server maintains network reachability in
the future?
A.
B.
C.
D.

Disable DHCP snooping information option.
Configure a static DHCP snooping binding entry on the switch.
Trust the interface that is connected to the server with the ip dhcp snooping trust command.
Verify the source MAC address of all untrusted interfaces with ip dhcp snooping verify mac- address command.

Correct Answer: B
Section: Infrastructure Security
Explanation
Explanation/Reference:
Explanation:
Dynamic ARP inspection is a security feature that validates ARP packets in a network. It intercepts, logs, and discards ARP packets with invalid IP-to-MAC address
bindings. This capability protects the network from certain man-in-the-middle attacks. Dynamic ARP inspection ensures that only valid ARP requests and responses
are relayed. The switch performs these activities:
·Intercepts all ARP requests and responses on untrusted ports
·Verifies that each of these intercepted packets has a valid IP-to-MAC address binding before updating the local ARP cache or before forwarding the packet to
the appropriate destination.
·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, the DHCP snooping
binding database. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. If the ARP packet is received on a
trusted interface, the switch forwards the packet without any checks. On untrusted interfaces, the switch forwards the packet only if it is valid. To ensure network
reachability to the server, configure a static DHCP snooping binding entry on the switch.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12- 2_55_se/configuration/guide/scg3750/swdynarp.html

com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12.cisco. Reference: http://www. C.html#ipsourceguard QUESTION 111 A DHCP configured router is connected directly to a switch that has been provisioned with DHCP snooping. The switch is configured for sdm prefer routing as the switched database management template. and its associated VLAN number.2_25_see/configuration/guide/3550SCG/ swdhcp82. or with source IP and MAC address filtering. B. The packets originating from the workstation are assumed to be spoofed and will be discarded.cisco. The port ACL allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic. 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). B. You can enable IP source guard when DHCP snooping is enabled on an untrusted interface. D. DHCP snooping must be enabled on all VLANs. the packets are assumed to be spoofed and will be discarded. using the ip verify source port. After IP source guard is enabled on an interface. An entry in this table has an IP address. 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. No VLANs exist on the switch and/or the switch is configured in VTP transparent mode. Enable VTP version 3. B.ciscopress. the switch blocks all IP traffic received on the interface. but is unable to configure ip verify source under several of the interfaces. its associated MAC address. C. Disable VTP and manually assign VLANs. Traffic will pass accordingly after the new IP address is populated into the binding database.com/c/en/us/support/docs/switches/catalyst-3750-series. D. However. Static DHCP bindings are not configured on the switch. The MAC address in the DHCP packet is not learned as a secure address. IP traffic is filtered based on the source IP address. Correct Answer: C Section: Infrastructure Security Explanation Explanation/Reference: Explanation: You must configure VTP to transparent mode before you can create a private VLAN. The configured SVIs on the switch have been removed for the associated interfaces. Which option is the cause of this issue? A. When IP source guard is enabled with this option. or the client is not assigned an IP address. You can configure IP source guard with source IP address filtering. The IP address of one of the workstations does not match any entries found in the DHCP binding database. The local DHCP server is disabled prior to enabling IP Source Guard.QUESTION 109 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN. When IP source guard is enabled with this option. 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. Private VLANs also carry TLVs that are not known to all types of Cisco switches. The switch uses the IP source binding table only wIen IP source guard is enabled. You can use IP source guard to prevent traffic attacks caused when a host tries to use the IP address of its neighbor. Correct Answer: B Section: Infrastructure Security Explanation Explanation/Reference: Explanation: IP source guard is a security feature that restricts IP traffic on nonrouted. The interfaces are configured as Layer 3 using the no switchport command. B. Packets from the workstation will be rate limited according to the default values set on the switch. Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: When you enable both IP Source Guard and Port Security. clients are not receiving an IP address via the DHCP server.switches/72846-layer2-secftrs-catl3fixed. and its associated VLAN number. The interface that is connected to the workstation in question will be put into the errdisabled state. Which option is the cause of the problem? A. The MAC address of the DHCP client is learned as a secure address only when the switch receives non-DHCP data traffic.html#wp1069615 QUESTION 112 A switch is added into the production network to increase port capacity. Configure VTP Transparent Mode.security interface configuration command. D. If there is no match. An entry in this table has an IP address. A port access control list (ACL) is applied to the interface. The switch uses the IP source binding table only when IP source guard is enabled. The switch forwards traffic only when the source IP and MAC addresses match an entry in the IP source binding table. there are two caveats: The DHCP server must support option 82.asp?p=29803&seqNum=6 QUESTION 110 DHCP snooping and IP Source Guard have been configured on a switch that connects to several client workstations. IP traffic is filtered based on the source IP and MAC addresses. The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). A network engineer is configuring the switch for DHCP snooping and IP Source Guard. C. Reference: http://www. C. its associated MAC address. Ensure all switches are configured as VTP server mode. Which statement describes the outcome of this scenario? A. E. Layer 2 interfaces by filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings. . Private VLANs are configured in the context of a single switch and cannot have members on other switches. The DHCP client interfaces have storm control configured. even if they are not utilized for dynamic address allocation. except for DHCP packets allowed by DHCP snooping. Reference: http://www. Which configuration must be made before the private VLAN is configured? A.com/articles/ article. The DHCP server does not support information option 82. D.

the broadcast keyword was used so only broadcast traffic is limited. D.2/53SG/configuration/config/port_sec.html#wp1069615 QUESTION 113 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server. Which command accomplishes this task? A. D. B. You can configure IP source guard with source IP address filtering or with source IP and MAC address filtering. This is the default mode. Only broadcast traffic is limited by this particular storm control configuration. C.) A. including access and trunk ports. They decide to configure the network to automate the process of re-enabling user ports.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth. Reference: http://www. you can bring it out of this state automatically by configuring the errdisable recovery cause psecure-violation global configuration command or you can manually reenable it by entering the shutdown and no shut down interface configuration commands. B. F. B.com/c/en/us/td/docs/switches/lan/catalyst3550/ software/release/12. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port. Reference: http://www. 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.cisco. Here is an example output: Switch> show mac-address-table Dynamic Addresses Count: 9 . 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.cisco. The switch resumes forwarding broadcasts when they are below 65% of bandwidth.IP source guard is supported only on Layer 2 ports. 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. E. E. E. If a port is in per-VLAN errdisable mode. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. In which three ways does this command impact the traffic? (Choose three.2_25_see/configuration/guide/3550SCG/swtrafc. including the switch port that the particular host is using. C.html QUESTION 114 After port security is deployed throughout an enterprise campus. C. The switch drops broadcasts when they reach 75% of bandwidth.2_25_see/configuration/guide/3550SCG/ swdhcp82. the network team has been overwhelmed with port reset requests. Which two commands help trace this PC when the MAC address is known? (Choose two.) A. D. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth.cisco. Reference: http://www.pdf QUESTION 115 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server. Correct Answer: CDF Section: Infrastructure Security Explanation Explanation/Reference: Explanation: In this case.com/c/en/us/td/docs/switches/lan/catalyst4500/12.

C. E. Method lists are specific to the authorization type requested: Auth-proxy--Applies specific security policies on a per-user basis. SLIP. B.ht ml QUESTION 118 Which AAA Authorization type includes PPP. the Cisco IOS software selects the next method listed in the method list.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen.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 ------------------. enable AAA by using the aaa new-model global configuration command. This process continues until there is successful communication with a listed authorization method. if that method fails to respond. thus ensuring a backup system in case the initial method fails. 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. Reverse Access--Applies to reverse Telnet sessions. When you create a named method list. B.cisco. or unicast storm on a port. TACACS+ . A method list is simply a named list describing the authorization methods to be queried (such as RADIUS or TACACS+). Errors in the protocol-stack implementation.7b00. Command authorization attempts authorization for all EXEC mode commands.1540 Dynamic 2 FastEthernet0/5 0010. or all methods defined are exhausted. Which option decreases consumption of bandwidth used by broadcast traffic? A. you are defining a particular list of authorization methods for the indicated authorization type. Reference: http://www. You can also set the switch to shut down the port when the rising threshold is reached. in sequence.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathor. By default. or ARAP connection.1_22ea/SCG/scg/swtrafc.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12. D.cisco. B. Storm control is configured for the switch as a whole but operates on a per-port basis. AAA features are not available for use until you enable AAA globally by issuing the aaa new-model command.cisco. and ARAP connections? A. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces. multicast.1545 Dynamic 2 FastEthernet0/5 QUESTION 116 While troubleshooting a network outage.-------------------0010. Reference: http://www. SLIP.e289 Dynamic 1 FastEthernet0/1 0010. or users issuing a denial-of-service attack can cause a storm. D. 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. or multicast packets. A LAN storm occurs when packets flood the LAN. Method lists enable you to designate one or more security protocols to be used for authorization.-----------.---. Cisco IOS software uses the first method listed to authorize users for specific network services.7b00. This can include a PPP. aaa new-model aaa authentication aaa authorization aaa accounting Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: To configure AAA authentication. D. C. associated with a specific privilege level. For detailed information on the authentication proxy feature.html QUESTION 117 Which command globally enables AAA on a device? A. unicast. RADIUS with EAP Extension B. EXEC--Applies to the attributes associated with a user EXEC terminal session. Network--Applies to network connections. including global configuration commands.0de0. Reference: http://www.ht ml QUESTION 119 Which authentication service is needed to configure 802. Storm control uses rising and falling thresholds to block and then restore the forwarding of broadcast. mistakes in network configuration.1x? A. storm control is disabled. 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. creating excessive traffic and degrading network performance.

in which order does the device check the login credentials? A.cisco. When a network administrator is attempting an SSH connection to the device. B. local username Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: sessions use the vty lines. C. Reference: http://www. C." The AAA default login preference is stated in order from first to last.1x. the authentication server--performs the actual authentication of the client. local username. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server. Because the switch acts as the proxy. A. local username. B. line password. which lists none as the authentication method. the authentication service is transparent to the client. 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.pdf QUESTION 120 Refer to the exhibit. None means no authentication. line password RADIUS server. if that fails use the line password.C. D. RADIUS using VSA Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: lanation: With 802. RADIUS server Line password. QUESTION 122 Which type of information does the DHCP snooping binding database contain? . D. Which login credentials are required when connecting to the console port in this output? A. QUESTION 121 Refer to the exhibit. where the configured authentication method is named "default. local username Line password. RADIUS with CoA D. RADIUS server. Finally. none required 113sernamee cisco with password cisco no username with password linepass login authentication default Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Here the console has been configured with the NO_AUTH name. so here the "aaa authentication login default group radius local line" means to use RADIUS first. meaning that credentials are not required and all sessions are allowed access immediately.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/ 12-1_19_ea1/configuration/guide/2940scg_1/sw8021x. then if that fails use the local user database. RADIUS server.

These interfaces are isolated from all other interfaces in other communities and from all isolated ports within the private VLAN domain. Dynamic ARP Inspection storm control VTP pruning DHCP snooping Correct Answer: A Section: Infrastructure Security 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. C. Each port is completely isolated from all other ports in the isolated VLAN.html QUESTION 125 Which private VLAN access port belongs to the primary VLAN and can communicate with all interfaces. This port has complete isolation from other ports within the same private VLAN domain. B. Reference: http://www. Reference: http://www. Isolated--An isolated port is a host port that belongs to an isolated secondary VLAN. B. Private VLANs block all traffic to isolated ports except traffic from promiscuous ports.cisco. Community--A community port is a host port that belongs to a community secondary VLAN. follow these guidelines: DHCP snooping is not active until you enable the feature on at least one VLAN. Traffic received from an isolated port is forwarded only to promiscuous ports. 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. Builds and maintains the DHCP snooping binding database. 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.series-switches/72846-layer2-secftrs-catl3fixed. B. You can associate a secondary VLAN to more than one promiscuous port.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. Utilizes the DHCP snooping binding database to validate subsequent requests from untrusted hosts. make sure that the devices acting as the DHCP server and the DHCP relay agent are configured and enabled. Reference: . the switch forwards the packet without any checks. and enable DHCP globally on the switch. The promiscuous port can communicate with all interfaces. including the community and isolated host ports. The DHCP snooping feature performs the following activities: Validates DHCP messages received from untrusted sources and filters out invalid messages. associated to that port. You may want to do this for load-balancing or redundancy purposes. You can also have secondary VLANs that are not associated to any promiscuous port. configure the port as trusted by entering the "ip dhcp snooping trust" interface configuration command. Each promiscuous port can have several secondary VLANs. promiscuous port isolated port community port trunk port Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: The types of private VLAN ports are as follows: Promiscuous--A promiscuous port belongs to the primary VLAN.cisco. including the community and isolated host ports? A. C.pdf QUESTION 123 Which switch feature determines validity based on IP-to-MAC address bindings that are stored in a trusted database? A. D.A. the switch forwards the packet only if it is valid. D. C.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. which contains information about untrusted hosts with leased IP addresses . except that it can communicate with associated promiscuous ports. that belong to those secondary VLANs associated to the promiscuous port and associated with the primary VLAN. On untrusted interfaces. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. If the ARP packet is received on a trusted interface. the DHCP snooping binding database. You can have several promiscuous ports in a primary VLAN. You can have more than one isolated port in a specified isolated VLAN. as long as the promiscuous port and secondary VLANs are within the same primary VLAN. Before globally enabling DHCP snooping on the switch. A. D. If a Layer 2 LAN port is connected to a DHCP server. Reference: http://www.2SX/configuration/guide/book/snoodhcp. Community ports communicate with other ports in the same community VLAN and with associated promiscuous ports. Rate-limits DHCP traffic from trusted and untrusted sources.com/c/en/us/support/docs/switches/catalyst-3750. B.html QUESTION 124 Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP server? A. If a Layer 2 LAN port is connected to a DHCP client. configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command.2SX/configuration/guide/book/snoodhcp. C. D. or no secondary VLANs.cisco.

C.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs. Isolated.The primary VLAN carries traffic from the promiscuous ports to the host ports. B. You can configure multiple community VLANs in a private VLAN domain. the source IP address filter is applied on all the VLANs. It may also contain static entries that you have created.html QUESTION 126 Which private VLAN can have only one VLAN and be a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports and the gateway? A.0_2_EX/security/configuration_guide/b_sec_152ex_2960-x_cg/ b_sec_152ex_2960. both isolated and community. which feature must be enabled on the access VLAN for that interface? A. C.1x port-based authentication is enabled.html QUESTION 129 Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic? A. If you are enabling IP source guard on a trunk interface with multiple VLANs and DHCP snooping is enabled on all the VLANs. Community VLAN--A community VLAN is a secondary VLAN that carries upstream traffic from the community ports to the promiscuous port and to other host ports in the same community. B. Drops invalid ARP packets. When IP source guard with source IP filtering is enabled on an interface.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs. Verifies that a packet has a valid IP-to-MAC address binding before updating the ARP cache or forwarding the packet. The ports within one community can communicate. DHCP snooping database dynamic ARP database dynamic routing database static ARP database Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Information About Dynamic ARP Inspection DAI is used to validate ARP requests and responses as follows: Intercepts all ARP requests and responses on untrusted ports. Reference: http://www. If you enter the ip source binding mac-address vlan vlan-id ip-address interface interface-id global configuration command on a routed interface. This database is built by DHCP snooping when it is enabled on the VLANs and on the device. You can enable this feature when 802.x_cg_chapter_01110.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15. and to other promiscuous ports. Each isolated VLAN can have several isolated ports. isolated VLAN primary VLAN community VLAN promiscuous VLAN Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Understanding Primary. D. Reference: http://www. D. DAI can determine the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a DHCP snooping binding database. C. and Community Private VLANs Primary VLANs and the two types of secondary VLANs (isolated and community) have these characteristics: Primary VLAN-. C.html QUESTION 127 Which database is used to determine the validity of an ARP packet based on a valid IP-to-MAC address binding? A. DHCP snooping must be enabled on the access VLAN for that interface . B. Reference: http://www. D. but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN.html QUESTION 128 When IP Source Guard with source IP filtering is enabled on an interface. and the traffic from each isolated port also remains completely separate. Isolated VLAN --An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. D. You can configure multiple isolated VLANs in a private VLAN domain. this error message appears: Static IP source binding can only be configured on switch port. all the traffic remains isolated within each one.http://www.com/c/en/us/td/docs/switches/datacenter/nexus1000/hyperv/sw/5_2_1_s_m_1_ 5_2/troubleshooting/configuration/guide/n1000v_troubleshooting/ n1000v_trouble_19dhcp. B. DHCP snooping storm control spanning-tree portfast 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.cisco. storm control port security VTP pruning VLAN trunking Correct Answer: A Section: Infrastructure Security Explanation .cisco.cisco.cisco.

router(config-if)#storm-control action shutdown router(config-if)#storm-control action trap router(config-if)#storm-control action error router(config-if)#storm-control action enable Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Configuring the Traffic Storm Control Shutdown Mode To configure the traffic storm control shutdown mode on an interface. Which option describes what this configuration allows? A.storm is detected? A. Reference: http://www. static trunk ports B. it is not recommended.1X and Port Security You can configure port security and 802.1X authenticates. B. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast. which creates excessive traffic and degrades network performance. It allows 802.1x authenticates. and added to the running configuration. you can configure MAC addresses to be sticky. and added to the running configuration? A. C.com/c/en/us/td/docs/routers/7600/ios/122SR/configuration/guide/swcg/do s.cisco. 802.cisco. D. B.2/25ew/configuration/guide/conf/port_sec.1x authenticates.1x to secure the IP address that port security authenticates. It allows 802. Reference:http://3c3cc. 802. sticky dynamic static secure Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: With port security.Explanation/Reference: Explanation: A traffic storm occurs when packets flood the LAN.1x on the same interface.com/c/en/us/td/docs/switches/lan/catalyst4500/12. B. perform this task: Reference: http://www.1x to secure the MAC address that port security authenticates. It allows port security to secure the IP address that 802.html QUESTION 132 Which feature describes MAC addresses that are dynamically learned or manually configured. If these addresses are saved in the configuration file. D.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack. Although sticky secure addresses can be manually configured.pdf QUESTION 133 On which interface can port security be configured? A.os/security/configuration/guide/sec_nx-os-cfg/sec_portsec. Port security secures the MAC addresses that 802. so when you enable both on an interface. It allows port security to secure the MAC address that 802.1X on the same interfaces. D. multicast. destination port for SPAN C.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx. Reference: http://www.1X is already preventing inbound traffic on the interface from unknown MAC addresses. the interface does not need to dynamically relearn them when the switch restarts.html QUESTION 131 A network engineer configures port security and 802. stored in the address table. C.cisco. These can be dynamically learned or manually configured. EtherChannel port group . Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: 802.pdf QUESTION 130 Which command would a network engineer apply to error-disable a switchport when a packet.2SX/configuration/guide/book/storm. C. stored in the address table.1X processes packets before port security processes them.

wikipedia. This port communicates only with P-Ports. Corporate polices do not allow layer 3 functionality to be enabled on the switches. .40. Community Port (C-Port): Connects to the regular host that resides on community VLAN. Packets from devices in the subnet of 172. which port type connects the switch to the gateway router? A. The device allows VLAN maximums only for VLANs associated with the trunk port. Host port further divides in two types Isolated port (I-Port) and Community port (C-port). DSW1 and ASW1. Promiscuous port (P-Port): The switch port connects to a router. In other words. 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.wikipedia. D. You have been tasked with implementing the above access control as a pre-condition to installing the servers. C. Authentication is to be done via a Radius server: Radius server host: 172. firewall or other common gateway device. On an access port. B.os/security/configuration/guide/sec_nx-os-cfg/sec_portsec.D. port security applies only to the access VLAN. 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. Trunk ports--You can configure port security on interfaces that you have configured as Layer 2 trunk ports. Ethernet Port Channels--Port security is not supported on Ethernet port channels. SPAN ports--You can configure port security on SPAN source ports but not on SPAN destination ports. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. Reference: http://en. Community Port (C-Port): Connects to the regular host that resides on community VLAN.46 Radius key: rad123 Authentication should be implemented as close to the host as possible. In other words. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server. VLAN maximums are not useful for access ports. This port communicates only with P-Ports. C.40.0/24. B. which type of port must you configure the gateway router port as? A. Host Ports: Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. This port communicates with P-Ports and ports on the same community VLAN. Reference: http://www. Promiscuous port (P-Port): The switch port connects to a router. The Radius server and application servers will be installed at a future date. This port communicates with P-Ports and ports on the same community VLAN. promiscuous port isolated port community port access port 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. firewall or other common gateway device. This port can communicate with anything else connected to the primary or any secondary VLAN. 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. 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 topology diagram indicates their layer 2 mapping.html QUESTION 134 When you configure private VLANs on a switch.120. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. This port can communicate with anything else connected to the primary or any secondary VLAN.0/24 should be allowed on VLAN 20. For security reasons. You must use the available IOS switch features.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx.cisco. D. Devices on VLAN 20 are restricted to the subnet of 172.org/wiki/Private_VLAN QUESTION 136 SIMULATION SWITCH.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches. Packets from devices in any other address range should be dropped on VLAN 20.120.120.40. Filtering should be implemented as close to the serverfarm as possible.org/wiki/Private_VLAN QUESTION 135 When you configure a private VLAN. Reference: http://en. Host Ports: Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. Host port further divides in two types Isolated port (I-Port) and Community port (C-port).

Correct Answer: Here is the solution below: Section: Infrastructure Security Explanation Explanation/Reference: The configuration: .

standby group standby priority backup interface standby track Correct Answer: D 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. its state changes do not affect the hot standby priority of the configured device.1_19_ea1/confi guration/guide/swhsrp.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 172.0.cisco.120. the hot standby priority on the device on which tracking has been configured decreases by 10.Step1: Console to ASW1 from PC console 1 ASW1(config)#aaa new-model ASW1(config)#radius-server host 172.0. B. B. D. For each interface configured for hot standby.html QUESTION 138 What is the default HSRP priority? A.com/en/US/docs/switches/lan/catalyst3550/software/release/12. If an interface is not tracked. C. Reference: http://www.120. 50 100 120 1024 Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: Explanation: .0 0.255 DSW1(config-ext-nacl)#exit DSW1(config)#vlan access-map PASS 10 DSW1(config-access-map)#match ip address 10 DSW1(config-access-map)#action forward DSW1(config-access-map)#exit DSW1(config)#vlan access-map PASS 20 DSW1(config-access-map)#action drop DSW1(config-access-map)#exit DSW1(config)#vlan filter PASS vlan-list 20 DSW1#copy run start QUESTION 137 Which configuration command ties the router hot standby priority to the availability of its interfaces? A. When a tracked interface fails. you can configure a separate list of interfaces to be tracked.39.40. D. C.

reduces cost simplifies configuration provides two independent supervisors with two different control planes removes the need for a First Hop Redundancy Protocol Correct Answer: D Section: Infrastructure Services Explanation Explanation/Reference: Explanation: First Hop Redundancy Protocols (FHRPs) such as VRRP and HSRP were designed to allow for a highly available first IP route hop for host systems.html QUESTION 140 Which First Hop Redundancy Protocol is an IEEE Standard? A.cisco. This VSS routing instance fulfills this first-hop role without the need for a dedicated protocol. D. C.com/en/US/docs/switches/lan/catalyst3550/software/release/12.Reference: http://www. The VSS system creates a single logical router at Layer 3. Reference: http://www. The VSS IP route is highly available due to MEC and the resiliency of the VSS system. B. 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: . C.html#wp1044327 QUESTION 139 Which option is a benefit of using VSS? A.cisco.1_19_ea1/confi guration/guide/swhsrp. B. FHRPs allow two (or more) distinct routers to share a common IP address providing a redundant Layer-3 default gateway for end nodes. D.com/en/US/docs/solutions/Enterprise/Data_Center/vssdc_integrate. VSS eliminates the need for FHRP at the aggregation layer of the data center.

comparison-2/ QUESTION 141 What is the default amount by which the hot standby priority for the router is decremented or incremented when the interface goes down or comes back up? .com/2008/08/23/router-high-availability-protocol.Reference: http://cciethebeginning.wordpress.

A VRRP Router may backup one or more virtual routers. Other members of the GLBP group learn the virtual MAC addresses from hello messages. Other group members provide backup for the AVG in the event that the AVG becomes unavailable. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN. If an interface is not tracked.html#wp1039651 QUESTION 143 Which gateway role is responsible for answering ARP requests for the virtual IP address in GLBP? A. B.1_19_ea1/confi guration/guide/swhsrp. Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. 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. C. For each interface configured for hot standby. When a tracked interface fails. C.html QUESTION 144 Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router? A. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses.com/en/US/docs/switches/lan/catalyst3550/software/release/12.A. the hot standby priority on the device on which tracking has been configured decreases by 10. you can configure a separate list of interfaces to be tracked. D. Reference: http://www. These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN. D. D.html QUESTION 142 What is the maximum number of virtual MAC addresses that GLBP allows per group? A. The AVG assigns a virtual MAC address to each member of the GLBP group. C.cisco. Gateways are assigned the next MAC address in sequence. C. It may participate in one or more virtual routers. 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. The AVG is responsible for assigning the virtual MAC addresses to each member of the group. B. Reference: http://www. B. virtual router master virtual router backup virtual router active virtual router standby Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: VRRP Definitions VRRP Router A router running the Virtual Router Redundancy Protocol. A virtual forwarder that has learned the virtual MAC address is referred to as a secondary virtual forwarder. The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address. B. A virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder. Reference: http://www. its state changes do not affect the hot standby priority of the configured device. .cisco. Other group members request a virtual MAC address after they discover the AVG through hello messages. D.cisco. 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.

When configuring the multicast boundary command. Which option describes the reason for this message in a GLBP configuration? A.102 and User Datagram Protocol (UDP) port 3222 (source and destination). VRRP advertisements are always sent using the primary IP address as the source of the IP packet.org/rfc/rfc3768. etc. In order to resolve this issue. 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. then it indicates that this router is receiving its own hello packets sent. The "standby follow" command configures an HSRP group to become a slave of another HSRP group.255.html QUESTION 147 Refer to the exhibit. 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. then some other device with a MAC address reports this error message. C. C.0.hsrp-mgo. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues.txt QUESTION 145 Which command correctly configures standby tracking for group 1 using the default decrement priority value? A. C. TCP connections. 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. 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. D.255. Reference: http://www. Verify the spanning-tree topology and check if there is any layer2 loop. issue the show interface command to verify the MAC address of the interface.0.0. Reference: http://www. random delay so that all client groups do not change at the same time. One possible selection algorithm is to always select the first address.0 15. QUESTION 146 Which command configures an HSRP group to become a slave of another HSRP group? A. HSRP client groups follow the master HSRP with a slight. when up. This is the router that. B. If the interface MAC address is different from the one reported in the error message. Note that if the IP address owner is available. Primary IP Address An IP address selected from the set of real interface addresses. B. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224. then it will always become the Master. permit the Multicast address by permit 224. There is no need to explicitly state the value if the desired value is the default value.IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address(es’. will respond to packets addressed to one of these IP addresses for ICMP pings. Reference: .0. If the MAC address of the interface is the same as the one reported in the error message.com/en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp. and answering ARP requests for these IP addresses. B. D.cisco.255. D.ietf.

· DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 · DSW2 . Currently all interfaces are up. with an enterprise network (access. is a medium sized company. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.com/en/US/products/hw/switches/ps708/products_configuration_example0918 6a00807d2520. Using the running configurations and show commands.http://www. . you have been asked to investigate and respond to the following question.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. Inc. Troubleshooting has identified several issues.shtml#dr QUESTION 148 Ferris Plastics.cisco. unless GigabitEthernet1/0/1 on backup device has also failed.

The distribution switches are configured to use HSRP to provide a high availability solution. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . decrease the priority value to avaluethatis less ` than the priority value configured in the VLAN 101 HSRP group on DSW2. you have been asked to investigate and respond to the following question. Using the running configurations and show commands. Enable preempt in the VLAN 101 HSRP group on DSW1. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: QUESTION 149 Ferris Plastics. Currently all interfaces are up. DSW1 did not become the active router for VLAN 101 as desired. B.During routine maintenance. Disable preempt in the VLAN 101 HSRP group on DSW2's. C.primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. DSW2 became the active HSRP device for VLAN 101 as desired. GigabitEthernet1/0/1 on DSW1 was shut down. unless GigabitEthernet1/0/1 on backup device has also failed. All other interfaces were up. after GigabitEthemet1/0/1 on DSW1 was reactivated. D. What needs to be done to make the group for VLAN 101 function properly? A. . Inc. is a medium sized company. However. 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. Troubleshooting has identified several issues. In the VLAN 101 HSRP group on DSW1. with an enterprise network (access.

it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1. You have determined that there is an issue with the decrement value in the track command for the VLAN 102 HSRP group. All other interfaces were up. What needs to be done to make the group function properly? .During routine maintenance. During this time. DSW1 remained the active device for the VLAN 102 HSRP group.

you have been asked to investigate and respond to the following question. Because 200 . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. is a medium sized company. . Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Use "show run" command to show. B. Troubleshooting has identified several issues. unless GigabitEthernet1/0/1 on backup device has also failed. with an enterprise network (access. Using the running configurations and show commands. Inc. C. The left Vlan102 is console1 of DS1. Currently all interfaces are up. QUESTION 150 Ferris Plastics. E. The distribution switches are configured to use HSRP to provide a high availability solution. The decrement value on DSW1 should be greaterthan 11 and less than 19. D.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 decrement value on DSWTs should be greaterthan 195 and less than 205.A. The decrement value on DSW1 should be greaterthan 5 and less than 15.11 = 189 < 190 (priority of Vlan102 on DS2). 0 The decrement value on DSW1 should be greaterthan 9 and less than 15. · DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 · DSW2 . The decrement value on DSWTs should be greaterthan 190 and less than 200. we should decrement value in the track command from 11 to 18. Priority value is 200.

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

DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Currently all interfaces are up.QUESTION 151 Ferris Plastics. with an enterprise network (access. you have been asked to investigate and respond to the following question. is a medium sized company. unless GigabitEthernet1/0/1 on backup device has also failed. Troubleshooting has identified several issues. Inc. . The distribution switches are configured to use HSRP to provide a high availability solution.primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. Using the running configurations and show commands.

C. It can not become active device when G1/0/1 on DS2 fail. you will make Vlan104's HSRP group fail function. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1 and DSW2. Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: We should NOT disable preempt on DS1.During routine maintenance.155 = 145. In this question. On DSW2 decrease the priority value to a value less than 150. is a medium sized company. Currently all interfaces are up. During this time. unless GigabitEthernet1/0/1 on backup device has also failed. The distribution switches are configured to use HSRP to provide a high availability solution. On DSW1. On DSW1. Vlan104 (left): 150 . Example: if we are disable preempt on DS1. If increase the decrement in the track value to a value greater than 6 (> or = 6). with an enterprise network (access. . On DSW1. Result is priority 144 < 145 (vlan104 on DS2 is active). QUESTION 152 Ferris Plastics. Using the running configurations and show commands.1 = 149. what can to be done to make the group function properly? A. decrease the decrement value in the track command to a value less than 1. Inc. Result is priority 149 > 145 (Vlan104 on DS1 is active). Vlan104 (right): 200 . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Troubleshooting has identified several issues. disable preempt. you have been asked to investigate and respond to the following question. All other interfaces were up. increase the decrement value in the track command to a value greater than 6. Vlan104 (left): 150 .6 = 144. G0/1/0 on DS1 & DS2 is shutdown. As related to the VLAN 104HSRP group. DSW1 became the active router for the VLAN 104HSRP group.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. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . By do that. B. D.

What is the priority value of the VLAN 105 HSRP group on DSW2? A. 50 .

200 Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Use "show standby brief" command on console2. Troubleshooting has identified several issues. Using the running configurations and show commands. 100 C. 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. Currently all interfaces are up. unless GigabitEthernet1/0/1 on backup device has also failed. QUESTION 153 Ferris Plastics. Very easy to se" priority of Vlan1"5 is 100. . you have been asked to investigate and respond to the following question. is a medium sized company. 150 D. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. with an enterprise network (access.B. Inc. The distribution switches are configured to use HSRP to provide a high availability solution.

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

They have questions about how these two devices will perform in the event of a device failure. .QUESTION 154 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.

16.0/24 subnet is being forwarded through R1? A.10. B.What percentage of the outgoing traffic from the 172. so all outgoing traffic will be forwarded to R1. C. D. R2-50% R2-100% R1-100% Correct Answer: D Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Based on the following output. R1-0% R1-50 %. . we see that R1 is the active standby router for the Ethernet 0/0 link.

.QUESTION 155 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.

D. which of the statement regarding HSRP priority is true? A. E.Refer to the exhibit. If router R1 interface Etherne0/0 goes down and recovers. The interface will have the priority decremented by 40 for HSRP group 1. The interface will have the priority decremented by 60 for HSRP group 1 The interface will have its current priority incremented by 40 for HSRP group 1 The interface will have its current priority incremented by 60 for HSRP group 1 The interface will default to the a priority of 100 for HSRP group 1 Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Here is the HSRP configuration seen on R1: . B. C.

it will then increment it by 40 back to 130 for HSRP group 1. when the Ethernet 0/0 interface goes down. when it comes back up. They have questions about how these two devices will perform in the event of a device failure. However. . QUESTION 156 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.Here. the standby 1 track decrement command will lower the priority from 130 to 90.

D. B. 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: Based on the configuration output. but not on R1: . C. E.What issue is causing Router R1 and R2 to both be displayed as the HSRP active router for group 2? A. we see that authentication is configured on R2.

QUESTION 157 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. They have questions about how these two devices will perform in the event of a device failure.This can be further verified by issuing the "show standby" command on each router. .

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E.0010 as shown below: .ac01 4000.ac01 4000.0c07.0000. 0000.What is the virtual mac-address of HSRP group 1? A.ac02 4000.0010 0000.0c07. B. D.0000.0000.0000. F. C.0010 Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Issuing the "show standby" command on either router shows us that the virtual MAC used by HSRP group 1 is 4000.ac02 0000.0c07.

The local switch is overloaded with the amount of sourced traffic that must be replicated to the remote switch. D. Which type of misconfiguration is a cause? A. however. E. 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 160 RSPAN has been configured on a Cisco Catalyst switch. F. D. The RSPAN designated VLAN is missing the remote span command. B. Which command can prevent BPDU transmission on this port? A. Correct Answer: A Section: Mix QUESTIONS Explanation . spanning-tree portfast bpduguard enable spanning-tree bpduguard default spanning-tree portfast bpdufilter default no spanning-tree link-type shared Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 159 Which four LACP components are used to determine which hot-standby links become active after an interface failure within an EtherChannel bundle? (Choose four. B.QUESTION 158 Refer to the exhibit. C. When troubleshooting a network problem. C.) A. The local RSPAN switch is replicating only Rx traffic to the remote switch. D. a network analyzer is connected to Port f0/1 of a LAN switch. G. C. B. traffic is not being replicated to the remote switch. The local and remote RSPAN switches are configured using different session IDs.

Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 162 To follow the Layer 2 switching guidelines. a Network Administrator noticed that one port stops receiving UDLD packets. E. The port then transitions into the errdisable state. Configure a SPAN session to monitor the received traffic on interface g0/5 for all VLANs except VLAN 3. E. Configure a SPAN session to monitor the received traffic on interface g0/4 for all VLANs except VLAN 3. D. end user connectivity is still required. UDLD port is configured in aggressive mode. B. D. B. UDLD timers are inconsistent. C. Which option describes what causes the port to go into the errdisable state? A. C. UDLD is enabled globally. Configure a SPAN session to monitor the received traffic on interface g0/4 only for VLAN 3. This port continues to reestablish until after eight failed retries. B. D. The engineer does not want this switch participating in Spanning Tree with the rest of the network. B. Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: . Which version of spanning tree is appropriate to meet the company policy? A. C. MST PVST+ RSTP RPVST+ STP Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 163 A network engineer is installing a switch for temporary workers to connect to. Configure a SPAN session to monitor the received traffic on interface g0/5 only for VLAN 3. a network engineer decides to create a separate spanning tree for every group of 10 VLANs. however. Normal UDLD operations that prevent traffic loops. BPDUblock BPDUfilter BPDUignore BPDUguard BPDUdisable Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 164 Refer to the exhibit. What is the result of the SPAN configuration on a Cisco switch? A. D. Which spanning-tree feature accomplishes this? A.Explanation/Reference: QUESTION 161 After UDLD is implemented. C.