Nokia Nokia Certifications 4A0-102 Questions & Answers

• Question 11:

  An autonomous system has 7 routers configured with BGP. How many iBGP sessions are required for a fully meshed configuration?

  A. 7

  B. 13

  C. 21

  D. 42

  Correct Answer: C

• Question 12:

  Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

  

  A. "client2" routes will be only tagged with communities 'East'' and "South".

  B. "client2" routes will be tagged with community "East".

  C. "client2" routes will only be tagged with community "South".

  D. "client2" routes will be rejected.

  Correct Answer: A

• Question 13:

  Which of the following regarding the connections between eBGP peers is TRUE?

  A. eBGP peers typically use system addresses for session establishment.

  B. eBGP peers are managed under a single administration.

  C. eBGP peers do not propagate updates learned via iBGP.

  D. eBGP peers are usually directly connected to each other.

  Correct Answer: D

• Question 14:

  Which of the following regarding BGP authentication on the Alcatel-Lucent 7750 SR is FALSE?

  A. Authentication is performed before establishing the BGP session.

  B. Authentication can only be configuredon the group or neighbor level.

  C. By default, MD5 authentication is disabled.

  D. Peer authentication may be optionally requested in an open message.

  Correct Answer: B

• Question 15:

  Based on the default settings for the Alcatel-Lucent 7750 SR, when a policy change is made and committed, what action is required by the user for the change to take effect?

  A. Execute a command to re-evaluate all routes in the Local-RIB against the configured export policies.

  B. Execute a command to re-evaluate all routes in the RIB-In against the configured import policies.

  C. Execute a command to reset the BGP session with the affected peer or peers.

  D. No further action is required.

  Correct Answer: D

• Question 16:

  Click the exhibit.

  

  Over which BGP session will router B learn the 10.1.1.0/24 prefix?

  A. The session between router A and router B.

  B. The session between router C and router B.

  C. The session between router D and router B.

  D. Router B will learn the prefix over all of the sessions, then it will choose the best route.

  Correct Answer: A

• Question 17:

  A router in AS 65100 receives three routes for 138.120.0.0/16. The first route has an AS Path of 65200 65400 65300 and a local preference of 150. The second route has an AS Path of 65200 65300 and a local preference of 100. The third route has an AS path of 65600 65300 and a local preference of 200. Which route will appear in the RIB-In?

  A. Only the first route will appear in the RIB-In.

  B. Only the second route will appear in the RIB-In.

  C. Only the third route will appear in the RIB-In.

  D. All routes will appear in the RIB-In.

  Correct Answer: D

• Question 18:

  Which of the following regarding the TTL of a BGP message is TRUE?

  A. TTL is a well-known mandatory BGP attribute.

  B. The default TTL value of an eBGP message is 1, and 64 for an iBGP message.

  C. The default TTL value of an iBGP message can be modified using the multihop command.

  D. The default TTL value of an eBGP message can be modified using the "ttl-security" command.

  Correct Answer: B

• Question 19:

  Click the exhibit.

  

  If router A originates a BGP route for prefix 192.168.0.1/27, what will the update contain when it reaches router B?

  A. AS Path of 65200, Next Hop of router A, Origin of IGP.

  B. AS Path of 65200, Next Hop of router A, Origin of incomplete.

  C. Null AS Path, Next Hop of router A, Origin of IGP.

  D. Null AS Path, Next Hop of router A, Origin of incomplete.

  Correct Answer: C

• Question 20:

  Which of the following commands would correctly configure the confederation AS number as 65200 with a member AS of 65202?

  A. config>router- confederation 65200 members 65202

  B. config>router>bgp= confederation 65200 members 65202

  C. config>router= confederation 65202 members 65200

  D. config>router>bgp= confederation 65202 members 65200

  Correct Answer: A