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300-115.examcollection.premium.exam.

191q
Number: 300-115
Passing Score: 800
Time Limit: 120 min
File Version: 10.0

300-115
Implementing Cisco IP Switched Networks
Version 10.0

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_c67722110.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. Table 5-1 lists the events that occur when the switch stack compares the
provisioned configuration with the provisioned switch.

cisco.Reference: http://www.html QUESTION 3 .com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/122_55_se/configuration/guide/3750xscg/swstack.

D. 0 25 50 75 100 Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Physical Sequential Linkage The switches are physically connected sequentially. B. Cisco StackWise Technology Resilient Cabling Reference: http://www.com/c/en/us/products/collateral/switches/catalyst-3750-series-switches/ prod_white_paper09186a00801b096a. Figure 3.cisco. A break in any one of the cables will result in the stack bandwidth being reduced to half of its full capacity. E. as shown in Figure 3. .html QUESTION 4 Refer to the exhibit. Subsecond timing mechanisms detect traffic problems and immediately institute failover.What percentage of bandwidth is reduced when a stack cable is broken? A. This mechanism restores dual path flow when the timing mechanisms detect renewed activity on the cable. C.

switch1 channel-group 1 mode on switch2 channel-group 1 mode auto D. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode passive C.Which set of configurations will result in all ports on both switches successfully bundling into an EtherChannel? A. switch1 channel-group 1 mode active switch2 channel-group 1 mode auto B. 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: .

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.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-1_13_ea1/ configuration/guide/3550scg/swethchl. 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. Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible. 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. for Layer 2 EtherChannels. 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? . trunking state and VLAN numbers. For example: An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode.html QUESTION 5 Refer to the exhibit. Reference: http://www. An interface in the auto mode can form an EtherChannel with another interface in the desirable mode.cisco.

A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination B.cisco. C. use the monitor session filter global configuration command. 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. A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. all VLANs are monitored on trunk source ports. VLAN filtering cannot be enabled. If a VLAN is a source. B. D.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/ network_management/command_reference/b_nm_3se_3850_cr/ b_nm_3se_3850_cr_chapter_010.) A. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three. If you specify a series of VLANs.html#wp3875419997 QUESTION 6 Refer to the exhibit. A remote SPAN VLAN on the distribution and access layer switch . or to limit (filter) SPAN source traffic to specific VLANs. VLAN filtering refers to analyzing network traffic on a selected set of VLANs on trunk source ports. If you specify a range of VLANs. By default. VLAN monitoring and VLAN filtering are mutually exclusive. 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. Usage Guidelines You can set a combined maximum of two local SPAN sessions and RSPAN source sessions. Change the monitor session source to VLAN 10 instead of the physical interface. Apply the monitor session filter globally to allow only traffic from VLAN 10. You can have a total of 66 SPAN and RSPAN sessions on a switch or switch stack. you must enter a space before and after the hyphen ( -). Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10. a VLAN cannot become a source. You can monitor traffic on a single VLAN or on a series or range of ports or VLANs. Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10. | -] options.A. You select a series or range of VLANs by using the [ . you must enter a space before and after the comma. Reference: http://www. If VLAN filtering is configured.

while Switch B is configured with channelgroup 1 mode desirable. Each RSPAN source switch must have either ports or VLANs as RSPAN sources. Here is a summary of the various etherchannel modes: . A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination E. D. The switch ports are not configured in trunking mode. and the other is using desirable. which is a PAGP mode. The destination is always a physical port. 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. source VLANs.cisco. Why is the EtherChannel bundle not working? A. RSPAN supports source ports.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/122_55_se/configuration/guide/3750xscg/swspan. 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. A monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination F. A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination D. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Here we have a situation where one switch is using active mode. SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a destination port for analysis. Switch A is configured with channel-group 1 mode active. The channel group identifier must be different for Switch A and Switch B. interface port channel 1 is in the down/down state. which is an LACP mode. B. C. LACP priority must be configured on both switches. You can not mix the LACP and PAGP protocols to form an etherchannel. Reference: http://www. The RSPAN traffic from the source ports or VLANs is copied into the RSPAN VLAN and forwarded over trunk ports carrying the RSPAN VLAN to a destination session monitoring the RSPAN VLAN. and destination ports on different switches (or different switch stacks). enabling remote monitoring of multiple switches across your network.html QUESTION 7 After an EtherChannel is configured between two Cisco switches.C. The switches are using mismatched EtherChannel negotiation modes.

com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. The network administrator noticed that only one of the EtherChannel links is being utilized to reach the web server. Enable Cisco Express Forwarding to allow for more effective traffic sharing over the EtherChannel bundle. Use of source addresses or IP addresses can result in a better load balance. This command is configured globally: monitor session 2 filter vlan 1 – 8. Use link-state tracking to allow for improved load balancing of traffic upon link failure to the server.cisco. since all traffic is going to the same web server). For example. if the traffic on a channel only goes to a single MAC address (which is the case in this example.html QUESTION 8 An EtherChannel bundle has been established between a Cisco switch and a corporate web server.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/ configuration/guide/scg_2960/swethchl. The mode you select applies to all EtherChannels that you configure on the switch. Disable spanning tree on all interfaces that are participating in the EtherChannel bundle. D. 39. 52 . Correct Answer: E Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: EtherChannel load balancing can use MAC addresses. What should be done on the Cisco switch to allow for better EtherChannel utilization to the corporate web server? A. use of the destination MAC address results in the choice of the same link in the channel each time. B. Use the option that provides the greatest variety in your configuration. destination mode.Reference: http://www. IP addresses. Adjust the EtherChannel load-balancing method based on destination IP addresses. or Layer 4 port numbers. Reference: http://www.cisco. and either source mode. E.html QUESTION 9 Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. C. Adjust the EtherChannel load-balancing method based on source IP addresses. or both.

The trunk’s native VLAN must be changed to something other than VLAN 1.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/25ew/configuration/guide/ conf/span.cisco. C. and 52 is replicated to the SPAN destination port. a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible. Even though multiple routing neighbors can be formed over a layer 2 network. All VLAN traffic is sent to the SPAN destination interface. QUESTION 11 After the implementation of several different types of switches from different vendors. C. 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. but it has several routing neighbor relationships. 9 Reference: http://www. Cisco Discovery Protocol advertisements are inconsistent between the local and remote devices. D. Filtering a trunked SPAN port effectively disables SPAN operations for all VLANs. 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 . Local Area Mobility Link Layer Discovery Protocol NetFlow Directed Response Protocol Correct Answer: B . CDP can be used to determine the physical topology. B. Cisco Express Forwarding is enabled locally.html/index. Traffic from VLAN 4 is not sent to the SPAN destination interface. E. Which vendor-neutral protocol could be used to resolve this issue? A. D. then each router will only have the single switch port that it connects to as its neighbor. IP routing is disabled on neighboring devices. B. 39.What is the result of the implemented command? A. 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. only the physical port that it connects to will be seen as a CDP neighbor. Traffic from VLANs 1 to 8. B.html#wp1066836 QUESTION 10 A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided. What would cause the output to show only the single neighbor? A. The engineer notices only a single neighbor that uses Cisco Discovery Protocol. but not necessarily the logical topology. D. The routers are connected via a Layer 2 switch.

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. D. The VTP domain name must match and it is case sensitive.shtml QUESTION 13 After implementing VTP.wikipedia. What should be configured for extended VLANs? A. All VLAN changes must be done on this switch in order to have them propagated to the VTP clients. If any password is set. and neighbors on an IEEE 802 local area network. principally wired Ethernet. Make sure that if EtherChannels are created between two switches. Make sure that no password is set between the server and client. C. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking. Enable VTP version 3.cisco. Make sure that the VLANs are active in all the devices. Reference: http://en. Reference: http://www.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. VTP authentication is required when using extended VLANs because of their ability to cause network instability. VTP does not support extended VLANs and should be manually added to all switches. B. and version. such as the Cisco Discovery Protocol (CDP). make sure that the password is the same on both sides. only Layer 2 EtherChannels propagate VLAN information. D. What must be done to fix this? A. Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name.org/wiki/Link_Layer_Discovery_Protocol QUESTION 12 Several new switches have been added to the existing network as VTP clients. All of the new switches have been configured with the same VTP domain. Configure a different native VLAN on all new switches that are configured as VTP clients. which supports extended VLAN propagation. There are several reasons why the VLAN information can fail to be exchanged. Ensure that all switches run the same Cisco IOS version. LLDP performs functions similar to several proprietary protocols. Provision one of the new switches to be the VTP server and duplicate information from the existing network. One of the switches must be the VTP server in a VTP domain. capabilities. However. Extended VLANs will not propagate to different IOS versions when extended VLANs are in use. . C. VTP allows a consistent view of the switched network across all switches. 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. VLANs are not passing from the VTP server (existing network) to the VTP clients. Verify these items if switches that run VTP fail to exchange VLAN information: VTP information only passes through a trunk port. password. the extended VLANs are not being propagated to other VTP switches. CISCO and cisco are two different domain names.

A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP transparent switches do not participate in VTP. C.1SY/config_guide/sup2T/vtp. The trunk between Switch A and Switch B is misconfigured.Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP version 1 and VTP version 2 do not propagate configuration information for extended-range VLANs (VLAN numbers 1006 to 4094). while Switch C is configured with a trunk port to Switch B. . What is the most probable cause of this behavior? A. B. Switch B is configured in transparent mode.pdf QUESTION 14 Refer to the exhibit.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52. VTP version 3 supports extended-range VLANs (VLAN numbers 1006 to 4094). Switch A. D.com/en/US/docs/switches/lan/catalyst6500/ios/15. Switch B is configured with an access port to Switch A. Reference: http://www. Switch C receives VLAN information from the VTP server Switch A. but transparent switches do forward VTP advertisements that they receive out their trunk ports in VTP Version 2. B.cisco. and C are trunked together and have been properly configured for VTP.shtml QUESTION 15 Refer to the exhibit. If you convert from VTP version 3 to VTP version 2. Reference: http://www.cisco. You must configure extended-range VLANs manually on each network device. The VTP revision number of the Switch B is higher than that of Switch A. the VLANs in the range 1006 to 4094 are removed from VTP control. but Switch B does not receive any VLAN information.

Without VTP pruning. and unknown unicast traffic across all trunk links within a VTP domain even though receiving switches might discard them. and C are trunked together and have been properly configured for VTP. The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco Catalyst switches. a switch floods broadcast. The VTP revision number of Switch B is higher than that of Switch A. IEEE 802. D. RSTP bridge port roles: * Root port – A forwarding port that is the closest to the root bridge in terms of path cost * Designated port – A forwarding port for every LAN segment .Switch A. VTP pruning is disabled by default. B. C. VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface that is connected to Switch C. but Switch C is not receiving traffic from certain VLANs. The new switches are using RSTP instead of legacy IEEE 802. the network engineer notices that the port roles that were once “blocking” are now defined as “alternate” and “backup.1D STP. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP pruning increases network available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to reach the destination devices. The trunk between Switch A and Switch B is misconfigured. What would cause this issue? A. B. VTP pruning blocks unneeded flooded traffic to VLANs on trunk ports that are included in the pruning-eligible list. Switch B has all VLANs.” What is the reason for this change? A. C. D. is that VTP pruning has been configured. QUESTION 16 After the recent upgrade of the switching infrastructure. multicast. 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.1D STP and PortFast have been configured by default on all newly implemented Cisco Catalyst switches. These ports are allowed to immediately enter the forwarding state rather than passively wait for the network to converge. A VTP authentication mismatch occurred between Switch A and Switch B. The best explanation for why switch C is not seeing traffic from only some of the VLANs. The administrator has defined the switch as the root in the STP domain. B.

while a half-duplex port is considered as a shared port by default. This makes them candidates for rapid transition to the forwarding state. Reference: http://www.html QUESTION 17 An administrator recently configured all ports for rapid transition using PortFast. D.cisco. such as broadcast. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: RSTP can only achieve rapid transition to the forwarding state on edge ports and on point-to-point links. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/ book/vtp. The switch does not have the processing power to ensure rapid transition for all ports. What is the reason for this? A. unknown. a network administrator can manually disable a port Reference: http://www.cisco. In switched networks today. * Backup port – A backup/redundant path to a segment where another bridge port already connects. The alternative port moves to the forwarding state if there is a failure on the designated port for the segment. The backup port applies only when a single switch has two links to the same segment (collision domain). By default. A port that operates in fullduplex is assumed to be point-to-point.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146. * Disabled port – Not strictly part of STP. not on trunk links. RSTP has been enabled per interface and not globally.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146. multicast. C. This automatic link type setting can be overridden by explicit configuration. it has been determined that several ports are not transitioning as they should. This path is different than using the root port.cisco. The link type is automatically derived from the duplex mode of a port. STP is unable to achieve rapid transition for trunk links. C. B. VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices. After testing. D. and flooded unicast packets to only the switches that require it. B.* Alternate port – A best alternate path to the root bridge. Reference: http://www. the switch must be attached to a hub. To have two links to the same collision domain. most links operate in full-duplex mode and are treated as point-to-point links by RSTP. access lists DTP in nonegotiate VTP pruning PBR Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic.html#wp1020444 QUESTION 19 What effect does the mac address-table aging-time 180 command have on the MAC address-table? . VTP pruning is disabled.html QUESTION 18 Which technique automatically limits VLAN traffic to only the switches that require it? A.

To configure the aging time for all MAC addresses. The MAC address-table will be flushed every 3 minutes. the link did not recover. C. This is how long a dynamic MAC address will remain in the CAM table.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/MACAddress. The default timeout period will be 360 seconds.A. D. After the damaged cable was replaced. What solution allows the network switch to automatically recover from such an issue? A. As designed. 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. 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.cisco. B. D. E. The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes. E. a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber. B. macros errdisable autorecovery IP Event Dampening command aliases Bidirectional Forwarding Detection Correct Answer: B Section: Layer 2 Technologies . the link was placed into a non-forwarding state due to a fault with UDLD. C. ARP requests will be processed less frequently by the switch.html#wp1126206 QUESTION 20 While working in the core network building.

By default. What is a cause for this issue? A. Reference: http://www. C. This is where errdisable autorecovery can be of great assistance. but not a destination. The port channel can be used as a SPAN source. and (ideally) correct the issue. SPAN encapsulation replication must be enabled to capture EtherChannel destination traffic. If the boundary is exceeded.cisco. There is no way to edit template category individual values. UDLD failure. We can configure the switch to automatically re-enable any error-disabled interfaces after a specified timeout period. However. assess. manual intervention by an administrator is necessary to restore the interface to working order. as opposed to the original access control entries (ACEs) configured by the user. Reference: http://packetlife. C.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/44921swdatabase-3750ss-44921. such as the detection of a loopback. VLAN filters are required to ensure traffic mirrors effectively. The first eight lines (up to Security ACEs) represent approximate hardware boundaries set when a template is used. this can be done by issuing shutdown followed by no shutdown on the interface. generate the number of TCAM entries listed for security and QoS ACEs. B. . some configurations may be prone to accidental violations. The idea behind requiring administrative action is so that a human engineer can intercede. B.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. RSPAN must be used to capture EtherChannel bidirectional traffic. The SDM template is causing the CPU of the switch to spike during peak working hours. After configuring SPAN to monitor this port. Choosing the VLAN template will actually disable routing (number of entry for unicast or multicast route is zero) in hardware. The VLAN receives additional frames from neighboring switches. D. The VLAN template disables routing in hardware.html QUESTION 22 An access switch has been configured with an EtherChannel port. the network administrator notices that not all traffic is being replicated to the management server. What is the root cause of this issue? A. by removing an unapproved device) without the need for administrative intervention. all processing overflow is sent to the CPU which can have a major impact on the performance of the switch. This gives the offending issue a chance to be cleared by the user (for example. and a steady recurrence of these can amount to a huge time sink for the administrative staff. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: SDM Template Notes: All templates are predefined. D. The ACL merge algorithm. The switch needs to be rebooted before the SDM template takes effect. The switch reload is required to use a new SDM template.Explanation Explanation/Reference: Explanation: There are a number of events which can disable a link on a Catalyst switch. or a broadcast storm. The SDM VLAN template causes the MAC address-table to overflow.

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. You can configure both
Layer 2 and Layer 3 ports and EtherChannels as SPAN sources. SPAN can monitor one or more source ports
or EtherChannels in a single SPAN session. You can configure ports or EtherChannels in any VLAN as SPAN
sources. Trunk ports or EtherChannels can be configured as sources and mixed with nontrunk sources. A portchannel interface (an EtherChannel) can be a SPAN source, but not a destination.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/
book/span.html#wp1040905
QUESTION 23
Refer to the exhibit.

What is the result of the configuration?
A. The EtherChannels would not form because the load-balancing method must match on the devices.
B. The EtherChannels would form and function properly even though the load-balancing and EtherChannel
modes do not match.
C. The EtherChannels would form, but network loops would occur because the load-balancing methods do
not match.
D. The EtherChannels would form and both devices would use the dst-ip load-balancing method because
Switch1 is configured with EtherChannel mode active.
Correct Answer: B
Section: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:

An etherchannel will form if one end is active and the other is passive. The table below summarizes the results
for LACP channel establishment based on the configuration of each side of a link:
LACP Channel Establishment

Load balancing can only be configured globally. As a result, all channels (manually configured, PagP, or
LACP) use the same load-balancing. This is true for the switch globally, although each switch involved in the
etherchannel can have non matching parameters for load balancing.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/54sg/configuration/guide/
config/channel.html#wp1020804
QUESTION 24
A network engineer tries to configure storm control on an EtherChannel bundle. What is the result of the
configuration?
A.
B.
C.
D.

The storm control settings will appear on the EtherChannel, but not on the associated physical ports.
The configuration will be rejected because storm control is not supported for EtherChannel.
The storm control configuration will be accepted, but will only be present on the physical interfaces.
The settings will be applied to the EtherChannel bundle and all associated physical interfaces.

Correct Answer: D
Section: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:
After you configure an EtherChannel, any configuration that you apply to the port-channel interface affects the
EtherChannel; any configuration that you apply to the physical interfaces affects only the interface where you
apply the configuration.
Storm Control is an exception to this rule. For example, you cannot configure Storm Control on some of the
members of an EtherChannel; Storm Control must be configured on all or none of the ports. If you configure
Storm Control on only some of the ports, those ports will be dropped from the EtherChannel interface (put in
suspended state). Therefore, you should configure Storm Control at the EtherChannel Interface level, and not
at the physical interface level.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/31sg/configuration/guide/
conf/channel.html
QUESTION 25
What is the function of NSF?
A.
B.
C.
D.

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, increasing operational efficiency, boosting nonstop communications, and scaling system
bandwidth capacity to 1.4 Tbps. Switches would operate as a single logical virtual switch called a virtual
switching system 1440 (VSS1440). VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual
Switching Supervisor 720-10GE.
In a VSS, 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, combining for an active 1400-Gbps switching capacity per VSS. Only
one of the virtual switch members has the active control plane. Both chassis are kept in sync with the interchassis 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.
Reference: http://ciscorouterswitch.over-blog.com/article-cisco-catalyst-6500-series-vss-1440-124536783.html
QUESTION 26
After UDLD is implemented, a Network Administrator noticed that one port stops receiving UDLD packets. This
port continues to reestablish until after eight failed retries. The port then transitions into the errdisable state.
Which option describes what causes the port to go into the errdisable state?
A.
B.
C.
D.

Normal UDLD operations that prevent traffic loops.
UDLD port is configured in aggressive mode.
UDLD is enabled globally.
UDLD timers are inconsistent.

Correct Answer: B
Section: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:
With UDLD aggressive mode enabled, when a port on a bidirectional link that has a UDLD neighbor
relationship established stops receiving UDLD packets, UDLD tries to reestablish the connection with the
neighbor. After eight failed retries, the port is disabled.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/
book/udld.html
QUESTION 27
After reviewing UDLD status on switch ports, an engineer notices that the.” Which statement describes what
this indicates about the status of the port?
A. The port is fully operational and no known issues are detected.
B. 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. UDLD moved into aggressive mode after inconsistent acknowledgements were detected.
D. The UDLD port is placed in the “unknown” state for 5 seconds until the next UDLD packet is received on
the interface.
Correct Answer: A
Section: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:

STP immediately replaces the root port with an alternative root port. port-priority cost forward-timers link type root guard Correct Answer: AB Section: Layer 2 Technologies Explanation Explanation/Reference: .html QUESTION 29 A network engineer must adjust the STP interface attributes to influence root port selection. We can enable UDLD globally on the device. D. only one of which is forwarding at any given time. the status will transition to bidirectional. E. The port will remain operational during this time. as it would with the normal spanning-tree procedures. C. PVST+ PortFast BackboneFast UplinkFast Loop Guard UDLD Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: I f a switch loses connectivity.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/ configuration/guide/scg_2960/swstpopt.By default. Reference: http://packetlife. UDLD is disabled on all interfaces. which is not necessarily an error condition. An uplink group is a set of Layer 2 interfaces (per VLAN). you can accelerate the choice of a new root port when a link or switch fails or when the spanning tree reconfigures itself. B. it begins using the alternate paths as soon as the spanning tree selects a new root port. By enabling UplinkFast with the spanning-tree uplinkfast global configuration command. C. Which spanning-tree technology is used to accomplish backup root port selection? A. an uplink group consists of the root port (which is forwarding) and a set of blocked ports. This enables UDLD in normal mode. UplinkFast provides fast convergence after a direct link failure and achieves load balancing between redundant Layer 2 links using uplink groups. F. or individually on specific interfaces with the command udld port. Specifically. B. D. except for self-looping ports. It would be prohibitively difficult to coordinate the configuration of UDLD on both ends of a link at the same time. Reference: http://www. E.) A. The root port transitions to the forwarding state immediately without going through the listening and learning states. so when UDLD is first enabled and does not detect a neighbor the link state is considered unknown.net/blog/2011/mar/7/udld/ QUESTION 28 Pilot testing of the new switching infrastructure finds that when the root port is lost.cisco. When UDLD is finally enabled on the other end. The uplink group provides an alternate path in case the currently forwarding link fails. Which two elements are used to accomplish this? (Choose two.

Adjust the switch SDM back to “default”. The mode applies to all EtherChannels that are configured on the switch. C. Reference: http://www. B. The path cost value represents the media speed. at regular intervals. BPDUs contain information about the sending switch and its ports. Upgrade the PFC to support the latest load balancing methods. the spanning-tree algorithm recalculates the spanning-tree topology and activates the standby path. Configure the new load balancing method using port-channel load-balance. . Switches send and receive spanning-tree frames. switch priority. 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. Which action must be done to apply a new load balancing method? A. 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. and path cost. If a network segment in the spanning tree fails and a redundant path exists. Ensure that IP CEF is enabled globally to support all load balancing methods. called bridge protocol data units (BPDUs).html QUESTION 30 A network engineer must set the load balance method on an existing port channel. The switches do not forward these frames but use them to construct a loop-free path. port priority. EtherChannel load balancing can use MAC addresses or IP addresses.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/122_55_se/configuration/guide/3750xscg/swstp.Explanation: Spanning tree forces redundant data paths into a standby (blocked) state. Reference: http://www.cisco. D. or both source and destination addresses. 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. source or destination addresses.html QUESTION 31 Refer to the exhibit. 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 spanning-tree port priority value represents the location of a port in the network topology and how well it is located to pass traffic. When two ports on a switch are part of a loop.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. including switch and MAC addresses.cisco.

What is causing the line protocol on this interface to be shown as down? A. 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. C. There is a duplex mismatch on the interface. CDP Version 2 — This is the most recent version of CDP which has enhanced features such as rapid reporting mechanism. which is used to track down errors and minimize costly downtime. The interface is configured as the source of the SPAN session.com/CiscoSB/GetArticle. Cisco Discovery Protocol version 2 Cisco IOS Embedded Event Manager logging buffered Cisco Discovery Protocol source interface Cisco Discovery Protocol logging options Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: CDP Version 1 — This is the first version of CDP which was used for the discovery of Cisco devices in the network. VTP pruning B. Reference: http://sbkb. E. It allows you to track instances even if the native VLAN ID or port duplex states do not match between connecting devices. D. it is found that rapid error tracking is not currently enabled. the state of the destination port is up/down by design.shtml QUESTION 32 While doing network discovery using Cisco Discovery Protocol. D.cisco.xml&pid=2&converted=0 QUESTION 33 Which technique allows specific VLANs to be strictly permitted by the administrator? A. B. Reference: http://www. C.A network engineer investigates a recent network failure and notices that one of the interfaces on the switch is still down.cisco. B. There is a layer 1 physical issue. transparent bridging C.com/en/US/products/hw/switches/ps708/ products_tech_note09186a008015c612. There is a speed mismatch on the interface. This is the normal operational state for SPAN destinations. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: With the SAPN destination port. The interface is configured as the target of the SPAN session.aspx? docid=0ed03cbac49b446ab390a657917d817c_Cisco_Discovery_Protocol_CDP__Properties_Settings_on_Sx 500_S. This is the default version on all switches. E. trunk allowed VLANs . This version is mainly used for backward compatibility. Which option must be enabled to allow for enhanced reporting mechanisms using Cisco Discovery Protocol? A.

are allowed on each trunk. configure “switchport nonegotiate. D.cisco.1_13_ea1/ configuration/guide/swvlan.D. C. Enable switchport block on access ports. E. preventing traffic from those VLANs from passing over the trunk. PPP DTP ISL HDLC DLCI DOT1Q Correct Answer: CF Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: .com/articles/article. Apply BPDU guard and BPDU filter. a trunk port sends traffic to and receives traffic from all VLANs. 1 to 4094. Which two actions can prevent interface trunking? (Choose two.) A.” This prevents the interface from generating DTP frames. Reference: http://www. F. You must manually configure the neighboring interface as a trunk interface to establish a trunk link. otherwise the link will be a non-trunking link. You can use this command only when the interface switchport mode is access or trunk. but may be disabled. C. To disable DTP. Disable DTP on a per interface basis. use the “switchport trunk allowed vlan remove vlan-list” interface configuration command to remove specific VLANs from the allowed list. B. Reference: http://www. you can remove VLANs from the allowed list. VLAN access-list E. DTP causes increased traffic.asp?p=2181837&seqNum=8 QUESTION 35 Which two protocols can be automatically negotiated between switches for trunking? (Choose two. the IT manager has prohibited users from dynamically establishing trunks with their associated upstream switch. L2P tunneling Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: By default. However. Configure trunk and access interfaces manually. B. D. and is enabled by default. Correct Answer: AB Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The Dynamic Trunking Protocol (DTP) is used to negotiate forming a trunk between two Cisco devices. All VLAN IDs.html QUESTION 34 For security reasons.) A. To restrict the traffic a trunk carries.ciscopress.com/en/US/docs/switches/lan/catalyst3550/software/release/12.

Reload the VTP server.1Q or ISL trunking encapsulation. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing the extended LAN . C. you can directly configure the password secret key. B. The VTP server must be reloaded. E. C. After verifying all VTP settings. Support for extended range VLAN (VLANs 1006 to 4094) database propagation. Instead. the secret key from the password string is saved in the VLAN database file.PDF QUESTION 36 A network is running VTPv2. Which action resolves this problem? A. Verify connected trunk ports. If extended VLANs are configured. a network engineer notices that none of the VTP clients are receiving the updates.2_52_se/ configuration/guide/swvtp. the key associated with the password is saved in hexadecimal format in the running configuration. the switchport trunk encapsulation [dot1q | isl | negotiate] interface command must be used prior to the switchport mode trunk command. Reference: http://www. but it does not appear in plain text in the configuration. you cannot convert from VTP version 3 to version 1 or 2. Restart the VTP process on the new switch.com/servlet/JiveServlet/previewBody/14792-102-1-57313/Dynamic% 20Trunking%20Protocol. The VTP version number must be set to version 3. Another switch in the domain has a higher revision number than the server. VTP must be stopped and restarted on the server.Switches such as the Catalyst 3550 that are capable of either 802.com/en/US/docs/switches/lan/catalyst3560/software/release/12. the network engineer notices that the new switch is not receiving the list of VLANs from the server. What is the problem? A. B. You must reenter the password if you enter a takeover command in the domain. After each update to the VTP server.cisco.html#wp1316856 QUESTION 38 A network engineer is extending a LAN segment between two geographically separated data centers. Reference: https://learningnetwork. it takes up to 4 hours propagate. The first thing that should be done is to verify that the trunk ports are connected and up. VTP versions 1 and 2 propagate only VLANs 1 to 1005.cisco. D. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP should never need to have the switch reloaded or the VTP process to restart in order for it to work. D. Reload the new switch. 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. QUESTION 37 After configuring new data VLANs 1020 through 1030 on the VTP server. When hidden. When you enter the secret keyword.

C. E. how many VLANs can be used to carry user traffic? A.30 is issued. D. B. Since the question asked for the choice that is an enhancement to the STP design. the method runs the pruned VLAN on trunks. The command effectively removed all other working VLANs and replaced them with the new VLANs. or use the “issue the switchport trunk allowed vlan add vlan-list” command instead to add these 3 VLANS to the other defined allowed VLANs. You would also need to explicitly allow the other working VLANs to this configuration command. 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. Instead. Use VTP pruning on the trunk interfaces. B. D.cisco. Create a Layer 3 transit VLAN to segment the traffic between the sites. VTP pruning is the best choice. C. Reference: http://www. VTP-pruned VLANs on a trunk are still part of the spanning tree. What is the root cause of the problem? A.shtml QUESTION 39 The network manager has requested that several new VLANs (VLAN 10. all other existing VLANs no longer pass traffic over the trunk.segment? A. Modify the spanning-tree priorities to dictate the traffic flow. After the command switchport trunk allowed vlan 10. ISL was unable to encapsulate more than the already permitted VLANs across the trunk. VTP pruning—Avoid this method if the goal is to reduce the number of STP instances.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. and it avoids the use of the spanning tree. Therefore. 1000 1001 1024 2048 4095 . B. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The “switchport trunk allowed vlan” command will only allow the specified VLANs. and 30) are allowed to traverse the switch trunk interface. Reference: https://supportforums. C. VTP-pruned VLANs do not reduce the number of spanning tree port instances.20.com/document/11836/how-define-vlans-allowed-trunk-link QUESTION 40 When you design a switched network using VTPv2. and overwrite any others that were previously defined. Configure manual trunk pruning between the two locations. 20. D. VTP pruning removed all unused VLANs.cisco. Allowing additional VLANs across the trunk introduced a loop in the network.

except when the native VLAN is set to 1. B. with the defined native VLAN. 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. 4096 Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP versions 1 and 2 Supports normal VLAN numbers (1-1001). such as the Cisco Discovery Protocol (CDP). C. Reference: http://en. Control traffic is tagged. 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. C.F.wikipedia. It allows control traffic to pass using the non-default VLAN.com/2012/11/difference-between-vtp-versions. Only VTP version 3 supports extended VLANs (1-4095). capabilities. B. and neighbors on an IEEE 802 local area network. principally wired Ethernet. D.org/wiki/Link_Layer_Discovery_Protocol QUESTION 43 A manager tells the network engineer to permit only certain VLANs across a specific trunk interface.html QUESTION 41 What does the command vlan dot1q tag native accomplish when configured under global configuration? A. so the open standard protocol must be configured. Cisco Discovery Protocol is not supported. Which protocol does the network engineer configure on both devices to accomplish this? A. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: The “vlan dot1q tag native” will tag all untagged frames. D. LLDP performs functions similar to several proprietary protocols. Which option can be configured to accomplish this? .blogspot. It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s). including control traffic. Reference: http://cciememo. All frames within the native VLAN are tagged.

Example configuration: Switch-C# configure terminal Switch-C(config)# interface range fa0/3 . C. D. all of the configured VLANs are allowed to send and receive traffic across the link. issue the switchport trunk vlan-Iist interface configuration command. enable the STP PortFast feature.24 Switch-C(config-if-range)# sp–nning-tree portfast Reference: http://www. VLANs 1 through 1005 are allowed on each trunk by default. the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state. Note: The allowed VLAN list on both the ends of the trunk link should be the same. B.com/document/11836/how-define-vlans-allowed-trunk-link QUESTION 44 For client server failover purposes.A. C. 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. B. B.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. This removes specific VLANs from the allowed list. they require the switchport to enter a forwarding state immediately. perform these steps: 1. PortFast immediately transitions the port into STP forwarding mode upon linkup. Reference: https://supportforums. E. D. Rapid Spanning-Tree Spanning-Tree Timers Spanning-Tree FastPort Spanning-Tree PortFast Spanning-Tree Fast Forward Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: In order to allow immediate transition of the port into forwarding state.cisco. So if the port is to be a part of the loop. The port still participates in STP.com/library/content. For Integrated Cisco IOS Software based switches. However. Which spanningtree feature satisfies this requirement? A. D. the port eventually transitions into STP blocking mode. VLAN traffic can be removed from the allowed list. switch# show spanning-tree vlan 10 switch# show spanning-tree bridge switch# show spanning-tree brief switch# show spanning-tree summary . C. This keeps traffic from the VLANs from passing over the trunk link. For their disaster recovery feature to operate successfully.informit. To restrict the traffic that a trInk carries.

Nbr -------128. a switch will have a domain name of NULL and no password. All other switches with the default domain name become VTP clients.232 Type --------------------------P2p P2p Reference: http://www. and the configuration revision number. Contained in a summary advertisement: VTP version .cisco. C. which statement describes what happens when“a do”ain name is configured on one of the switches? A.E.f2d2. D.216 128. If all switches currently have the default VTP domain name "null". If the switch hears a VTP advertisement it will automatically learn the VTP domain name. Summary advertisements – sent out every 300 seconds and every time a change occurs on the VLAN database. VTP summary advertisements are sent out of all ports with the new domain name.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2.9000 2 sec Max Age 20 sec Forward Delay 15 sec 300 sec Sts --FWD BLK Cost --------9 9 Prio. B.html QUESTION 46 A new network that consists of several switches has been connected together via trunking interfaces. VLANs. Switches with higher revisio“ num”ers does not accept the new domain name. The switch with the non-default domain name restores back to "null" upon reboot.57d8. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: By default. switch# show spanning-tree vlan 10 brief Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Example output: SW2#show spanning-tree vlan 10 VLAN0010 Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014.4180 Cost 9 Port 216 (Port-channel21) Hello Time 2 sec Max Age 20 sec Bridge ID Priority Address Hello Time Aging Time Interface ------------------Po21 Po23 Role ---Root Altn Forward Delay 15 sec 32778 (priority 32768 sys-id-ext 10) 001c.

uses a minimum number of STP instances to match the number of physical topologies present. each switch needs to maintain only two spanning trees. Rather than maintaining 1000 spanning trees. In this setup. D. B. reducing the need for switch resources. MST. depending on how the switch is used in the network. C. Which Spanning Tree Protocol should be used to reduce switch resources and managerial burdens that are associated with multiple spanning-tree instances? A. SDM templates are used to configure system resources in the switch to optimize support for specific features. Reference: http://ciscodocuments.com/2011/05/chapter-03-implementing-spanning-tree_19. featuring an access Switch A. The 1000 VLANs map to two MST instances. RSTP PVST MST PVST+ RPVST+ Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Multiple Spanning Tree (MST) extends the IEEE 802. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies.net/configuring-cisco-vtp/ QUESTION 47 A network engineer is setting up a new switched network. connected to two Building Distribution submodule Switches D1 and D2. Figure 3-15: VLAN Load Balancing Figure 3-15 illustrates two links and 1000 VLANs. E.html QUESTION 48 Which statement about the use of SDM templates in a Cisco switch is true? A. The network is expected to grow and add many new VLANs in the future.blogspot.dionicio.1w RST algorithm to multiple spanning trees. on the other hand. The main purpose of MST is to reduce the total number of spanning-tree instances to match the physical topology of the network and thus reduce the CPU cycles of a switch. Figure 3-15 shows a common network design. .Domain name Configuration revision number Time stamp MD5 encryption hash code Reference: https://rowell. and the network administrator typically seeks to achieve load balancing on the access switch uplinks based on even or odd VLANs—or any other scheme deemed appropriate. there are 1000 VLANs.

B. VLAN access default routing Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages. Default — The default template gives balance to all functions. VLAN .2_55_se/ configuration/guide/swsdm.cisco.cisco. You can select SDM templates to optimize these features: Access — The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs. SDM templates are used to configure ACLs that protect networks and specific hosts from unnecessary or unwanted traffic. the switch SDM templates prioritize system resources to optimize support for certain features.2_55_se/ configuration/guide/swsdm. and use access template to obtain maximum ACL usage.pdf QUESTION 49 Which SDM template disables routing and supports the maximum number of unicast MAC addresses? A. You can select a template to provide maximum system usage for some functions. the switch SDM templates prioritize system resources to optimize support for certain features. C.com/en/US/docs/switches/lan/catalyst3560/software/release/12. VLANs — The VLAN template disables routing and supports the maximum number of unicast MAC addresses.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. To allocate hardware resources for different usages.B. 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. Reference: http://www. Routing — The routing template maximizes system resources for Ipv4 unicast routing. Reference: http://www. 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. D. D.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12. It would typically be selected for a Layer 2 switch. for example. E. 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. C. depending on how the switch is used in the network. SDM templates are configured by accessing the switch using the web interface. use the default template to balance resources. typically required for a router or aggregator in the center of a network.

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.pdf QUESTION 51 In a Cisco switch. Reference: http://www.cisco. D.com/en/US/docs/switches/lan/catalyst3560/software/release/12. perform this task: Reference: http://www.2_55_se/ configuration/guide/swsdm. VLANs—The VLAN template disables routing and supports the maximum number of unicast MAC addresses (clients).html QUESTION 52 . access D. It would typically be selected for a Layer 2 switch. what is the default period of time after which a MAC address ages out and is discarded? A. typically required for a router or aggregator in the center of a network. the switch SDM templates prioritize system resources to optimize support for certain features. 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. Routing—The routing template maximizes system resources for Ipv4 unicast routing.B. routing Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages. default C. C. Default—The default template gives balance to all functions. B.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ MACAddress.

html QUESTION 53 Which option is a possible cause for an errdisabled interface? A.cisco.If a network engineer applies the command mac-address-table notification mac-move on a Cisco switch port. D. A new MAC address is added to the content-addressable memory. To disable MAC-move notification. Mac-address-table notification mac-move [counter [syslog]] no mac-address-table notification mac-move [counter [syslog]] Syntax Description Usage Guidelines MAC-move notification generates a syslog message whenever a MAC address or host moves between different switch ports. use the no form of this command. B. 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. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: mac-address-table notification mac-move To enable MAC-move notification. A new MAC address is removed from the content-addressable memory. C. C. Reference: http://www. 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 . More than 64 MAC addresses are added to the content-addressable memory. use the mac-address-table notification mac-move command in global configuration mode.com/en/US/docs/ios/lanswitch/command/reference/lsw_m1. when is a syslog message generated? A. A MAC address or host moves between different switch ports. D. B.

LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices. B. Reference: http://www.shtml QUESTION 55 Which statement about LLDP-MED is true? A. Issue the shutdown command and then the no shutdown interface mode command on the associated interface in order to manually reenable the ports. you must reenable the ports manually. C. . In this case. The show errdisable recovery command shows the default errordisable recovery state for all the possible conditions. B. the ports are still disabled if you have not configured errdisable recovery on the switch. D. The errdisable recovery command allows you to choose the type of errors that automatically reenable the ports after a specified amount of time. the timeout feature is disabled. 30 seconds 100 seconds 43sernads 600 seconds Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: After you fix the root problem. LLDP-MED is an extension to LLDP that operates only between network devices.shtml QUESTION 54 What is the default value for the errdisable recovery interval in a Cisco switch? A. cat6knative#show errdisable recovery ErrDisable Reason Timer Status ----------------.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.cisco.DHCP snooping rate-limit Incorrect GBIC / Small Form-Factor Pluggable (SFP) module or cable Address Resolution Protocol (ARP) inspection Inline power Reference: http://www.-------------udld Disabled bpduguard Disabled security-violatio Disabled channel-misconfig Disabled pagp-flap Disabled dtp-flap Disabled link-flap Disabled l2ptguard Disabled psecure-violation Disabled gbic-invalid Disabled dhcp-rate-limit Disabled mac-limit Disabled unicast-flood Disabled arp-inspection Disabled Timer interval: 300 seconds Interfaces that will be enabled at the next timeout: Note: The default timeout interval is 300 seconds and. by default.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.cisco.

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

html QUESTION 58 Which option describes a limitation of LLDP? A. B. LLDP does not support TLVs. LLDP can discover only Windows servers. LLDP cannot provide information about VTP.Reference: http://www. D.com/en/US/docs/ios/12_2/configfun/configuration/guide/fcf015. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: LLDP Versus Cisco Discovery Protocol TLV Comparison . C.cisco. LLDP can discover up to two devices per port.

capabilities. UDLD is a standardized Layer 2 protocol that enables devices to advertise their identity. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. capabilities. UDLD detects the existence of unidirectional links. D.cisco. 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.2SX/configuration/guide/ udld. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to advertise their identity. and neighbors on a local area network.html QUESTION 59 Which statement about the UDLD protocol is true? A. Reference: http://www. When a unidirectional link is detected.cisco. UDLD is a standardized Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures.Reference: http://www.html QUESTION 60 Which option lists the modes that are available for configuring UDLD on a Cisco switch? . B.com/en/US/technologies/tk652/tk701/ technologies_white_paper0900aecd804cd46d. C. 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.

UDLD detects the existence of unidirectional links. D. UDLD puts the affected port into the errdisabled state and alerts the user. D. by default. B. 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.cisco. B. Devices discover each other by listening at that address. Advertisements supported and configured in Cisco software are sent.com/en/US/docs/switches/lan/catalyst6500/ios/12. every 60 seconds.2SX/configuration/guide/ udld. C. CDP is enabled by default and can be disabled globally with the command no cdp enable. and network-independent protocol that networking applications use to learn about nearby.html QUESTION 62 Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true? A. UDLD can operate in either normal or aggressive mode. CDP is disabled by default and can be enabled globally with the command cdp run. E. media-independent. 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. When a unidirectional link is detected. directly connected devices.A. Reference: http://www. which indicates the length of time a receiving device should hold Cisco Discovery Protocol information before discarding it.com/en/US/docs/ios-xml/ios/cdp/configuration/15-mt/nm-cdp-discover. D. CDP is enabled by default and can be disabled globally with the command no cdp run. CDP is disabled by default and can be enabled globally with the command cdp enable. C. Reference: http://www. B.cisco. .html QUESTION 61 What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements? A. 30 seconds 60 seconds 120 seconds 300 seconds Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Cisco Discovery Protocol is a Layer 2. Advertisements contain time-to-live information. C. They also listen to messages to learn when interfaces on other devices are up or go down. Cisco Discovery Protocol is enabled by default.

html#wp1017573 QUESTION 63 Which VTP mode is needed to configure an extended VLAN.Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: CDP is enabled on your router by default.1q frame? A. C.094 VLANs Reference: http://en. B. VLANs in the range 1006 to 4094 are removed from VTP control. D.cisco. The hexadecimal values of 0x000 and 0xFFF are reserved. D. use the “no cdp enable interface” configuration command. To disable CDP on an interface.wikipedia.html QUESTION 64 What is the size of the VLAN field inside an 802. allowing up to 4. All other values may be used as VLAN identifiers. B. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: VTP version 1 and version 2 support VLANs 1 to 1000 only. 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.org/wiki/IEEE_802. CDP also is enabled on supported interfaces by default. use the “no cdp run” command.2SX/configuration/guide/ vtp. Reference: http://www.com/en/US/docs/switches/lan/catalyst6500/ios/12.1Q QUESTION 65 What is the maximum number of VLANs that can be assigned to an access switchport without a voice VLAN? . If converting from VTP version 3 to VTP version 2.com/en/US/docs/ios/12_2/configfun/command/reference/frf015. transparent client server Extended VLANs are only supported in version 3 and not in versions 1 or 2. Extended-range VLANs are supported only in VTP version 3. which means the Cisco IOS software will receive CDP information. Reference: http://www. C.cisco. when a switch is configured to use VTP versions 1 or 2? A. To disable it globally.

the port should be configured as a trunk port. QUESTION 66 Refer to the exhibit. B. C. D. If more than one VLAN is needed. . B.A. 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. Which option shows the expected result if a show vlan command is issued? A.

C. B. Use the show vlan privileged EXEC command to see if the VLAN is present (listed in the display). QUESTION 67 Which feature is automatically enabled when a voice VLAN is configured. portfast port-security spanning tree storm control Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Voice VLAN Configuration Guidelines You should configure voice VLAN on switch access ports. so even though Cisco IOS will accept both.C. D. D. but not automatically disabled when a voice VLAN is removed? A. ignoring the switchport access VLAN 10 command. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: In this case. Obviously. The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN. a port can not be both. 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. The Port Fast feature is automatically enabled when voice VLAN is configured. When you disable voice .

all the clients in the VTP domain will automatically enable VTP pruning.com/VTP-Pruning. Both VTP versions 1 and 2 supports pruning. 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.1Q does not encapsulate the original frame. D. Reference: http://www. B. Instead.cisco.org/wiki/IEEE_802.com/en/US/docs/switches/lan/catalyst2950/software/release/12.VLAN.wikipedia.html QUESTION 68 In which portion of the frame is the 802. C.1Q tag in an Ethernet frame 802. for Ethernet frames. it adds a 32-bit field between the source MAC address and the EtherType/length fields of the original frame Reference: http://en.1_22_ea11x/ configuration/guide/swvoip. the Port Fast feature is not automatically disabled.orbit-computer-solutions.1Q QUESTION 69 Which VLAN range is eligible to be pruned when a network engineer enables VTP pruning on a switch? A. By default. D. Reference: http://www. C.1q header found? A. B.php . 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. VLANs 2 – 1001 are pruning eligible.

Update the VTP revision number. you will need to enable 802. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Only VTP servers can add new VLANs to the switched network. .1q. Reference: http://www. The users in an engineering department that connect to the same access switch cannot access the network. Which action resolves this problem? A. QUESTION 72 Refer to the exhibit. even in situations in which few users are connected in that VLAN.1Q trunking to pass this new VLAN along to the other switches.1q. The network engineer found that the engineering VLAN is missing from the database. Enable VTP pruning and disable 802. so to enable vlan 10 on this switch you will first need to change the VTP mode from client to server. D. All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic. C. D. 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.cisco. All switches in the network receive all broadcasts. However.html#vtp_pruning QUESTION 71 Refer to the exhibit. there are occasions when VTP can create unnecessary traffic. C. B.1q.com/c/en/us/support/docs/lan-switching/vtp/10558-21. Change VTP mode to server and enable 802.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. B. Then. Disable VTP pruning and disable 802.

Delete vlan. D. B. Manually force trunking with switchport mode trunk on both 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. 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. C. but users in company A are not able to access network resources in company B when DTP is enabled. 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. Disable DTP and document the VTP domain mismatch. Enable the company B switch with the vtp mode server command.The network switches for two companies have been connected and manually configured for the required VLANs.dat and ensure that the switch with lowest MAC address is the VTP server. Consider that this is a multivendor environment. Which . Which action resolves this problem? A. The VTP domain names do match and they are both VTP servers so there are no issues there.

Cisco IOS switching feature can be used to achieve the task?
A.
B.
C.
D.

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.
There are 2 different methods for trunking, 802.1Q and ISL. Of these, only 802.1Q is supported by multiple
vendors since ISL is a Cisco proprietary protocol.
QUESTION 74
Which statement about using native VLANs to carry untagged frames is true?
A.
B.
C.
D.

Cisco Discovery Protocol version 2 carries native VLAN information, but version 1 does not.
Cisco Discovery Protocol version 1 carries native VLAN information, but version 2 does not.
Cisco Discovery Protocol version 1 and version 2 carry native VLAN information.
Cisco Discovery Protocol version 3 carries native VLAN information, but versions 1 and 2 do not.

Correct Answer: A
Section: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:
Cisco Discovery Protocol (CDP) version 2 passes native VLAN information between Cisco switches. If you
have a native VLAN mismatch, you will see CDP error messages on the console output.
Reference: http://www.ciscopress.com/articles/article.asp?p=29803&seqNum=3
QUESTION 75
Refer to the exhibit.

A multilayer switch has been configured to send and receive encapsulated and tagged frames. VLAN 2013 on
the multilayer switch is configured as the native VLAN. Which option is the cause of the spanning-tree error?
A.
B.
C.
D.

VLAN spanning-tree in SW-2 is configured.
spanning-tree bpdu-filter is enabled.
802.1q trunks are on both sides, both with native VLAN mismatch.
VLAN ID 1 should not be used for management traffic because its unsafe.

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, but 1 (the default native VLAN)
on the other switch. If you use 802.1Q trunks, you must ensure that you choose a common native VLAN for
each port in the trunk. 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. Native VLAN mismatches are detected via
spanning tree and Cisco Discovery Protocol (CDP), not via DTP messages. If spanning tree detects a native
VLAN mismatch, spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on
the trunk; however, the trunk still remains up for other VLANs.
Reference: http://www.informit.com/library/content.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. Which Cisco IOS feature can be used to
achieve this task?
A.
B.
C.
D.

VTP pruning
access list
switchport trunk allowed VLAN
VLAN access-map

Correct Answer: A
Section: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:
Cisco advocates the benefits of pruning VLANs in order to reduce unnecessary frame flooding. The “vtp
pruning” command prunes VLANs automatically, which stops the inefficient flooding of frames where they are
not needed.
Reference: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/24330-185.html
QUESTION 77
Which action allows a network engineer to limit a default VLAN from being propagated across all trunks?
A.
B.
C.
D.

Upgrade to VTP version 3 for advanced feature set support.
Enable VTP pruning on the VTP server.
Manually prune default VLAN with switchport trunk allowed vlans remove.
Use trunk pruning vlan 1.

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. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning. The “trunk pruning vlan 1”
option is not a valid command.
QUESTION 78

What is required for a LAN switch to support 802.1q Q-in-Q encapsulation?
A.
B.
C.
D.

Support less than 1500 MTU
Support 1504 MTU or higher
Support 1522 layer 3 IP and IPX packet
Support 1547 MTU only

Correct Answer: B
Section: Layer 2 Technologies
Explanation
Explanation/Reference:
Explanation:
The default system MTU for traffic on Catalyst switches is 1500 bytes. Because the 802.1Q tunneling (Q-in-Q)
feature increases the frame size by 4 bytes when the extra tag is added, you must configure all switches in the
service-provider network to be able to process maximum frames by increasing the switch system MTU size to
at least 1504 bytes.
Reference: http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_13_ea1/
configuration/guide/swtunnel.html
QUESTION 79
Refer to the exhibit.

How many bytes are added to each frame as a result of the configuration?
A.
B.
C.
D.

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 802.1Q trunking, all VLAN packets are tagged on the trunk link, except the native VLAN. A VLAN tag adds 4
bytes to the frame. Two bytes are used for the tag protocol identifier (TPID), the other two bytes for tag control
information (TCI).
QUESTION 80
A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1, G0/2, G0/3, and G0/4
between two switches using Ethernet port-channel. Which action allows interface G0/1 to always actively
forward traffic in the port-channel?
A.
B.
C.
D.

Configure G0/1 as half duplex and G0/2 as full duplex.
Configure LACP port-priority on G0/1 to 1.
Configure LACP port-priority on G0/1 to 65535.
LACP traffic goes through G0/4 because it is the highest interface ID.

1.com/c/en/us/support/docs/switches/catalyst-2900-xl-series-switches/21041131.cisco. and on. The port priority can be configured automatically or through the CLI. Reference: http://www. however. and on-on allow the formation of a channel. Only the combinations auto-desirable. . 4. and on. 2. LACP uses the port priority with the port number to form the port identifier. it is not initiated. desirable. The channel is forced to come up. The formation of a channel is desired and initiated. Only the combinations auto-auto. and on-on will allow a channel to be formed. The default is 32768. desirable. The formation of a channel is desired. desirable. desirable-desirable.cisco. Only the combinations active-desirable. desirable-desirable. PagP modes are off.html QUESTION 82 Refer to the exhibit. desirable-desirable. and on. auto. The higher the number. Only the combinations auto-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. If a device on one side of the channel does not support PagP. and on-on allow the formation of a channel. PagP modes are off.Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: A LACP port priority is configured on each port using LACP. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PagP modes are off. and on. PagP modes are active. the lower the priority. desirable-desirable. on: PagP will not run. auto. desirable. desirable-desirable. The port priority determines which ports should be put in standby mode when there is a hardware limitation that prevents all compatible ports from aggregating. desirable. The PagP modes are explained below. B. off: PagP will not run. desirable: PagP is running actively. and on-on allow the formation of a channel. the device on the other side must have PagP set to on. auto: PagP is running passively. The valid range is from 1 to 65535. active. Only the combinations active-active.com/c/en/us/td/docs/ios/12_2sb/feature/guide/gigeth. D. PagP modes are active. and on-on allow the formation of a channel. and on-on will allow a channel to be formed. Reference: http://www. and on. Only the combinations of auto-desirable. C. The channel is forced to remain down. desirable-desirable. such as a router. 3.

D. 2. however. The channel is forced to remain down. B. off: PAgP will not run. Only the combinations auto-desirable. and on. it is not initiated. . The formation of a channel is desired and initiated. The channel is forced to come up.Which EtherChannel negotiation protocol is configured on the interface f0/13 – f0/15? A. 3. the switch neither sends the LACP packet nor processes any inbound LACP packet. auto: PAgP is running passively. 4. desirable-desirable. desirable. The Link Aggregate Control Protocol (LACP) trunking supports four modes of operation: On: The link aggregation is forced to be formed without any LACP negotiation . 1. and on-on will allow a channel to be formed. auto. desirable: PAgP is running actively.In other words. C. 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. The formation of a channel is desired. This is similar to the on state for . on: PAgP will not run.

traffic will only be using one of the port channel links. the network engineer configured an EtherChannel on interfaces Fa1/0 and Fa0/1 of the server farm switch. The peer (in active state) initiates negotiation (when it sends out an LACP packet) which we receive and answer. Which statement describes what happens to all ports in the bundle? . QUESTION 83 Refer to the exhibit.PAgP. Change the load-balance method to dst-mac. In this example. Disable EtherChannel load balancing. Upgrade the switch IOS to IP services image. Off: The link aggregation is not formed. fa0/14. We do not send or understand the LACP packet. the source MAC address will always be that of PC-1. The link aggregate is formed if the other end runs in LACP active or passive mode. Users of PC-1 experience slow connection when a webpage is requested from the server. which is only a PAgP mode. Which action can the engineer take to resolve this issue? A. QUESTION 84 A network engineer changed the port speed and duplex setting of an existing EtherChannel bundle that uses the PAgP protocol. which is operating in desirable mode. Active: We can form an aggregate link and initiate the negotiation. 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. eventually to form the aggregation channel with the peer. This is similar to the auto mode in PAgP. and fa0/15 are all in Port Channel 12. we see that fa 0/13. This is similar to the desirable mode of PAgP. since the web server has two NICs traffic will be load balanced across both MAC addresses. This is similar to the off state for PAgP. D. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Since this traffic is coming from PC-1. The load balancing method should be changed to destination MAC. To increase bandwidth. and since the load balancing method is source MAC. Contact Cisco TAC to report a bug on the switch. Passive: The switch does not initiate the channel but does understand inbound LACP packets. B. traffic is still slow. C.

Each EtherChannel can consist of up to eight compatibly configured Ethernet interfaces. Only the combinations auto-desirable. PAgP changes the port speed and duplex for all ports in the bundle. •PAgP modes are off. PAgP changes the port speed and duplex for all ports in the bundle.html QUESTION 86 Refer to the exhibit. Reference: http://www. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PAgP aids in the automatic creation of EtherChannel links. and on.A. B. C. and all must be configured as either Layer 2 or Layer 3 interfaces. desirable. PAgP requires that all ports in the channel belong to the same VLAN or are configured as trunk ports. D. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. The device on the other side must have PAgP set to on if a device on one side of the channel does not support PAgP. When a bundle already exists and a VLAN of a port is modified. 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. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. 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. desirable-desirable. Reference: http://www. auto. B. all ports in the bundle are modified to match that VLAN.cisco. PAgP changes the port speed but not the duplex for all ports in the bundle. D.html QUESTION 85 Which statement about using EtherChannel on Cisco IOS switches is true? A. •PAgP does not group ports that operate at different speeds or port duplex. 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 EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 10 Gbps only for Gigabit EtherChannel. PAgP does not change the port speed and duplex for all ports in the bundle until the switch is rebooted.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. If speed and duplex change when a bundle exists.cisco. C. PAgP packets are sent between EtherChannelcapable ports in order to negotiate the formation of a channel. PAgP drops the ports that do not match the configuration. Some restrictions are deliberately introduced into PAgP.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. All interfaces in each EtherChannel must be the same speed. The restrictions are: •PAgP does not form a bundle on ports that are configured for dynamic VLANs. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. and on-on allow the formation of a channel. .

1d to . Logical port Fa0/13. Physical port Fa0/13. and Fa0/15 successfully formed a Layer 3 port-channel interface using a Cisco proprietary protocol. which is Cisco proprietary. and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol. The protocol used for this port channel shows as LACP. Fa0/14. C. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: These three ports show that they are in Port Channel 1. which is a standards based protocol.1d BPDU and eventually the two switches run 802.Which statement about switch S1 is true? A. as opposed to PagP. 802. B. and Fa0/15 successfully formed a Layer 2 physical port-channel interface using a Cisco proprietary protocol. D. QUESTION 87 What happens on a Cisco switch that runs Cisco IOS when an RSTP-configured switch receives 802. but when a RSTP switch receives an 802. and the (SU) means they are in use and operating at layer 2. it responds with an 802. and Fa0/15 successfully formed a Layer 3 physical port-channel interface using an open standard protocol. Fa0/14. Physical port Fa0/13. Logical port Fa0/13.1d does not understand RSTP BPDUs because they are different versions.1d BPDU.1d BPDU? A. Fa0/14. Fa0/14.

802. Reference: http://www. and the special 0 instance.1d to communicate. the migrate-delay timer is started (specifies the minimum time during which RSTP BPDUs are sent). MST maintains multiple spanning tree instances. Instance 0 is a special instance for a region. such as root bridge ID. it assumes that it is connected to an 802. RSTP selectively sends 802. it responds with a 802. and RSTP BPDUs are sent. but each MST instance has its own topology parameters. Within each MST region. but when a RSTP switch receives a 802. which are 68sername6868eed within MST BPDUs. The IST is the only spanning tree instance that sends and receives BPDUs. the number of BPDUs that need to be processed to support multiple spanning tree instances is 68sernamcantly reduced. known as the IST.1d to communicate.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/ book/spantree. While this timer is active. 802. CIST. D.html QUESTION 88 When two MST instances (MST 1 and MST 2) are created on a switch. All other MST instances are numbered from 1 to 4094. B. 1 2 3 4 Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Unlike other spanning tree protocols. and so forth.1d BPDU. for a total of 3 instances. By default. C.1d understands RSTP BPDUs because they are the same version. All MST instances within the same region share the same protocol timers.1d BPDU.1d does not understand RSTP BPDUs because they are different versions. it restarts the timer and starts using RSTP BPDUs on that port. all VLANs are assigned to .1d BPDU.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired. and CST spanning trees: An IST is the spanning tree that runs in an MST region.1D configuration BPDUs and TCN BPDUs on a per-port basis.cisco. 802. but when a RSTP switch receives a 802.1d understands RSTP BPDUs because they are the same version. C. but when a RSTP switch receives a 802. D.1D switches. what is the total number of spanningtree instances running on the switch? A. there will be the 2 defined MST instances. All of the other spanning tree instance information is contained in MSTP records (M-records). it does not respond with a 802. If the switch receives an 802.1d BPDU and eventually the two switches run 802.1D BPDU after the port migration-delay timer has expired. MST establishes and maintains IST. Because the MST BPDU carries information for all instances. In the case for this question.1d BPDU.1D switch and starts using only 802.1d BPDU and eventually the two switches run 802. the switch processes all BPDUs received on that port and ignores the protocol type. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: For backward compatibility with 802. B. root path cost. in which all the spanning tree instances are independent.communicate. it does not respond with a 802. However. When a port is initialized. if the RSTP switch is using 802.1D BPDUs.

the IST. even if regions A and B are interconnected. MST instance 1 in region A is independent of MST instance 1 in region B. The possible priority range is 0 . STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16. D.cisco. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: If a loop occurs. 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. C. STP considers port priority when selecting a LAN port to put into the forwarding state. 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. Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16. If all LAN ports have the same priority value.html QUESTION 89 Refer to the exhibit. f1/0 and f1/1 have the same end-to-end path cost to the designated bridge. Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0. Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0. B. The CST interconnects the MST regions and single spanning trees. An MST instance is local to the region. Reference: http://www. for example. A CIST is a collection of the ISTs in each MST region.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/ book/spantree.

A lower path cost represents higher-speed transmission and is preferred. The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”. the default is 32768. C.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_9_ea1/ configuration/guide/swstp. D.cisco. configurable in increments of 16. The lower the number.com/en/US/docs/switches/lan/catalyst2950/software/release/12. The switch priority value is zero.html#wp1020666 QUESTION 91 Refer to the exhibit. Why would the switch be considered as a root bridge? A. it has the lowest priority value for VLAN 1. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: For priority. B.cisco.through 240 (default 128). The bridge priority is 1 and all ports are forwarding. The bridge priority is 128. the more likely the switch will be chosen as the root switch.html#wp1105354 QUESTION 90 Refer to the exhibit. .1_9_ea1/ configuration/guide/swstp. Reference: http://www. the range is 0 to 61440 in increments of 4096.19 and all ports are forwarding. Reference: http://www.

fa0/21 has the lowest cost. The engineer observes that when the PC is connected to the network.lowest prevails In this case. Considering the default cost of upstream bridges to the root bridge is equal.lowest prevails Connected Port ID (Port Priority + Port#) . B. D. from the direction of Root Bridge) Connected Bridge ID .extremenetworks.All ports are members of VLAN 10. it takes 30 to 60 seconds for the PC to see any activity on the network interface card. interface f0/13 interface f0/14 interface f0/15 71sername71e f0/21 Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Root Port election on each bridge Each (non-Root) bridge has exactly one Root Port. Reference: https://community.com/extreme/topics/802_1d_spanning_tree_election_rules QUESTION 92 A network engineer is trying to deploy a PC on a network. C. Configure port duplex and speed to auto negotiation. which option will be the new root port for VLAN 10? A. Configure spanning-tree portfast.lowest prevail– Local Port ID . C. Total Path Cost to root . D. Configure port to duplex full and speed 1000. Which Layer 2 enhancement can be used to eliminate this delay? A. which represents the best path to the Root Bridge. so it will be the root port.lowest prevails (local Root Port cost added upon receipt of Configuration – PDUs on that port. Configure no switchport. B. .

Reference: http://net. bypassing the listening and learning states. the port does not go through the spanning-tree listening. These steps are outlined as follows. The port goes into BPDU-inconsistent state and stops forwarding traffic. B.us/Home/ethernet-and-ip/spanning-tree-protocol QUESTION 93 A network engineer configured an Ethernet switch using these commands. each port goes through 4 states to ensure that there are no physical loops in the layer 2 broadcast domain. normal operation.cmed. If an interface is enabled for portfast receives BDPU. and forwarding states. 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. STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately. With the initial version of spanning tree. . If an interface is enabled for portfast receives BDPU. If an interface is enabled for portfast receives BDPU. B. Switchone(config) # Spanning-tree portfast bpdufilter default Which statement about the spanning-tree portfast feature on the switch is true? A. the “Spanning-tree portfast bpdufilter default” command specifies that if a BPDU is received on that port. and forwarding states. STP still monitors incoming BPDUs that would indicate it should return to the blocking state to prevent a loop. no user data is sent or received but it may go into forwarding mode if the other links in use were to fail and the spanning tree algorithm determines the port may transition to the forwarding state. learning. C. then the default action of STP of listening. 3. this process could take from 30-60 seconds. and forwarding states should be used. bypassing the listening and learning states. BPDU data is still received in blocking state.Forwarding – A port receiving and sending data. The port goes into root-inconsistent state and stops forwarding traffic. 2. the port goes into the spanning-tree inconsistent state. QUESTION 94 Which statement describes what happens when a port configured with root guard receives a superior BPDU? A. The port goes into errdisabled state and stops forwarding traffic. D. the port is shut down immediately. 1.Learning – While the port does not yet forward frames (packets) it does learn source addresses from frames received and adds them to the filtering database (switching database) 4. The port goes into loop-inconsistent state and stops forwarding traffic. C.Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: When first powered on.Blocking – A port that would cause a switching loop. However. If an interface is enabled for portfast receives BDPU. the port goes through the spanning-tree listening.Listening – The switch processes BPDUs and awaits possible new information that would cause it to return to the blocking state. D. learning. learning.

Converting a port channel to mLACP can cause a service disruption. This root-inconsistent state is effectively equal to a listening state.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.com/en/US/docs/switches/lan/catalyst6500/ios/12. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: When configuring mLACP for Server Access. C. The DHD system priority must be lower (higher numerically) than the PoA system priority. C.cisco. It does not support 1Gb links. No more than 100 VLANs can be active on a switch configured as a PoA. mLACP does not support half-duplex links. Reference: http://www. No traffic is forIarded across this port. follow these guidelines and restrictions: PFC3A mode does not support the mLACP for server access feature. It is not available in VSS.2SX/configuration/guide/ mlacp_server_support. unless two or more ports of the root bridge are connected together. Reference: http://www. If the bridge receives superior STP Bridge Protocol Data Units (BPDUs) on a root guard-enabled port.html QUESTION 96 What is the maximum number of 10 Gigabit Ethernet connections that can be utilized in an EtherChannel for the virtual switch link? A. 4 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) . It is available only on a Cisco Catalyst 6500 Series chassis. D. the root guard enforces the position of the root bridge. In this way. B. VSS mode does not support the mLACP for server access feature. Normally. root guard moves this port to a root-inconsistent STP state. D.cisco. root bridge ports are all designated ports.shtml QUESTION 95 Which statement about restrictions for multichassis LACP is true? A.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b. B. mLACP does not support multiple neighbors. Converting a port channel to mLACP can cause a service disruption.

Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: . all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member.cisco. If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up. The switch shuts down and waits for the VSL link to be restored before sending traffic. and both virtual switch members continue to forward traffic independently. The VSS transitions to the dual active recovery mode. but the new active virtual switch forwards traffic on all links. What happens if all VSL connections between the virtual switch members are lost? A. and only the new active virtual switch continues to forward traffic.deployed with the Virtual Switching Supervisor 720 10GE Virtual switch link (VSL): 10 Gigabit Ethernet connections (up to eight using EtherChannel) between the virtual switch members. Reference: http://www. The VSS detects which system was last in active state and shuts down the other switch. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Q. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops.cisco. C. D.com/en/US/prod/collateral/switches/ps5718/ps9336/ prod_qas0900aecd806ed74b.html QUESTION 97 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A. The virtual switch members reload. All interfaces are shut down in the formerly active virtual switch member. B. 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. D. Reference: http://www. VSLs can be configured with up to eight links between the two switches across any combination of line cards or supervisor ports to provide a high level of redundancy.2(33)SXI) In the dual active recovery mode.com/en/US/prod/collateral/switches/ps5718/ps9336/ prod_qas0900aecd806ed74b. The VSS transitions to the dual active recovery mode. The new active virtual switch continues to forward traffic on all links. B. C.html QUESTION 98 Which statement describes what happens when a switch enters dual active recovery mode? A. Both virtual switch members cease to forward traffic. the VSS will transition to the dual active recovery mode.

All other vlans should be left are their default values. SwitchB has a minimal configuration. Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. They have just added a new switch (SwitchB) to the existing network as shown in the topology diagram. 22 and 23.Explanation: In the dual active recovery mode. • SwitchA needs to be the root switch for vlans 11. . but will need to be modified to support the addition of SwitchB. with SwitchA controlling activation. SwitchA and SwitchB use Cisco as the enable password.168. 22 and 23 should tagged when traversing the trunk link. 12. This mode should be done with a non-proprietary protocol. 21. Configuration Requirements for SwitchB Vlan 21 Name: Marketing will support two servers attached to fa0/9 and fa0/10 Vlan 22 Name: Sales will support two servers attached to fa0/13 and fa0/14 Vlan 23 Name: Engineering will support two servers attached to fa0/15 and fa0/16 Access ports that connect to server should transition immediately to forwarding state upon detecting the connection of a device.cisco. You have been tasked with competing the needed configuring of SwitchA and SwitchB.html QUESTION 99 SIMULATION Scenario: You work for SWITCH. 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.com. The new active virtual switch continues to forward traffic on all links. RouterA is currently configured correctly and is providing the routing function for devices on SwitchA and SwitchB.1. Reference: http://www. 13. 21.com/en/US/prod/collateral/switches/ps5718/ps9336/ prod_qas0900aecd806ed74b. The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all vlans.11/24 Inter-switch Connectivity Configuration Requirements For operational and security reasons trunking should be unconditional and Vlans 1. Configuration Requirements for SwitchA The VTP and STP configuration modes on SwitchA should not be modified. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. SwitchA is currently configured correctly. SwitchB VTP mode needs to be the same as SwitchA.

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Correct Answer: Here are steps Section: Layer 2 Technologies Explanation Explanation/Reference: Initial Configuration (some lines have been removed) .

21-23 root primary SW-A(config)#vlan 21 SW-A(config-vlan)#name Marketing SW-A(config-vlan)#exit SW-A(config)#vlan 22 SW-A(config-vlan)#name Sales SW-A(config-vlan)#exit SW-A(config)#vlan 23 SW-A(config-vlan)#name Engineering SW-A(config-vlan)#exit SW-A(config)#interface range fa0/3 – 4 SW-A(config-if-range)#no switchport mode access SW-A(config-if-range)#no switchport access vlan 98 (These two commands must be deleted to form a trunking link) . 13 we have to create them first with command “SW-A(config)#vlan 11. 12.12.Solution SW-A (close to router) Note: If Sw-A does not have Vlan 11.13” SW-A(config)#spanning-tree vlan 11-13.

1. ——————————————————————————————– SW-B (far from router) SW-B(config)#vlan 21 SW-B(config-vlan)#name Marketing SW-B(config-vlan)#exit SW-B(config)#vlan 22 SW-B(config-vlan)#name Sales SW-B(config-vlan)#exit SW-B(config)#vlan 23 SW-B(config-vlan)#name Engineering SW-B(config-vlan)#exit SW-B(config)#vlan 99 SW-B(config-vlan)#name TrunkNative // not necessary to name it but just name it same as SwitchA SW-B(config-vlan)#exit SW-B(config)#interface range fa0/9 – 10 SW-B(config-if-range)#switchport mode access SW-B(config-if-range)#switchport access vlan 21 SW-B(config-if-range)#spanning-tree portfast SW-B(config-if-range)#no shutdown SW-B(config-if-range)#exit SW-B(config)#interface range fa0/13 – 14 SW-B(config-if-range)#switchport mode access SW-B(config-if-range)#switchport access vlan 22 SW-B(config-if-range)#spanning-tree portfast SW-B(config-if-range)#no shutdown SW-B(config-if-range)#exit SW-B(config)#interface range fa0/15 – 16 SW-B(config-if-range)#switchport mode access SW-B(config-if-range)#switchport access vlan 23 SW-B(config-if-range)#spanning-tree portfast SW-B(config-if-range)#no shutdown SW-B(config-if-range)#exit SW-B(config)#vtp mode transparent SW-B(config)#spanning-tree mode rapid-pvst //Same as Sw-A SW-B(config)#ip default-gateway 192.21-23 SW-A(config-if)#no shut Note: When you apply commands under “interface port-channel 1”.1.168.11 255. the same commands will be automatically applied to the physical member interfaces (of port-channel 1) so you don’t need to type them under physical member interfaces again.168.0 SW-B(config-if)#no shutdown SW-B(config-if)#exit SW-B(config)#interface range fa0/3 – 4 SW-B(config-if-range)#channel-group 1 mode passive //mode passive because “SwitchA controlling activation” SW-B(config-if-range)#channel-protocol lacp SW-B(config-if-range)#no shutdown SW-B(config-if)#interface port-channel 1 SW-B(config-if)#switchport trunk encapsulation dot1q SW-B(config-if)#switchport mode trunk .SW-A(config-if-range)#channel-group 1 mode active SW-A(config-if-range)#channel-protocol lacp SW-A(config-if-range)#no shutdown SW-A(config-if)#interface port-channel 1 SW-A(config-if)#switchport mode trunk SW-A(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches SW-A(config-if)#switchport trunk allowed vlan 1.1 (you can get this IP from SW-A with command show cdp neighbour detail) SW-B(config)#interface vlan 1 SW-B(config-if)#ip address 192.255.255.

1Q and we have to explicitly set which trunking protocol to be used.21-23 SW-B(config-if)#no shut Note: For Sw-B we have to set the 802.SW-B(config-if)#switchport trunk native vlan 99 //this command will prevent the “Native VLAN mismatched” error on both switches SW-B(config-if)#switchport trunk allowed vlan 1.1Q is the only supported trunking protocol) so we can apply “switchport mode trunk” directly. Sw-A is a 2900x series (or lower) switch and does not support ISL trunking protocol (802. ——————————————————— Some guidelines for configuring SwitchA & SwitchB: Configuration Requirements for SwitchA Configuration Requirements for SwitchB Inter-switch Connectivity Configuration Requirements: .1q trunking protocol (switchport trunk encapsulation dot1q) before converting it into a trunk because it is a 3500 series (or higher) switch which supports both ISL and 802.

Some notes for this sim: + You should check the initial status of both switches with these commands: show vtp status (transparent mode on switchA and we have to set the same mode on switchB). show etherchannel 1 port-channel and show ip int brief(check if Port-channel 1 has been created and make sure it is up).show run (to check everything again). . show spanning-tree [summary] (rapidpvst mode on switchA and we have to set the same mode on switchB). show vlan (check the native vlan and the existence of vlan99).

QUESTION 100 SIMULATION You have been tasked with configuring multilayer SwitchC.0/24 – 190. Routed interfaces should use the lowest host on a subnet when possible. Note: Due to administrative restrictions and requirements you should not add or delete VLANs. + The name of SwitchA and SwitchB can be swapped or changed so be careful to put your configuration into appropriate switch. + At the end. SwitchA already have vlan 99 configured. changes VLAN port assignments or create trunks. RouterC is correctly configured. .1. Company policies forbid the use of static or default routing. SwitchC uses Cisco as the enable password. Also SwitchC needs to be able to ping server S1. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links. Routing must only be enabled for the specific subnets shown in the diagram.250.200.200. which has a partial configuration and has been attached to RouterC as shown in the topology diagram. you can use the “ip default-gateway 192.1” on SwitchB. You do not have access to RouteC.10. you can try to ping from SwitchB to RouterA (you can get the IP on RouterA via the show cdp neighbors detail on SwitchA).250.+ When using “int range f0/x – y” command hit space bar before and after “-” otherwise the simulator does not accept it. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1. No trunking has been configured on RouterC.168. All routes must be learned via EIGRP 65010 routing protocol. If not. The following subnets are available to implement this solution: – 10. not sure if it can ping or not. Company policies forbid the use of static or default routing. All routes must be learned via the EIGRP routing protocol.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway.10. + You must create vlan 99 for the switchB.32/27 – 190.

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No trunking requires. We should check the default gateways on H1 & H2. Click on H1 and H2 and type the “ipconfig” command to .Correct Answer: There are two ways to configure interVLAN routing in this case Section: Layer 2 Technologies Explanation Explanation/Reference: + Use RouterC as a “router on a stick” and SwitchC as a pure Layer2 switch. 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. SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router). Trunking must be established between RouterC and SwitchC. + 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.0/16 is not used anywhere else in this topology.0.200.31″ we can use one simple command “network 190.200.0.65 Now we have enough information to configure SwitchC (notice the EIGRP AS in this case is 650) Note: VLAN2 and VLAN3 were created and gi0/10.10.10.255.0. in fact it is not necessary because the network 190. Use the console access to the existing and new switches to configure and verify correct device configuration.32 0.255.255 SwitchC(config-router)# network 190.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED.0.0.10. Also some reports said the “no auto-summary” command can’t be used in the simulator.32 0. we are pretty sure instead of using two commands “network 190. Also make sure you use the correct EIGRP AS number (in the configuration above it is 650 but it will change when you take the exam) but we are not allowed to access RouterC so the only way to find out the EIGRP AS is to look at the exhibit above.0.250.31 SwitchC(config-router)# network 190.10. C:\>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190.33 Host2: + Default gateway: 190. .33 255. we can use “show run” command to verify.250.0 0.200. the simulator does not let you assign IP address on Gi0/1 interface.0″ because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised. just for sure.200.0.250.250.2 255. In fact.250. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.250. But in the exam the sim is just a flash based simulator so we should use two above commands. But after finishing the configuration. In order to complete the lab.250. QUESTION 101 You have been asked to install and configure a new switch in a customer network.get their default gateways. so you will not miss within it in the exam. you should expect the ping to SERVER to succeed from the MLS.200.255.200. no neighbor relationship is formed between RouterC and SwitchC.200.0.200.65 255.255.1 so this is the lowest usable IP address.0 ->RouterC has used IP 10.10.0.31″ and “network 190.0. SwitchC(config-if)# ip address 10.0. If you use wrong AS number. also don’t modify/delete any port just do the above configuration.200. even without “no autosummary” command the network still works correctly.64 0.64 0.255. only the summarized network 190. and from the PCs as well.200.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190.10.200.0.224 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 is shown. gi0/11 interfaces were configured as access ports so we don’t need to configure them in this sim.250.0.

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

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. step one is to find the correct VTP name on the other switches. So. E. the VTP domain name must match. B. C.A. Logging in to SW1 and using the “show vtp status” command we see this: .

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

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Refer to the configuration. VLAN 99 . For which configured VLAN are untagged frames sent over trunk between SW1 and SW2? A. VLAN1 B.

D. G. By issuing the “show interface trunk” command on SW1 and SW2 we see the native VLAN is 99. Use the console access to the existing and new switches to configure and verify correct device configuration. . QUESTION 103 You have been asked to install and configure a new switch in a customer network. F. E.C. 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.

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

configure vtp mode as off and configure VLAN 500 and VLAN 600. so we will need to add both VLANs to SW1 and SW2. but SW4 is a client.SW2 and SW4 On SW2. configure back to vtp server mode. SW2. and SW4 we see that both SW1 and SW2 are operating in VTP server mode.B. E. Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: By issuing the “show vtp status command on 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 . C. D. .

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

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Disable VTP pruning on SW2 only .Examine the VTP configuration. You are required to configure private VLANs for a new server deployment connecting to the SW4 switch. Disable VTP pruning on SW1 only B. Which of the following configuration steps will allow creating private VLANs? A.

html#wp1090479 QUESTION 106 Which portion of AAA looks at what a user has access to? A. By default. Reference: http://www. Enable DHCP snooping globally. D. The feature is not active until you complete this step. 5.cisco. authorization authentication accounting auditing Correct Answer: A Section: Infrastructure Security Explanation . In this case.C. Configure the DHCP snooping database agent. Apply ip dhcp snooping trust on all interfaces with dynamic addresses.com/en/US/docs/switches/lan/catalyst6500/ios/12. Correct Answer: C Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: To create private VLANs. This step ensures that database entries are restored after a restart or switchover. QUESTION 105 A Cisco Catalyst switch that is prone to reboots continues to rebuild the DHCP snooping database. Disable VTP pruning on New_Switch and SW4 only. Ensure that DHCP server is connected through a trusted interface. E. Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting. Define and configure the DHCP server. the trust state of all interfaces is untrusted. By default. What is the solution to avoid the snooping database from being rebuilt after every device reboot? A. Disable VTP pruning on SW4 only D.2SX/configuration/guide/ snoodhcp. Disable VTP pruning on SW2. D. SW4 and New_Switch E. you will need to only disable pruning on the switch that contains the private VLANs. Enable DHCP snooping for all VLANs that are associated with the switch. C. 4. DHCP snooping is inactive on all VLANs. only SW4 will connect to servers in a private VLAN. 2. 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. B. Enable DHCP snooping on at least one VLAN. Disable Option 82 for DHCP data insertion. B. C. A DHCP snooping database agent should be configured. 3.

Disable DHCP snooping information option. and reporting. B. This capability protects the network from . authorization looks at what that authenticated user has access to do.com/blog/data-center/what-is-aaa-and-how-do-you-configure-it-in-thecisco-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. and discards ARP packets with invalid IP-to-MAC address bindings. it can also support encryption. In the Cisco IOS. Correct Answer: B Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Dynamic ARP inspection is a security feature that validates ARP packets in a network. you could get a log of when users logged in and when they logged out. RADIUS or TACACS+ security servers perform authorization for specific privileges by defining attribute-value (AV) pairs. It provides a way“o” collecting security information that you can use for billing. Configure a static DHCP snooping binding entry on the switch.techrepublic. so it will primarily use RADIUS for authentication and fail over to the local user database only if the RADIUS server is unreachable. It intercepts. the network team is considering enabling dynamic ARP inspection alongside DHCP snooping. C. which would be specific to the individual user rights. Trust the interface that is connected to the server with the ip dhcp snooping trust command. D. You can use accounting to see what users do once they are authenticated and authorized.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. auditing. For more protection against malicious attacks. (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. with accounting. It also lists radius first then local. Depending on your security options. C. you can define AAA authorization with a named list or authorization method. Reference: http://www. Which solution ensures that the server maintains network reachability in the future? A. logs. For example. Authorization: After initial authentication. Verify the source MAC address of all untrusted interfaces with ip dhcp snooping verify mac-address command. QUESTION 108 A server with a statically assigned IP address is attached to a switch that is provisioned for DHCP snooping. Accounting: The last "A" is for accounting. B. D.

This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. . Private VLANs also carry TLVs that are not known to all types of Cisco switches. To ensure network reachability to the server. D. If the ARP packet is received on a trusted interface. and its associated VLAN number.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. Enable VTP version 3. Reference: http://www. the switch forwards the packet without any checks. Packets from the workstation will be rate limited according to the default values set on the switch. Configure VTP Transparent Mode. Ensure all switches are configured as VTP server mode. Which statement describes the outcome of this scenario? A. its associated MAC address. Dynamic ARP inspection ensures that only valid ARP requests and responses are relayed. The switch uses the IP source binding table only wIen IP source guard is enabled. 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 switch forwards the packet only if it is valid. An entry in this table has an IP address. The packets originating from the workstation are assumed to be spoofed and will be discarded. C. D. The interface that is connected to the workstation in question will be put into the errdisabled state. C. 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.cisco. Disable VTP and manually assign VLANs.certain man-in-the-middle attacks.html QUESTION 109 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN. B. On untrusted interfaces. B. 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. Reference: http://www. Traffic will pass accordingly after the new IP address is populated into the binding database. Private VLANs are configured in the context of a single switch and cannot have members on other switches. the DHCP snooping binding database. The IP address of one of the workstations does not match any entries found in the DHCP binding database.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_55_se/ configuration/guide/scg3750/swdynarp. Which configuration must be made before the private VLAN is configured? A.ciscopress.com/articles/article. 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). configure a static DHCP snooping binding entry on the switch.

or the client is not assigned an IP address. D. The DHCP client interfaces have storm control configured. Static DHCP bindings are not configured on the switch. Reference: http://www. IP traffic is filtered based on the source IP and MAC addresses. C. using the ip verify source port-security interface configuration command. The switch is configured for sdm prefer routing as the switched database management template. or with source IP and MAC address filtering. there are two caveats: The DHCP server must support option 82. even if they are not utilized for dynamic address allocation. C. 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. When IP source guard is enabled with this option. If there is no match. The interfaces are configured as Layer 3 using the no switchport command. The switch forwards traffic only when the source IP and MAC addresses match an entry in the IP source binding table. B. DHCP snooping must be enabled on all VLANs. The DHCP server does not support information option 82. IP traffic is filtered based on the source IP address. B.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/72846-layer2secftrs-catl3fixed. The configured SVIs on the switch have been removed for the associated interfaces. Which option is the cause of the problem? A.html#wp1069615 QUESTION 112 A switch is added into the production network to increase port capacity.html#ipsourceguard QUESTION 111 A DHCP configured router is connected directly to a switch that has been provisioned with DHCP snooping.cisco. clients are not receiving an IP address via the DHCP server. Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: When you enable both IP Source Guard and Port Security. Which option is the cause of this issue? A. However. A network engineer is configuring the switch for DHCP snooping and IP Source Guard. You . Layer 2 interfaces by filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-2_25_see/ configuration/guide/3550SCG/swdhcp82. Correct Answer: B Section: Infrastructure Security Explanation Explanation/Reference: Explanation: IP source guard is a security feature that restricts IP traffic on nonrouted. The switch 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. No VLANs exist on the switch and/or the switch is configured in VTP transparent mode. but is unable to configure ip verify source under several of the interfaces. Reference: http://www. D. The local DHCP server is disabled prior to enabling IP Source Guard. When IP source guard is enabled with this option.You can configure IP source guard with source IP address filtering.cisco. E. The MAC address in the DHCP packet is not learned as a secure address. the packets are assumed to be spoofed and will be discarded. The MAC address of the DHCP client is learned as a secure address only when the switch receives non-DHCP data traffic.

The switch drops broadcasts when they reach 75% of bandwidth. You can configure IP source guard with source IP address filtering or with source IP and MAC address filtering.html .com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-2_25_see/ configuration/guide/3550SCG/swtrafc. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. After IP source guard is enabled on an interface. IP source guard is supported only on Layer 2 ports. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth. Reference: http://www.) A. F.cisco. and its associated VLAN number. the broadcast keyword was used so only broadcast traffic is limited. 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: CDF Section: Infrastructure Security Explanation Explanation/Reference: Explanation: In this case. In which three ways does this command impact the traffic? (Choose three. D. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth.html#wp1069615 QUESTION 113 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server.cisco. except for DHCP packets allowed by DHCP snooping. Only broadcast traffic is limited by this particular storm control configuration. The switch uses the IP source binding table only when IP source guard is enabled.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-2_25_see/ configuration/guide/3550SCG/swdhcp82. its associated MAC address. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). B. E. C. including access and trunk ports. Reference: http://www. the switch blocks all IP traffic received on the interface. A port access control list (ACL) is applied to the interface. You can enable IP source guard when DHCP snooping is enabled on an untrusted interface. An entry in this table has an IP address.can use IP source guard to prevent traffic attacks caused when a host tries to use the IP address of its neighbor.

D. E. They decide to configure the network to automate the process of re-enabling user ports. Reference: http://www. If a port is in per-VLAN errdisable mode.QUESTION 114 After port security is deployed throughout an enterprise campus. Which two commands help trace this PC when the MAC address is known? (Choose two. Which command accomplishes this task? A.pdf QUESTION 115 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server. This is the default mode. B.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/53SG/configuration/config/ port_sec.e289 Dynamic 1 FastEthernet0/1 . 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.-------------------0010. C. B. the network team has been overwhelmed with port reset requests. E. C.---.-----------.0de0. 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. 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. Here is an example output: Switch> show mac-address-table Dynamic Addresses Count: 9 Secure Addresses (User-defined) Count: 0 Static Addresses (User-defined) Count: 0 System Self Addresses Count: 41 Total MAC addresses: 50 Non-static Address Table: Destination Address Address Type VLAN Destination Port ------------------.) A. 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. including the switch port that the particular host is using. D. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port.

network B. Storm control uses rising and falling thresholds to block and then restore the forwarding of broadcast. C. or unicast storm on a port.html QUESTION 118 Which AAA Authorization type includes PPP. AAA features are not available for use until you enable AAA globally by issuing the aaa new-model command. 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.1540 0010. D.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12-1_22ea/SCG/ scg/swtrafc. unicast.cisco. Errors in the protocol-stack implementation. A LAN storm occurs when packets flood the LAN. Which option decreases consumption of bandwidth used by broadcast traffic? A. mistakes in network configuration. C. Storm control is configured for the switch as a whole but operates on a per-port basis. creating excessive traffic and degrading network performance. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces. Reference: http://www. B.1545 Dynamic Dynamic 2 2 FastEthernet0/5 FastEthernet0/5 QUESTION 116 While troubleshooting a network outage. and ARAP connections? A. D. multicast.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen. IP mobile .html QUESTION 117 Which command globally enables AAA on a device? A.7b00.7b00. or multicast packets.0010. storm control is disabled. or users issuing a denial-of-service attack can cause a storm. E. aaa new-model aaa authentication aaa authorization aaa accounting Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: To configure AAA authentication.cisco. You can also set the switch to shut down the port when the rising threshold is reached. By default. Reference: http://www. SLIP. enable AAA by using the aaa new-model global configuration command. B.

Reference: http://www.cisco.1x? A. B. This can include a PPP. or all methods defined are exhausted.pdf QUESTION 120 Refer to the exhibit.html QUESTION 119 Which authentication service is needed to configure 802. Reference: http://www. in sequence. 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. EXEC D. SLIP. or ARAP connection. Command authorization attempts authorization for all EXEC mode commands. 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. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server. .C. 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. Method lists enable you to designate one or more security protocols to be used for authorization. For detailed information on the authentication proxy feature. if that method fails to respond. A method list is simply a named list describing the authorization methods to be queried (such as RADIUS or TACACS+). Network — Applies to network connections. Reverse Access — Applies to reverse Telnet sessions. Method lists are specific to the authorization type requested: Auth-proxy — Applies specific security policies on a per-user basis. the Cisco IOS software selects the next method listed in the method list. RADIUS with EAP Extension TACACS+ RADIUS with CoA RADIUS using VSA Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: With 802. Because the switch acts as the proxy.1x. When you create a named method list. the authentication service is transparent to the client.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/12-1_19_ea1/ configuration/guide/2940scg_1/sw8021x. you are defining a particular list of authorization methods for the indicated authorization type.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathor. including global configuration commands. C. This process continues until there is successful communication with a listed authorization method. the authentication server — performs the actual authentication of the client. associated with a specific privilege level.cisco. EXEC — Applies to the attributes associated with a user EXEC terminal session. D. Cisco IOS software uses the first method listed to authorize users for specific network services.

which lists none as the authentication method. in which order does the device check the login credentials? . B. When a network administrator is attempting an SSH connection to the device. meaning that credentials are not required and all sessions are allowed access immediately. QUESTION 121 Refer to the exhibit. None means no authentication.Which login credentials are required when connecting to the console port in this output? A. C. D. none required 115sernamee 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.

C. so here the “aaa authentication login default group radius local line” means to use RADIUS first. Utilizes the DHCP snooping binding database to validate subsequent requests from untrusted hosts.A. D. 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. D. line password. Reference: http://www. Dynamic ARP Inspection storm control VTP pruning DHCP snooping Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: . C.” The AAA default login preference is stated in order from first to last. D. QUESTION 122 Which type of information does the DHCP snooping binding database contain? A. local username. C. Rate-limits DHCP traffic from trusted and untrusted sources.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/ book/snoodhcp. Builds and maintains the DHCP snooping binding database. RADIUS server Line password. which contains information about untrusted hosts with leased IP addresses.pdf QUESTION 123 Which switch feature determines validity based on IP-to-MAC address bindings that are stored in a trusted database? A. B. then if that fails use the local user database. Finally.cisco. if that fails use the line password. B. local username Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: sessions use the vty lines. RADIUS server. local username. RADIUS server. where the configured authentication method is named “default. The DHCP snooping feature performs the following activities: Validates DHCP messages received from untrusted sources and filters out invalid messages. B. line password RADIUS server. local username Line password.

D.cisco. Before globally enabling DHCP snooping on the switch.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. B. Reference: http://www.cisco. B. C. the switch forwards the packet only if it is valid. Each promiscuous port can have several . If a Layer 2 LAN port is connected to a DHCP server.html QUESTION 125 Which private VLAN access port belongs to the primary VLAN and can communicate with all interfaces.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/72846-layer2secftrs-catl3fixed. You can have several promiscuous ports in a primary VLAN. If the ARP packet is received on a trusted interface. 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. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. the DHCP snooping binding database. On untrusted interfaces. including the community and isolated host ports.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/ book/snoodhcp. C. make sure that the devices acting as the DHCP server and the DHCP relay agent are configured and enabled. the switch forwards the packet without any checks.Explanation: Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a trusted database. The promiscuous port can communicate with all interfaces. including the community and isolated host ports? A. that belong to those secondary VLANs associated to the promiscuous port and associated with the primary VLAN. Reference: http://www. configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command. follow these guidelines: DHCP snooping is not active until you enable the feature on at least one VLAN. configure the port as trusted by entering the “ip dhcp snooping trust” interface configuration command. and enable DHCP globally on the switch. 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. D.

Reference: http://www. D. and the traffic from each isolated port also remains completely separate. isolated VLAN primary VLAN community VLAN promiscuous VLAN Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Understanding Primary. You can have more than one isolated port in a specified isolated VLAN. Isolated — An isolated port is a host port that belongs to an isolated secondary VLAN. Each isolated VLAN can have several isolated ports. 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. Traffic received from an isolated port is forwarded only to promiscuous ports. This port has complete isolation from other ports within the same private VLAN domain. DHCP snooping database B. You can also have secondary VLANs that are not associated to any promiscuous port. dynamic routing database . C.cisco. These interfaces are isolated from all other interfaces in other communities and from all isolated ports within the private VLAN domain. both isolated and community. You can configure multiple community VLANs in a private VLAN domain. and Community Private VLANs Primary VLANs and the two types of secondary VLANs (isolated and community) have these characteristics: Primary VLAN — The primary VLAN carries traffic from the promiscuous ports to the host ports. Isolated VLAN — An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. B. dynamic ARP database C.cisco. associated to that port. Isolated. You may want to do this for load-balancing or redundancy purposes. all the traffic remains isolated within each one. as long as the promiscuous port and secondary VLANs are within the same primary VLAN. or no secondary VLANs. but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN. Reference: http://www. Private VLANs block all traffic to isolated ports except traffic from promiscuous ports. The ports within one community can communicate.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.secondary VLANs. You can associate a secondary VLAN to more than one promiscuous port. Community — A community port is a host port that belongs to a community secondary VLAN. Community ports communicate with other ports in the same community VLAN and with associated promiscuous ports.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. and to other promiscuous ports.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs. You can configure multiple isolated VLANs in a private VLAN domain.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs. except that it can communicate with associated promiscuous ports. Each port is completely isolated from all other ports in the isolated VLAN.

B. Drops invalid ARP packets. 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. this error message appears: Static IP source binding can only be configured on switch port. DHCP snooping must be enabled on the access VLAN for that interface. Reference: http://www. Reference: http://www. storm control B. C. Verifies that a packet has a valid IP-to-MAC address binding before updating the ARP cache or forwarding the packet. If you are enabling IP source guard on a trunk interface with multiple VLANs and DHCP snooping is enabled on all the VLANs. D. 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. DAI can determine the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a DHCP snooping binding database.cisco.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. 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. which feature must be enabled on the access VLAN for that interface? A.1x port-based authentication is enabled. If you enter the ip source binding mac-address vlan vlan-id ip-address interface interface-id global configuration command on a routed interface. the source IP address filter is applied on all the VLANs.D. When IP source guard with source IP filtering is enabled on an interface.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15-0_2_EX/security/ configuration_guide/b_sec_152ex_2960-x_cg/b_sec_152ex_2960-x_cg_chapter_01110.cisco. It may also contain static entries that you have created.html QUESTION 128 When IP Source Guard with source IP filtering is enabled on an interface.html QUESTION 129 Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic? A. port security .

Reference: http://3c3cc. C.C. or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack. B. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast. multicast.html QUESTION 131 A network engineer configures port security and 802.1x on the same interface. VLAN trunking Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: A traffic storm occurs when packets flood the LAN. which creates excessive traffic and degrades network performance.com/c/en/us/td/docs/routers/7600/ios/122SR/configuration/guide/swcg/dos. 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. VTP pruning D.pdf QUESTION 130 Which command would a network engineer apply to error-disable a switchport when a packet-storm is detected? A. perform this task: Reference: http://www. D. Which option describes what .cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/ book/storm.

Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: 802. D. Reference: http://www. 802. C. If these addresses are saved in the configuration file. It allows 802. These can be dynamically learned or manually configured.1X and Port Security You can configure port security and 802.1x to secure the IP address that port security authenticates. B. so when you enable both on an interface. and added to the running configuration? A. the interface does not need to dynamically relearn them when the switch restarts.cisco. sticky dynamic static secure Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: With port security. Although sticky secure addresses can be manually configured. It allows port security to secure the IP address that 802. It allows port security to secure the MAC address that 802.1X is already preventing inbound traffic on the interface from unknown MAC addresses. static trunk ports destination port for SPAN EtherChannel port group dynamic access point Correct Answer: A Section: Infrastructure Security Explanation . it is not recommended.this configuration allows? A.html QUESTION 132 Which feature describes MAC addresses that are dynamically learned or manually configured.cisco.1x authenticates. B.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/25ew/configuration/guide/ conf/port_sec. B. and added to the running configuration.pdf QUESTION 133 On which interface can port security be configured? A. Port security secures the MAC addresses that 802.1x to secure the MAC address that port security authenticates. you can configure MAC addresses to be sticky. D. stored in the address table.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/ guide/sec_nx-os-cfg/sec_portsec.1x authenticates. D.1X processes packets before port security processes them. It allows 802.1X authenticates. C.1X on the same interfaces. 802. stored in the address table. C. Reference: http://www.

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. D. Trunk ports — You can configure port security on interfaces that you have configured as Layer 2 trunk ports. B. Host Ports: . promiscuous port isolated port community port access port Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: .Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. firewall or other common gateway device. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN.Explanation/Reference: Explanation: Port Security and Port Types You can configure port security only on Layer 2 interfaces. On an access port. which type of port must you configure the gateway router port as? A. B.Community Port (C-Port): Connects to the regular host that resides on community VLAN. D. This port can communicate with anything else connected to the primary or any secondary VLAN.wikipedia. port security applies only to the access VLAN. promiscuous community isolated trunked Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. This port communicates with P-Ports and ports on the same community VLAN. SPAN ports — You can configure port security on SPAN source ports but not on SPAN destination ports.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/ guide/sec_nx-os-cfg/sec_portsec. C. Ethernet Port Channels — Port security is not supported on Ethernet port channels.cisco. The device allows VLAN maximums only for VLANs associated with the trunk port. which port type connects the switch to the gateway router? A. This port communicates only with P-Ports. . VLAN maximums are not useful for access ports.org/wiki/Private_VLAN QUESTION 135 When you configure a private VLAN.html QUESTION 134 When you configure private VLANs on a switch. Promiscuous port (P-Port): The switch port connects to a router. In other words. C. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port). Reference: http://en. Reference: http://www.

The topology diagram indicates their layer 2 mapping. . it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. You must use the available IOS switch features.Community Port (C-Port): Connects to the regular host that resides on community VLAN. Reference: http://en.120. Host Ports: . This port communicates only with P-Ports.40.0/24. firewall or other common gateway device.0/24 should be allowed on VLAN 20. In other words. This port communicates with P-Ports and ports on the same community VLAN. You have been tasked with implementing the above access control as a pre-condition to installing the servers.org/wiki/Private_VLAN Q32 SIMULATION SWITCH. • Packets from devices in any other address range should be dropped on VLAN 20. DSW1 and ASW1.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches. For security reasons. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server. Authentication is to be done via a Radius server: • Radius server host: 172. .wikipedia. This port can communicate with anything else connected to the primary or any secondary VLAN.40.Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. The Radius server and application servers will be installed at a future date. Corporate polices do not allow layer 3 functionality to be enabled on the switches.46 • Radius key: rad123 • Authentication should be implemented as close to the host as possible. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port).120. • Packets from devices in the subnet of 172. • Devices on VLAN 20 are restricted to the subnet of 172. • Filtering should be implemented as close to the serverfarm as possible. 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.40.120. Promiscuous port (P-Port): The switch port connects to a router.Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port.

0.39.255 .Answer: The configuration: Step1: Console to ASW1 from PC console 1 ASW1(config)#aaa new-model ASW1(config)#radius-server host 172.46 key rad123 ASW1(config)#aaa authentication dot1x default group radius ASW1(config)#dot1x system-auth-control ASW1(config)#inter fastEthernet 0/1 ASW1(config-if)#switchport mode access ASW1(config-if)#dot1x port-control auto ASW1(config-if)#exit ASW1#copy run start Step2: Console to DSW1 from PC console 2 DSW1(config)#ip access-list standard 10 DSW1(config-ext-nacl)#permit 172.40.0 0.120.0.120.

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 136 SIMULATION SWITCH. Authentication is to be done via a Radius server: Radius server host: 172. For security reasons.46 Radius key: rad123 Authentication should be implemented as close to the host as possible. You must use the available IOS switch features. it is necessary to restrict access to VLAN 20 in the following manner: Users connecting to VLAN 20 via portfO/1 on ASW1 must be authenticated before they are given access to the network. The Radius server and application servers will be installed at a future date.40. The topology diagram indicates their layer 2 mapping. You have been tasked with implementing the above access control as a pre-condition to installing the servers.120.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches.0/24 should be allowed on VLAN 20.40.120.0/24.120. Packets from devices in the subnet of 172. Corporate polices do not allow layer 3 functionality to be enabled on the switches. Filtering should be implemented as close to the serverfarm as possible. .40. Packets from devices in any other address range should be dropped on VLAN 20. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server. DSW1 and ASW1. Devices on VLAN 20 are restricted to the subnet of 172.

Correct Answer: Here is the solution below Section: Infrastructure Security Explanation Explanation/Reference: The configuration: Step1: Console to ASW1 from PC console 1 ASW1(config)#aaa new-model ASW1(config)#radius-server host 172.46 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 .120.39.

cisco. For each interface configured for hot standby.40.1_19_ea1/ configuration/guide/swhsrp. D. B. the hot standby priority on the device on which tracking has been configured decreases by 10. B. its state changes do not affect the hot standby priority of the configured device.com/en/US/docs/switches/lan/catalyst3550/software/release/12.0.0 0. D. 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.ASW1#copy run start Step2: Console to DSW1 from PC console 2 DSW1(config)#ip access-list standard 10 DSW1(config-ext-nacl)#permit 172.255 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.html QUESTION 138 What is the default HSRP priority? A. When a tracked interface fails. 50 100 120 1024 Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: Explanation: . If an interface is not tracked. C. you can configure a separate list of interfaces to be tracked. Reference: http://www. C.120.0.

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

Explanation: A comparison of the three First Hop Redundancy Protocols are listed below: .

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B. Gateways are assigned the next MAC address in sequence.cisco. active virtual router .wordpress.1_19_ea1/ configuration/guide/swhsrp. C.html QUESTION 142 What is the maximum number of virtual MAC addresses that GLBP allows per group? A. Other members of the GLBP group learn the virtual MAC addresses from hello messages. the hot standby priority on the device on which tracking has been configured decreases by 10. A virtual forwarder that has learned the virtual MAC address is referred to as a secondary virtual forwarder.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. B. Other group members request a virtual MAC address after they discover the AVG through hello messages.com/2008/08/23/router-high-availability-protocol-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? A. If an interface is not tracked. The AVG is responsible for assigning the virtual MAC addresses to each member of the group. 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. C. active virtual forwarder B. Reference: http://www. A virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder. you can configure a separate list of interfaces to be tracked. Reference: http://www.html#wp1039651 QUESTION 143 Which gateway role is responsible for answering ARP requests for the virtual IP address in GLBP? A.com/en/US/docs/switches/lan/catalyst3550/software/release/12. D.Reference: http://cciethebeginning. When a tracked interface fails. For each interface configured for hot standby. D.cisco. its state changes do not affect the hot standby priority of the configured device. 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.

Primary IP Address An IP address selected from the set of real interface addresses. etc. will respond to packets addressed to one of these IP addresses for ICMP pings. B. active virtual gateway D. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses. 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. when up. One possible selection . These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address.cisco. IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address(es’. TCP connections. Other group members provide backup for the AVG in the event that the AVG becomes unavailable. The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address. C. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN. The AVG assigns a virtual MAC address to each member of the GLBP group.C. This is the router that. D.html QUESTION 144 Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router? A. 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. Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN. It may participate in one or more virtual routers. Reference: http://www.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. A VRRP Router may backup one or more virtual routers.

B.org/rfc/rfc3768. 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. C.com/en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp-hsrp-mgo. Virtual Router Master The VRRP router that is assuming the responsibility of forwarding packets sent to the IP address(es) associated with the virtual router. and answering ARP requests for these IP addresses. Reference: http://www.txt QUESTION 145 Which command correctly configures standby tracking for group 1 using the default decrement priority value? A. . Reference: http://www. then it will always become the Master. D. HSRP client groups follow the master HSRP with a slight. QUESTION 146 Which command configures an HSRP group to become a slave of another HSRP group? A. Note that if the IP address owner is available.cisco. The “standby follow” command configures an HSRP group to become a slave of another HSRP group. C. D.html QUESTION 147 Refer to the exhibit. B. VRRP advertisements are always sent using the primary IP address as the source of the IP packet.ietf. There is no need to explicitly state the value if the desired value is the default value.algorithm is to always select the first address. 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. random delay so that all client groups do not change at the same time.

shtml#dr QUESTION 148 Ferris Plastics. When configuring the multicast boundary command. then some other device with a MAC address reports this error message. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Inc.0. C. B.com/en/US/products/hw/switches/ps708/ products_configuration_example09186a00807d2520. then it indicates that this router is receiving its own hello packets sent. you have been asked to investigate and respond to the following question.255. Currently all interfaces are up. DSW1 – primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 – primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. The distribution switches are configured to use HSRP to provide a high availability solution. If the MAC address of the interface is the same as the one reported in the error message.Which option describes the reason for this message in a GLBP configuration? A.0 15.0. is a medium sized company.255. If the interface MAC address is different from the one reported in the error message.102 and User Datagram Protocol (UDP) port 3222 (source and destination).255. Verify the spanning-tree topology and check if there is any layer2 loop.0. unless GigabitEthernet1/0/1 on backup device has also failed. Reference: http://www. 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. In order to resolve this issue. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues. with an enterprise network (access.cisco. permit the Multicast address by permit 224. Using the running configurations and show commands. issue the show interface command to verify the MAC address of the interface. D.0. . Troubleshooting has identified several issues. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224.

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

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During this time. Inc. D.During routine maintenance. DSW1 – primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 – primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as . All other interfaces were up. You have determined that there is an issue with the decrement value in the track command for the VLAN 102 HSRP group. The distribution switches are configured to use HSRP to provide a high availability solution. E. QUESTION 150 Ferris Plastics. is a medium sized company. The decrement value on DSW1 should be greaterthan 5 and less than 15. Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Use “show run” command to show. we should decrement value in the track command from 11 to 18. The decrement value on DSW1 should be greaterthan 11 and less than 19. The decrement value on DSWTs should be greaterthan 195 and less than 205. What needs to be done to make the group function properly? A. The decrement value on DSWTs should be greaterthan 190 and less than 200. The left Vlan102 is console1 of DS1. Because 200 – 11 = 189 < 190 (priority of Vlan102 on DS2). C. Priority value is 200. 0 The decrement value on DSW1 should be greaterthan 9 and less than 15. DSW1 remained the active device for the VLAN 102 HSRP group. B. with an enterprise network (access. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1.

unless GigabitEthernet1/0/1 on backup device has also failed. Using the running configurations and show commands.the primary device. Troubleshooting has identified several issues. Currently all interfaces are up. . you have been asked to investigate and respond to the following question.

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

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

During routine maintenance, it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1
and DSW2. All other interfaces were up. During this time, DSW1 became the active router for the VLAN
104HSRP group. As related to the VLAN 104HSRP group, what can to be done to make the group function
properly?
A.
B.
C.
D.

On DSW1, disable preempt.
On DSW2 decrease the priority value to a value less than 150.
On DSW1, increase the decrement value in the track command to a value greater than 6.
On DSW1, decrease the decrement value in the track command to a value less than 1.

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

We should NOT disable preempt on DS1. By do that, you will make Vlan104’s HSRP group fail function.
Example: if we are disable preempt on DS1. It can not become active device when G1/0/1 on DS2 fail. In this
question, G0/1/0 on DS1 & DS2 is shutdown. Vlan104 (left): 150 – 1 = 149. Vlan104 (right): 200 – 155 = 145.
Result is priority 149 > 145 (Vlan104 on DS1 is active). If increase the decrement in the track value to a value
greater than 6 (> or = 6). Vlan104 (left): 150 – 6 = 144. Result is priority 144 < 145 (vlan104 on DS2 is active).
QUESTION 152
Ferris Plastics, Inc. is a medium sized company, with an enterprise network (access, distribution and core
switches) that provides LAN connectivity from user PCs to corporate servers. The distribution switches are
configured to use HSRP to provide a high availability solution.
DSW1 – primary device for VLAN 101 VLAN 102 and VLAN 105
DSW2 – primary device for VLAN 103 and VLAN 104

A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as
the primary device, unless GigabitEthernet1/0/1 on backup device has also failed.
Troubleshooting has identified several issues. Currently all interfaces are up. Using the running configurations
and show commands, you have been asked to investigate and respond to the following question.

50 100 150 200 Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Use "show standby brief" command on console2. QUESTION 153 Ferris Plastics. DSW1 .primary device for VLAN 101 VLAN 102 and VLAN 105 D–W2 . Very easy to se“ priority of Vlan1”5 is 100. C. Inc. is a medium sized company. D. with an enterprise network (access. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. B. The distribution switches are configured to use HSRP to provide a high availability solution.What is the priority value of the VLAN 105 HSRP group on DSW2? A.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 .

Using the running configurations and show commands.the primary device. unless GigabitEthernet1/0/1 on backup device has also failed. Currently all interfaces are up. Troubleshooting has identified several issues. you have been asked to investigate and respond to the following question. .

the current priority for VLAN 105 is 100.If GigabitEthemet1/0/1 on DSW2 is shutdown. . C. B. and the tracking feature for Gig 1/0/0 is enabled which will decrement the priority by 10 if this interface goes down for a priority value of 90. 90 100 150 200 Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation As seen below. what will be the resulting priority value of the VLAN 105 HSRP group on router DSW2? A. D.

. 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.

.

10. R1-0% B.What percentage of the outgoing traffic from the 172.16.0/24 subnet is being forwarded through R1? A. R2-50% C. R2-100% . R1-50 %.

D. 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. . so all outgoing traffic will be forwarded to R1. we see that R1 is the active standby router for the Ethernet 0/0 link. They have questions about how these two devices will perform in the event of a device failure. R1-100% Correct Answer: D Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Based on the following output.

.

Refer to the exhibit. The interface will have the priority decremented by 60 for HSRP group 1 . B. which of the statement regarding HSRP priority is true? A. The interface will have the priority decremented by 40 for HSRP group 1. If router R1 interface Etherne0/0 goes down and recovers.

. 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. However. The interface will have its current priority incremented by 60 for HSRP group 1 E. The interface will have its current priority incremented by 40 for HSRP group 1 D. 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: Here. when it comes back up. when the Ethernet 0/0 interface goes down. They have questions about how these two devices will perform in the event of a device failure. the standby 1 track decrement command will lower the priority from 130 to 90.C. it will then increment it by 40 back to 130 for HSRP group 1.

.

What issue is causing Router R1 and R2 to both be displayed as the HSRP active router for group 2? A. The HSRP Hello packets are blocked . The HSRP group authentication is misconfigured C. The HSRP group number mismatch B.

The HSRP timers mismatch E.D. . 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: This can be further verified by issuing the “show standby” command on each router. 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. .

.

0000.0000.ac02 B. 4000.0c07.0010 C.0c07. 0000.ac01 .What is the virtual mac-address of HSRP group 1? A.

ac02 F. 4000.0000. .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 4000.0000. 4000.0010 as shown below: QUESTION 158 Refer to the exhibit.D.0000.0c07.ac01 E. 0000.

F. B. D.) A. Which command can prevent BPDU transmission on this port? A. The local switch is overloaded with the amount of sourced traffic that must be replicated to the remote switch. traffic is not being replicated to the remote switch. however. LACP system priority LACP port priority interface MAC address system ID port number hot-standby link identification number interface bandwidth Correct Answer: ABDE Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 160 RSPAN has been configured on a Cisco Catalyst switch.When troubleshooting a network problem. The local RSPAN switch is replicating only Rx traffic to the remote switch. C. B. Which type of misconfiguration is a cause? A. B. C. Correct Answer: A . 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. The RSPAN designated VLAN is missing the remote span command. E. C. The local and remote RSPAN switches are configured using different session IDs. G. a network analyzer is connected to Port f0/1 of a LAN switch. D. D.

a network engineer decides to create a separate spanning tree for every group of 10 VLANs. B. end user connectivity is still required. a Network Administrator noticed that one port stops receiving UDLD packets. C. D. B. This port continues to reestablish until after eight failed retries. BPDUblock BPDUfilter BPDUignore BPDUguard BPDUdisable Correct Answer: B Section: Mix QUESTIONS Explanation . C. however. D. Which version of spanning tree is appropriate to meet the company policy? A. Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 162 To follow the Layer 2 switching guidelines. Normal UDLD operations that prevent traffic loops. UDLD port is configured in aggressive mode.Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 161 After UDLD is implemented. Which spanning-tree feature accomplishes this? A. E. The engineer does not want this switch participating in Spanning Tree with the rest of the network. 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. The port then transitions into the errdisable state. Which option describes what causes the port to go into the errdisable state? A. C. B. UDLD is enabled globally. D. UDLD timers are inconsistent. E.

D. A sticky MAC address ages out of the MAC address table after 600 seconds. Configure a SPAN session to monitor the received traffic on interface g0/4 for all VLANs except VLAN 3. B. A sticky MAC address can be a unicast or multicast address. Configure a SPAN session to monitor the received traffic on interface g0/5 only for VLAN 3.Explanation/Reference: QUESTION 164 Refer to the exhibit. D. Configure a SPAN session to monitor the received traffic on interface g0/4 only for VLAN 3. reload shutdown write memory backup config Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 166 Which statement about the MAC address sticky entries in the switch when the copy run start command is entered is true? A. D. Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: . C. B. B. Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 165 When SDM templates are configured. C. What is the result of the SPAN configuration on a Cisco switch? A. which action must be performed for the configuration to take effect? A. A sticky MAC address is retained when the switch reboots. Configure a SPAN session to monitor the received traffic on interface g0/5 for all VLANs except VLAN 3. A sticky MAC address is lost when the switch reboots. C.

BPDU filtering BackboneFast EtherChannel BPDU guard Correct Answer: D Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 168 Refer to the exhibit. C. Which configuration ensures that the Cisco Discovery Protocol packet update frequency sent from DSW1 to ALS1 is half of the default value? A. D. DSW1(config)#cdp timer 90 DSW1(config-if)#cdp holdtime 60 DSW1(config)#cdp timer 30 DSW1(config)#cdp holdtime 90 DSW1(config-if)#cdp holdtime 30 DSW1(config-if)#cdp timer 60 Correct Answer: C . C. B. F. D. B. E.QUESTION 167 Enablement of which feature puts the port into err-disabled state when the port has PortFast enabled and it receives BPDUs? A.

It can cause a network-wide VLAN configuration change if the revision number on the new switch is lower. C. B. It can cause a network-wide VLAN configuration change if the revision number on the new switch is higher. It can cause routing loops. B. C. They remain up. but they are reassigned to the default VLAN. D. Which state are these interfaces in after the VLAN is deleted? A. B. but they are reassigned to the native VLAN. They go down until they are reassigned to a VLAN. and then the VLAN is deleted. Which version of VTP supports these extended VLANs? . They go down.Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 169 Interfaces are assigned to a VLAN. Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 170 Which feature is automatically configured when an administrator enables a voice VLAN? A. 802. Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 172 A network administrator configures 10 extended VLANs ranging from VLANs 3051 to 3060 in an enterprise network. D.1Q trunking PortFast QoS private VLANs Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 171 Which statement describes one major issue that VTP can cause in an enterprise network when a new switch is introduced in the network in VTP mode server? A. C. They remain up. D. but they are reassigned to the default VLAN. It can cause network access ports to go into err-disabled state.

D. B. The IP address is placed on the lowest numbered member port. active auto desirable on passive Correct Answer: AE Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 174 When a Layer 2 EtherChannel is configured. D.) A. The IP address is assigned via DHCP only. D. version 1 version 2 version 3 VTP does not recognize extended VLANs. D. If the EtherChannel mode on switch 1 is configured to active. which two modes on switch 2 establish an operational EtherChannel? (Choose two. C.A. E. The IP address is placed on the highest numbered member port. which statement about placement of the IP address is true? A. Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 175 Which option is valid for EtherChannel load balancing? A. B. C. C. B. Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 173 An engineer is configuring an EtherChannel between two switches using LACP. B. source MAC address and source IP address destination MAC address and destination IP address source MAC address and destination IP address source MAC address and destination MAC address . C. The IP address is placed on the port-channel logical interface.

Correct Answer: D
Section: Mix QUESTIONS
Explanation
Explanation/Reference:
QUESTION 176
Refer to the exhibit.

An engineer is configuring EtherChannel between two switches and notices the console message on switch 2.
Based on the output, which option describes the reason for this error?
A.
B.
C.
D.

Switch 1 does not have enough member ports configured.
Switch 2 has too many member ports configured.
The port channel interface numbers do not match.
The EtherChannel protocols do not match.

Correct Answer: D
Section: Mix QUESTIONS
Explanation
Explanation/Reference:
QUESTION 177
Refer to the exhibit.

DSW1 should share the same MST region with switch DSW2. Which statement is true?
A.
B.
C.
D.

Configure DSW1 with the same version number, and VLAN-to-instance mapping as shown on DSW2.
DSW2 uses the VTP server mode to automatically propagate the MST configuration to DSW1.
DSW1 automatically inherits MST configuration from DSW2 because they have the same domain name.
Configure DSW1 with the same region name, revision number, and VLAN-to-instance mapping as shown
on DSW2.
E. DSW1 is in VTP client mode with a lower configuration revision number, therefore, it automatically inherits
MST configuration from DW2.
Correct Answer: D
Section: Mix QUESTIONS
Explanation
Explanation/Reference:
QUESTION 178
Which two statements about SPAN source and destination ports during an active session are true? (Choose
two.)
A.
B.
C.
D.
E.

The source port can be only an Ethernet physical port.
The source port can be monitored in multiple SPAN sessions.
The destination port can be destination in multiple SPAN sessions.
The destination port does not participate in STP.
You can mix individual source ports and source VLANs within a single session.

Correct Answer: BD

Section: Mix QUESTIONS
Explanation
Explanation/Reference:
QUESTION 179
In a switch stack environment, what is the total bidirectional traffic flow between two logical counter-rotating
paths?
A.
B.
C.
D.

16 Gbps
32 Gbps
64 Gbps
128 Gbps

Correct Answer: B
Section: Mix QUESTIONS
Explanation
Explanation/Reference:
QUESTION 180
Refer to the exhibit.

Which statement about the SPAN and RSPAN configuration on SW1 is true?
A.
B.
C.
D.

SPAN session 2 only monitors egress traffic exiting port FastEthernet 0/14.
RSPAN session 1 monitors activity on VLAN 50 of a remote switch.
RSPAN session 1 is incompletely configured for monitoring.
SPAN session 2 monitors all traffic entering and exiting port FastEthernet 0/15.

Correct Answer: C
Section: Mix QUESTIONS
Explanation
Explanation/Reference:

D. VLAN database DHCP snooping database spanning trees routing information Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 182 Which option is the minimum number of bindings that the DHCP snooping database can store? A. off . C. C. disabled B. D.QUESTION 181 Which information does the subordinate switch in a switch stack keep for all the VLANs that are configured on it? A. B. what is the state of port security on a switch? A. B. D. C. Layer 1 Layer 2 Layer 3 Layer 7 Correct Answer: B Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 184 By default. on C. B. 1000 bindings 2000 bindings 5000 bindings 8000 bindings Correct Answer: D Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 183 On which layer does IP source guard provide filtering to prevent a malicious host from impersonating the IP address of a legitimate host? A.

one standby router.1. HSRP is the preferred protocol to be used on multivendor environments.) A. HSRP supports up to 255 groups on the same switch or router. VRRP is a Cisco proprietary protocol. B. and VRRP are true? (Choose two. GLBP allows for a maximum of four MAC addresses per group. and many listening routers. C. B. learning Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 185 Which two statements about HSRP.1 a hardware problem Correct Answer: B Section: Mix QUESTIONS . GLBP.D. Which option is the most likely explanation of the duplicate address message logged? A.10. VRRP has one master router. spanning-tree loop HSRP misconfiguration a PC with IP of 10. C. D. Correct Answer: CD Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 186 Refer to the exhibit. E. D.

Explanation Explanation/Reference: QUESTION 187 DRAG DROP Drag and drop the characteristic from the left to the matching Layer 2 protocol on the right. Select and Place: Correct Answer: .

C. The encapsulation type is incorrect. B. . The switchport mode trunk command should be first in the output. is no longer working. such as CDP and VTP. The native VLAN is not present on the trunk. What is wrong with the configuration? A. After applying the settings on the uplinks to the core switches.Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 188 Refer to the exhibit. The interface is administratively down. The standard configuration is used for each uplink. the switch control traffic. A network engineer changes the default native VLAN to VLAN 999. D.

C. B. C. Correct Answer: AD Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 190 An access switch at a remote location is connected to the spanning-tree root with redundant uplinks. Spanning tree determines the priority of the current root for VLAN 50 and reduces the priority of the local switch to a lower value. Which action accomplishes this task? A. What action will accomplish this task? A. C. The engineer decides to force the secondary link to be the desired forwarding root port. D. adjust STP priority to the maximum value disable STP globally apply root guard to all outgoing neighbor interfaces enable MSTP and use a different revision number than all other switches . Enable Rapid Spanning Tree to converge using the secondary link. Adjust the secondary link to have a lower priority than the primary link. Correct Answer: C Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 191 A network engineer wants to make sure that an access switch will never become a Spanning Tree root for VLAN 5.) A. The switchport that is configured for VLAN 50 is the primary connection to the spanning-tree root switch. Change the link-type to point-to-point. Correct Answer: D Section: Mix QUESTIONS Explanation Explanation/Reference: QUESTION 189 Which two options are two results of using the command spanning-tree vlan 50 root primary within a spanningtree network under global configuration? (Choose two. D. D. E. All ports that are configured on the current switch with VLAN 50 transition to designated ports. The priority value for VLAN 50 is set to 4094 on the root while the local switch priority is set to 32768. A network engineer notices that there are issues with the physical cabling of the current root port. B. The control traffic must be manually enabled on the new native VLAN.E. B. Apply a BPDU filter on the primary interface of the remote switches. The spanning-tree timers are reduced to improve the convergence time for VLAN 50.

Correct Answer: A Section: Mix QUESTIONS Explanation Explanation/Reference: .