Nokia Nokia Certifications 4A0-102 Questions & Answers

• Question 81:

  Click the exhibit.

  

  Router R6 is a route reflector for clients R1, R2 and R5 with local preferences 100, 200 and 500 respectively. Router R3 advertises prefix 192.168.1.0/27 to routers R1, R2 and R5 which are configured with advertise-external. Routers R4 and R6 are both configured with "add-paths ipv4 send 2 receive". Which routes to 192.168.0.1/27 is router R4 expected to have in its BGP routing table?

  A. The routes from routers R1, R2 and R5.

  B. The routes from routers R1and R2.

  C. The routes from routers R2 and R5.

  D. Two routes are chosen at random and advertised to router R4.

  Correct Answer: C

• Question 82:

  Click the exhibit.

  

  Assume all router-IDs are properly configured. Which of the following configurations is required on the Alcatel-Lucent 7750 SR router A to establish an IPv6 BGP session to router D?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

• Question 83:

  A BGP router has loopback interfaces 192.168.1.1/27 and 192.168.2.1/27 advertised into BGP using the following export policy. The "aggregate 192.168.0.0/16" command is executed.

  What is the effect of this configuration?

  

  A. A single route for 192.168.0.0/16 is advertised.

  B. BGP routes 192.168.1.0/27, 192.168.2.0/27, and 192.168.0.0/16 are advertised.

  C. BGP routes 192.168.1.0/27 and 192.168.2.0/27 are advertised, and 192.168.0.0/16 appears as a "Blackhole" route in the route table only.

  D. The given export policy is invalid.

  Correct Answer: C

• Question 84:

  When an Alcatel-Lucent 7750 SR receives a BGP route with an AS Path loop, what action is taken by default?

  A. The route is ignored.

  B. The route is flagged as invalid and placed in the LOC-RIB.

  C. The route is flagged as invalid and placed in the RIB-In.

  D. The route is flagged as invalid and placed in the RIB-Out.

  Correct Answer: C

• Question 85:

  Which of the following statements regarding route reflectors is TRUE?

  A. Route reflectors propagate BGP learned routes to their clients.

  B. Route reflectors require "n" iBGP sessions, where "n" is the number of BGP routers in the AS.

  C. Route reflectors disable iBGP split horizon for all iBGP peers in the AS.

  D. Route reflectors do not work in conjunction with confederations.

  Correct Answer: A

• Question 86:

  Which of the following describes BGP route processing on the Alcatel-Lucent 7750 SR?

  A. If no import policy is specified, all valid BGP routes are passed to the BGP route selection process.

  B. If no export policy is specified, all non-BGP routes are populated into RIB-Out.

  C. If no import policy is specified, all BGP routes are populated into the route table.

  D. If no import policy is specified, only valid BGP routes are populated into RIB-Out.

  Correct Answer: A

• Question 87:

  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.

  Correct Answer: D

• Question 88:

  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

  Correct Answer: D

• Question 89:

  An Alcatel-Lucent 7750 SR is configured with a policy to export directly-connected networks to BGP. Which of the following commands verifies that the export was successful?

  A. show router route-table

  B. show router bgp routes

  C. show router bgp routes hunt

  D. show router bgp neighbor received-routes

  Correct Answer: C

• Question 90:

  Which of the following statements regarding BGP Fast Reroute is FALSE?

  A. BGP Fast Reroute is triggered by IGP events.

  B. The backup path is pre-computed and installed in the FIB.

  C. BGP Fast Reroute is independent of number of affected prefixes.

  D. BGP Fast Reroute uses the optimal path to the destination.

  Correct Answer: D