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Alcatel-Lucent 4A0-102 Exam
4A0-102 Alcatel-Lucent Border Gateway Protocol (Page 4 )

Updated On: 1-Feb-2026
Page 4 of 32
PDF with 152 Questions

Click the exhibit.


AS 65100 is advertising 192.168.1.0/27 into BGP. Which of the following AS Paths would the prefix 192.168.1.0/27 contain when viewed on router R8?

  1. 65200 (65206 65202) 65100
  2. (65206 65202)65100
  3. 65250 (65206 65202) 65100
  4. 65200 65100

Answer(s): D



A confederated AS is comprised of three members. One member is comprised of 4 routers, while the other two members are comprised of 3 routers each. Assuming member ASs are fully meshed and use full mesh iBGP, what is the required number of BGP sessions within the confederation?

  1. 12
  2. 13
  3. 14
  4. 15

Answer(s): D



Two Alcatel-Lucent 7750 SRs are established BGP peers with the following add-paths configuration:

R1: configure router bgp add-paths ipv4 send 4 receive
R2: configure router bgp add-paths ipv4 send 2

If router R1 advertises three routes for a given prefix X, how many routes is router R2 expected to have for prefix X?

  1. None
  2. 2
  3. 3
  4. 4

Answer(s): C



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

  1. BGP Fast Reroute is triggered by IGP events.
  2. The backup path is pre-computed and installed in the FI
  3. BGP Fast Reroute is independent of number of affected prefixes.
  4. BGP Fast Reroute uses the optimal path to the destination.

Answer(s): D



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?

  1. Three primary paths,
  2. Two primary paths and one backup path.
  3. One primary path and two backup paths.
  4. One primary path and one backup path.

Answer(s): B



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