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Cisco CCIP 642-661 Practice Exam (91-95)

In a Transit AS, how do the internal routers within the Transit AS forward packets destined for the external networks using a scalable solution?
A. using the default route
B. using the IBGP routes, then using recursive lookup based on IGP information to resolve the BGP next-hop
C. using the EBGP routes where the external networks are redistributed into the IBGP by the edge routers
D. using the IGP routes where the external networks are redistributed into the IGP by the edge routers
Answer: B

Who should use private AS numbers?
A. multihomed customers who configured their AS as a transit AS
B. customers connected to a single ISP using a single permanent link
C. customers multihomed to a single ISP using multiple permanent links
D. customers multihomed to two different ISPs
Answer: C

Refer to the Exhibit. How can Provider B move to AS 601 without forcing Customer A to immediately reconfigure?
A. Customer A must update its BGP neighbor statements or the BGP sessions will no longer match.
B. Originate a default route from the Provider A network into the customer network. This will draw routed traffic into the provider network.
C. Configure a confederation between Customer A and the provider networks. Use the BGP translate AS feature at the edge of the confederation.
D. Configure a second BGP AS on the Provider B router. Use the local AS feature with the dual-as keyword.
E. Add a wide area link between Provider A and Customer A configured for eBGP peering. Configure the customer BGP to prevent it from becoming a transit network.
Answer: D

What is the effect on existing BGP connections when Path MTU (PMTU) discovery is enabled?
A. The connections are reset and negotiate MTU size.
B. There is no effect on existing connections.
C. After timing out, they will inherit the configured MTU size.
D. They dynamically renegotiate the new MTU size.
Answer: B

Router # show ip bgp BGP routing table entry for, version 15 Paths: (2 available, best #2, table Default-IF-Routing-Table)
Advertised to non peer-group peers: 65100 from ( Origin IGP, metric 0, localpref 100, valid, internal 65100 from ( Origin IGP, metric 0, localpref 100, valid, external, best
Based on the output shown in the exhibit, which two statements are correct? (Choose two)
A. The eBGP route to is preferred over the iBGP route to
B. is an iBGP peer.
C. is an iBGP peer.
D. is an eBGP peer.
Answer: A,C