Nokia Nokia Certifications 4A0-102 Questions & Answers

• Question 111:

  Which of the following statements regarding BGP shortcuts is FALSE?

  A. MPLS tunnels are used to carry transit traffic across the network.

  B. A full mesh of iBGP peering sessions is not required,

  C. Edge and transit routers need to be configured with BGP.

  D. The transit routers need to support LDP or RSVP-TE LSPs.

  Correct Answer: C

• Question 112:

  Which of the following statements regarding BGP control plane convergence is FALSE?

  A. Core and edge node failure recovery depends on IGP convergence.

  B. Edge neighbor failure is detected by the eBGP session timeout.

  C. BGP control plane convergence is independent of number of affected prefixes.

  D. Upon BGP control plane convergence, an optimal path is installed in the FIB.

  Correct Answer: C

• Question 113:

  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

  Correct Answer: C

• Question 114:

  Click the exhibit.

  

  Routers C and E are route reflectors. When the update for prefix 192.168.2.0/24 is received at router F, what will be the Originator_ID attribute?

  A. The router ID of router A.

  B. The router ID of router B.

  C. The router ID of router C.

  D. It will not be set.

  Correct Answer: B

• Question 115:

  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.

  Correct Answer: A

• Question 116:

  Which of the following regarding "well-known discretionary'' BGP attributes is TRUE?

  A. They must be recognized by all peers and included in all BGP updates.

  B. They are discarded if not recognized by the recipient.

  C. They must be recognized by all peers and optionally included in BGP updates.

  D. The receiving router sends a notification if a well-known discretionary attribute is not present in an update.

  Correct Answer: C

• Question 117:

  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 R5?

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

• Question 118:

  BGP is configured on two peers, routers A and B. Router A is configured with a Hold Time timer of 60 seconds and a Keepalive timer of 25 seconds. Router B is configured with a Hold Time timer of 90 seconds and a Keepalive timer of 70 seconds.

  What will the active Keepalive timer be on router B?

  A. 70 seconds

  B. 25 seconds

  C. 20 seconds

  D. 30 seconds

  Correct Answer: C

• Question 119:

  Click the exhibit.

  

  Router R2 receives a route to 192.168.1.0/27 from router R4, and sets the local preference to 110. Router R1 receives a route to 192.168.1.0/27 from router R3, and sets the local preference to 80. Both ASs have a full iBGP mesh.

  What path does traffic destined to 192.168.1.0/27 take from router R1?

  A. R1-R3-R8

  B. R1-R2-R4-R8

  C. R1-R3-R4-R8

  D. R1-R2-R4-R3-R8

  Correct Answer: B

• Question 120:

  Which of the following regarding BGP Path Identifier is FALSE?

  A. Path-ID is a four-octet identifier pre-pended to the NLRI field of a BGP update.

  B. Path-ID is an optional transitive attribute used to advertise multiple paths.

  C. Path-ID uniquely identifies each path advertised to a neighbor.

  D. A BGP speaker that re-advertises a route must generate its own Path-ID.

  Correct Answer: B