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QUESTION 26
You have just enabled IS-IS on the lab testing network. You notice that IS-IS is not using the optimal path selection based on the interface bandwidth. Currently, the IS-IS routing process seems to be selecting the best path based on the hop count.
What configuration change can you make to cause IS-IS to select the optimal path based on the interface bandwidth?
A. Enable a wide-style IS-IS metric.
B. Enable a narrow-style IS-IS metric.
C. Change the default auto-cost reference bandwidth to a higher value.
D. Change the default IS-IS metric on each of the router interfaces to better correspond to the interface bandwidth.
E. Change the interface bandwidth by using the bandwidth interface configuration mode command.

Correct Answer: D
QUESTION 27
You have installed a new router and configured OSPF on it. However, this new router is not able to establish an OSPF neighbor relationship with the neighbor OSPF router. Which four conditions could cause this problem? (Choose four.)
A. mismatched OSPF hello/dead interval between the new router and the neighbor router
B. mismatched OSPF area ID between the new router and the neighbor router
C. mismatched OSPF authentication data between the new router and the neighbor router
D. mismatched OSPF router ID between the new router and the neighbor router
E. mismatched interface MTU between the new router and the neighbor router
F. mismatched interface bandwidth between the new router and the neighbor router

Correct Answer: ABCE
QUESTION 28
Refer to the Cisco IOS XR configuration exhibit.

Which statement about the configuration is true?
A. This is a Level-2-only router.
B. This is a Level-1-only router.
C. The maximum IS-IS path metric is 63.
D. This router belongs to area ID 0001.
E. This configuration is missing the net configuration for the IPv6 unicast address family.

Correct Answer: D
QUESTION 29
Which statement about the benefits of MPLS PHP is true?
A. PHP is implemented to increase the performance on the egress edge LSR. PHP allows the egress edge LSR to perform only one lookup to route the IP packet based on destination IP address and routing table.
B. PHP is implemented to increase the performance on the egress edge LSR. PHP enables the egress edge LSR to perform only one lookup based on the ingress label.
C. PHP is implemented to increase the performance on the egress edge LSR. PHP enables the egress edge LSR to perform two lookups, first lookup based on the ingress label and a second route lookup
based on the destination IP address.
D. PHP is implemented to increase the performance on the LSR (P routers). PHP enables the LSR (P routers) to perform only one lookup based on the ingress label.
E. PHP is implemented to increase the performance on the LSR (P routers). PHP enables the LSR (P routers) to perform only one route lookup based on the destination IP address.
F. PHP is implemented to increase the performance on the LSR (P routers). PHP enables the LSR (P routers) to perform two lookups, first lookup based on the ingress label and a second route lookup based on the destination IP address.
G. PHP is implemented to increase the performance on the ingress edge LSR. PHP enables the ingress edge LSR to perform only one lookup based on the ingress label.
H. PHP is implemented to increase the performance on the ingress edge LSR. PHP enables the ingress edge LSR to perform two lookups, first lookup based on the ingress label and a second route lookup based on the destination IP address.

Correct Answer: A
QUESTION 30
Refer to the exhibit.

Which three statements about MPLS LDP operations are true?
A. The incoming label for 10.2.10.1/32 is 16010 (which is allocated by the local router), and the outgoing label is 22 (as advertised by the next-hop router).
B. The 16003 and 16010 labels are learned from the 192.168.112.40 LDP neighbor.
C. The ImpNull outgoing label for the 192.168.102.0/24 network means that the outgoing label should be removed when sending packets to the 192.168.112.40 next-hop router, when the incoming label is 16003.
D. The ImpNull outgoing label for the 192.168.102.0/24 network means that the local router has not received a label for that network from its neighbor.
E. The Unlabeled outgoing label for 10.10.10.100/32 indicates that a label pop is required when sending packets to the 10.10.10.1 next-hop router.
F. The outgoing label of 22 for 10.2.10.1/32 is learned from the 192.168.112.40 LDP neighbor.

Correct Answer: ACF

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