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CCIE Routing and Switching Written Exam v5.1

QUESTION 861

Which two methods can you use to limit the range for EIGRP queries? (Choose two.)

 

A.

Use an access list to deny the multicast address 224.0.0.1 outbound from select EIGRP neighbor and permit everything else.

B.

Configure route tagging for all EIGRP routes.

C.

Summarize routes at the boundary routers of the EIGRP domain.

D.

Configure unicast EIGRP on all routers in the EIGRP domain.

E.

Configure stub routers in the EIGRP domain.

F.

Use an access list to deny the multicast address 224.0.0.10 outbound from select EIGRP neighbors and permit everything else.

 

Correct Answer: CE

 

 

QUESTION 862

Which two best practices does Cisco recommend to migrate a network from PVST+ to MST? (Choose two.)

 

A.

Start the migration at the edge nodes and work toward the root bridge.

B.

Before starting the transition, configure one of the edge nodes with a lower priority so that it becomes the root bridge after the transition.

C.

Before starting the transition, ensure that at least two nodes act as the root bridge for all VLANs in the network.

D.

Start the migration at the root bridge and work toward the edge nodes.

E.

Before starting the transition, configure one of the edge nodes with a higher priority so that it becomes the root bridge after the transition.

F.

Before starting the transition, ensure that one node is the root bridge for all VLANs in the network.

 

Correct Answer: AF

 

 

QUESTION 863

Refer to the exhibit. Which two statements about this egress queue are true? (Choose two.)

 

clip_image002

 

A.

The queue 3 buffer is allocated 20 percent, its drop threshold is 100 percent, and it is guaranteed 400 percent of memory.

B.

The queue 1 buffer is allocated 30 percent, its drop threshold is 25 percent, and it is guaranteed 100 percent of memory.

C.

The queue 1 buffer is allocated 30 percent, its drop threshold is 100 percent, and it is guaranteed 150 percent of memory.

D.

The queue 2 buffer is allocated 30 percent, its drop threshold is 200 percent, and it can use at maximum 400 percent of memory.

E.

The queue 3 buffer is allocated 30 percent, its drop threshold is 100 percent, and it can use at maximum 400 percent of memory.

 

Correct Answer: BD

 

 

 

 

 

 

 

 

 

 

 

QUESTION 864

Refer to the exhibit. Which two route types are advertised by a router with this configuration? (Choose two.)

 

clip_image003

 

A.

connected

B.

external

C.

summary

D.

static

E.

redistributed

 

Correct Answer: AC

 

 

QUESTION 865

Refer to exhibit. The router is unreachable using telnet. Which option is solution?

 

clip_image005

 

A.

Use an extended access list instead of standard access list.

B.

The transport output telnet command must be added.

C.

The VRF configuration must be completed.

D.

The “vrf-also” keyword must be added to the access-class configuration.

 

Correct Answer: D

QUESTION 866

Refer to the exhibit. The Main1 and Branch1 switches are connected directly over an MPLS pseudowire, and both run UDLD. After router B1 reloads because of a power failure, the pseudowire is restored. However, the Branch1 switch is unable to reach the Main1 switch. Which two actions can you take to restore connectivity and prevent the problem from recurring? (Choose two.)

 

clip_image007

 

A.

Configure a backup pseudowire between the Main1 and Branch1 switches.

B.

Enable UDLD recovery on both the Main1 and Branch1 switches.

C.

Configure a backup GRE tunnel between the Main1 and Branch1 swiitches.

D.

Enable errdisable recovery on both the Main1 and Branch1 switches.

E.

Issue the shutdown and no shutdown commands on both the Branch1 switch´s uplink to the B1 router and the Main1 switch´s uplink to the M1 router.

F.

Issue the shutdown and no shutdown commands on the Branch1 switch uplink to the B1 router only.

 

Correct Answer: DF

 

 

QUESTION 867

Which measure does IS-IS use to avoid sending traffic with a wrong MTU configuration?

 

A.

IS-IS does not protect from MTU mismatch.

B.

MTU value is communicated in IS-IS Sequence Number PDUs (SNP), and IS-IS adjacency is not established if an MTU mismatch is detected.

C.

IS-IS uses path MTU discovery as specified in RFC 1063.

D.

IS-IS uses padding of hello packets to full MTU.

 

Correct Answer: D

Explanation:

Intermediate System-to-Intermediate System (IS-IS) hellos are padded to the full maximum transmission unit (MTU) size. The benefit of padding IS-IS Hellos (IIHs) to the full MTU is that it allows for early detection of errors due to transmission problems with large frames or due to mismatched MTUs on adjacent interfaces.

 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/integrated-intermediate-system-tointermediate-system-is-is/47201-isis-mtu.html

 

 

QUESTION 868

Which statement about the spanning-tree portfast feature on the switch is true?

 

A.

If an interface is enabled for portfast receives BDPU, the port goes through the spanning-tree listening, learning, and forwarding states.

B.

If an interface is enabled for portfast receives BDPU, the port does not go through the spanning-tree listening, learning, and forwarding states.

C.

If an interface is enabled for portfast receives BDPU, the port is shut down immediately.

D.

If an interface is enabled for portfast receives BDPU, the port goes into the spanning-tree inconsistent state.

 

Correct Answer: A

 

 

QUESTION 869

Refer to the exhibit. Which statement about the configuration is true?

 

clip_image009

 

A.

This configuration is incorrect because the dialer interface number must be the same as the dialer pool number.

B.

This configuration is missing an IP address on the dialer interface.

C.

This configuration is incorrect because the MTU must match the ppp-max-payload that is defined.

D.

This configuration represents a complete PPPoE client configuration on an Ethernet connection.

 

Correct Answer: D

 

 

 

QUESTION 870

A network engineer is extending a LAN segment between two geographically separated data centers. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing the extended LAN segment?

 

A.

Modify the spanning-tree priorities to dictate the traffic flow.

B.

Create a Layer 3 transit VLAN to segment the traffic between the sites.

C.

Use VTP pruning on the trunk interfaces.

D.

Configure manual trunk pruning between the two locations.

 

Correct Answer: C

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