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Cisco CCIP 642-661 Practice Exam (56-60)

QUESTION NO: 56
You are a help desk trainee for your company. A potential customer inquires that if the core routers within a transit AS are running both Internal BGP and IGP, and the edge routers within the transit AS are applying the next-hop-self option to set up the IBGP sessions. Which of the following could be deployed to promote the routing performance to all external prefixes?
A. Adopt route reflectors within the core
B. Qualify CEF on all the core and edge routers
C. disable BGP synchronization on all the core routers
D. Qualify route redistribution from IGP into BGP
Answer: B

QUESTION NO: 57
What is the proper configuration to enable route reflector redundancy?
A. To avoid a single point of failure, IBGP full mesh can be used between all the clients in a cluster.
B. To avoid a single point of failure, a route reflector client can have IBGP sessions to more than one route reflector within the cluster.
C. To avoid a single point of failure, a route reflector client can have IBGP sessions to other clients in another cluster.
D. To avoid a single point of failure, a route reflector client have IBGP sessions to other route reflectors in another cluster.
Answer: B

QUESTION NO: 58
Which prefix-list will permit the 172.16.1.32 255.255.255.240 prefix?
A. ip prefix-list test permit 172.0.0.0/8 le 30
B. ip prefix-list test permit 172.16.1.0/28
C. ip prefix-list test permit 172.16.0.0/16 eq 28
D. ip prefix-list test permit 172.0.0.0/8 ge 29
Answer: A

QUESTION NO: 59
You work as a network engineer. You are troubleshooting a BGP neighbor relationship in which the neighbor relationship has gone down. You issue the following command:
show ip bgp summary
You see the string “PfxCt” and Idle appear in the State/PfxRcd field.
What could be the cause of this issue?
A. The neighbor has been manually shutdown.
B. The maximum prefix limit had been set and exceeded.
C. The interface on the neighbor router is down.
D. There is a problem with the service provider.
Answer: B

QUESTION NO: 60
What can cause a single sourced iBGP route not to be selected as the best route?
A. The BGP origin is incomplete.
B. BGP synchronization is disabled.
C. The BGP local preference is 0.
D. The BGP next-hop is unreachable.
E. The BGP weight is 0.
F. The BGP MED is 0.
Answer: D