4A0-102 Online Practice Questions and Answers

Which of the following about default BGP behavior is FALSE?

A. Next Hop is modified in iBGP updates.

B. Origin Code is NOT modified in eBGP updates.

C. AS Path is modified in eBGP updates.

D. Local Preference is NOT modified in iBGP updates.

Click the exhibit.

Router R2 receives a route to 192.168.4.0/29 from router R4 and sets the local preference to 110.

Router R1 receives the route to 192.168.4.0/29 from router R3, and sets the local preference to 80. There

is a full iBGP mesh in AS 65540, but router R5 only has a physical connection to router R1.

Which path does traffic destined to 192.168.4.0/29 take from router R5?

A. R5-R2-R4-R8

B. R5-R1-R3-R4-R8

C. R5-R1-R2-R4-R8

D. R5-R1-R3-R7-R8

Click the exhibit.

Routers RR1 and RR2 are route reflectors with the same cluster-ID. How many updates for prefix 192.168.1.0/27 are received at router RR1?

A. 1

B. 2

C. 3

D. 4

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 R2?

A. Option A

B. Option B

C. Option C

D. Option D

Which of the following is TRUE if the local state of BGP is OpenConfirm?

A. The local system has received a Keepalive message and is ready to exchange updates.

B. The local system is exchanging Update messages with its neighbor.

C. The local system has sent a Keepalive message to its neighbor and is waiting to receive one back.

D. The local system has sent an Open message to its neighbor and is waiting to receive one back.

An Alcatel-Lucent 7750 SR receives a route from an eBGP peer with a MED value of 500.

What MED value is sent to iBGP peers?

A. 100

B. The IGP cost

C. 500

D. None

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.

Assume all router-IDs are properly configured, and link-local IPv6 addresses are used to establish the eBGP sessions. Which of the following is the MINIMAL configuration 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

The user of an Alcatel-Lucent 7750 SR wants to see the effect of changing an import policy immediately. What is the best command to force re-evaluation of the import policy with minimal impact?

A. Configure router bgp shutdown

B. Clear router bgp neighbor soft

C. Clear router bgp neighbor soft-inbound

D. Clear router bgp protocol

What is the result of configuring the following policy statement as a BGP import policy on the Alcatel-Lucent 7750 SR?

A. All BGP routes are accepted.

B. All routes matching prefix lists "List-1" and "List-2" are rejected.

C. BGP routes matching prefix lists "List-1" or "List-2" are rejected.

D. BGP routes matching prefix lists "List-1" and "List-2" are rejected.

Click the exhibit.

Routers RR1 and RR2are route reflectors with clients R1x and R2x, respectively. Routers RR1 and RR2 are non-clients of each other, and router R1 is a non-client of both.

Which of the following regarding BGP sessions in AS 65540 is TRUE?

A. Router R1must have at least one BGP session to each of routers R1x and R2x.

B. Routers R1, RR1 and RR2 must be fully meshed.

C. Routers R1x and R2x must have at least one BGP session between them.

D. Routers R1x as well as routers R2x must be fully meshed.

Click on the exhibit.

AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. AS 65541 is advertising prefix 192.168.1.0/27 into BGP. Which routers have the BGP update for the advertised prefix in their BGP table?

A. Routers R1, R2, R3, R4 and R5.

B. Routers R1and R4 only.

C. Routers R1, R2, R3 and R4 only.

D. Routers R1, R4 and R5 only.

Click the exhibit.

Router R6 is a route reflector with clients R1, R2, R4 and R5. Router R4 receives three routes from router R6 and is configured with ECMP 3. Given the following BGP configuration on routerR4, how many primary and backup paths will be present in router R4's BGP routing table?

A. Three primary paths,

B. Two primary paths and one backup path.

C. One primary path and two backup paths.

D. One primary path and one backup path.

Click the exhibit.

Router R6 is a route reflector with clients R1, R2 and R5. Router R3 advertises the prefix 192.168.1.0/27 to routers R1, R2 and R5. How many routes for prefix 192.168.1.0/27 will router R6 receive?

A. 1

B. 2

C. 3

D. None

Click the exhibit.

Assuming that none of the routers within AS 65200 is configured with next-hop-self", what will the BGP update for the 192.168.0.1/27 prefix contain when it arrives at router B?

A. AS Path of 65200 65100, Next Hop of router A.

B. AS Path of 65200 65100, Next Hop of router E.

C. AS Path of 65100, Next Hop of router E.

D. AS Path of 65100, Next Hop of router A.