4A0-102 Online Practice Questions and Answers

Why is a full mesh of iBGP peers required?

A. To ensure proper route propagation inside a transit AS.

B. To ensure that all routers are directly connected.

C. To ensure that all routers run iBGP inside a transit AS.

D. To maximize control plane scalability.

Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.

Assuming that none of the routers in AS 65540 is configured with "advertise-external", what is the expected output of "show router bgp routes on router R1?

A. Option A

B. Option B

C. Option C

D. Option D

Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.

Assuming that router R6 is configured with "advertise-external", what is the expected output of "show router bgp routes" when executed on router R1?

A. Option A

B. Option B

C. Option C

D. Option D

Click the exhibit.

Given the following configuration of router R1, what can be said about the function of each of AS 65540s routers?

A. Routers R1 and R2 are redundant route reflectors with clients R3 and R4.

B. Routers R3 and R4 are route reflectors with clients R1 and R2.

C. Router R1 is a route reflector with clients R2, R3 and R4.

D. Router R1 is a route reflector with clients R3 and R4.

What kind of BGP attribute is the Local Preference?

A. Optional transitive attribute.

B. Optional non-transitive attribute.

C. Well-known mandatory attribute.

D. Well-known discretionary attribute.

The configuration of an Alcatel-Lucent 7750 SR is given below. Router Rl has established BGP sessions with routers R2 and R3. Which of the following is TRUE?

A. Router R1forms an iBGP session with router R2, and an eBGP session with router R3.

B. Router R1forms iBGP sessions with routers R2 and R3.

C. Router R1forms eBGP sessions with routers R2 and R3.

D. The types of BGP sessions with routers R2 and R3 cannot be determined.

Click the exhibit.

Routers RR1 are RR2 are redundant route reflectors for clients R3 and R4. Which of the following is a valid configuration on router RR1?

A. Option A

B. Option B

C. Option C

D. Option D

Click the exhibit.

Router R2 is advertising prefix 192.168.1.0/27 with community "no-advertise" towards AS 65002. Which routers receive an update for that prefix?

A. Router R3 only.

B. Routers R3 and R4 only.

C. Routers R3, R4 and R5 only.

D. Router R2 does not advertise an update for the prefix.

Click the exhibit.

Which of the following statements best describes the BGP sessions within the given network?

A. The session between AS 65202 and AS 65206 is an iBGP session.

B. The session between AS 65204 and AS 65206 is an intra-confederation eBGP session.

C. A BGP session is required between AS 65202 and AS 65204.

D. The BGP sessions within the member ASs are known as inter-confederation BGP sessions.

Click the exhibit.

Assume all router-IDs are properly configured, and global IPv6 addresses are used to establish eBGP sessions. Which of the following configurations is required on router A so that router B can exchange traffic with router D?

A. Option A

B. Option B

C. Option C

D. Option D