Alcatel-Lucent Alcatel-Lucent Certifications 4A0-103 Questions & Answers

• Question 21:

  Which of the following defines an FEC in traditional IP?

  A. A group of packets that will be forwarded by the router in the same manner, over the same path.

  B. A group of packets that arrive at the router on the same interface,

  C. A group of packets that leave the router on the same interface.

  D. A group of packets that arrive at the router on the same interface, from the same source.

  Correct Answer: A

• Question 22:

  Which of the following devices inspects the MPLS header in the received packet, and exchanges it for a new MPLS header?

  A. iLER

  B. LER

  C. LSR

  D. PE

  E. eLER

  Correct Answer: C

• Question 23:

  Click on the exhibit.

  

  An LSP traverses R1-R2-R4-R6 and one-to-one fast reroute with link protection is enabled. All links have the same cost. Which of the following about DMP and MP is TRUE?

  A. R3 and R5 become DMPs; R6 becomes MP.

  B. R3 and R5 become DMPs; R4 becomes MP.

  C. R3, R5, and R6 become DMPs; R4 becomes MP.

  D. R1, R3, and R5 becomes DMPs; R4 and R6 become MPs.

  Correct Answer: A

• Question 24:

  Click on the exhibit.

  

  An LDP tunnel is established on R1-R2-R4-R6 because the link between routers R3 and R6 is down. With the LDP-IGP Sync feature enabled, what happens immediately after the link is restored?

  A. A new LDP session is established on R1-R3-R6 as soon as the FIB is updated.

  B. The LDP session remains unchanged until the existing path R1-R2-R4-R6 goes down.

  C. A new LDP session is established on R1-R3-R6 as soon as router R1 receives a new label for router R6.

  D. The LDP session remains unchanged until router R3 stops advertising the maximum metric for the link to router R6.

  Correct Answer: D

• Question 25:

  Facility fast reroute with node protection is enabled for an LSP, which of the following is FALSE?

  A. Each PLR signals a bypass tunnel that avoids the next-hop downstream router.

  B. When a failure occurs, the PLR pushs an additional label onto the label stack.

  C. No bypass tunnel is established if the PLR cannot provide node protection.

  D. The head-end router sets the local protection desired flag in the session attribute object.

  Correct Answer: C

• Question 26:

  Click on the exhibit.

  

  If the primary path goes down, which secondary LSP path will the head-end router select first?

  A. Secondary_Path-1 B. Secondary_Path-2

  C. Secondary_Path-3

  D. Secondary_Path-4

  Correct Answer: C

• Question 27:

  Click on the exhibit.

  

  An LSP path is established on router R1 toward router R6. If there is a problem on router R4, but the link between R2 and R4 remains up, which of the following will affect the failure detection time?

  A. The time router R2 takes to receive a PATH Error message from router R4.

  B. The time router R2 takes to find out a number of RSVP Hello messages have been missed.

  C. The time router R2 takes to send a PATH Tear message to the head-end router.

  D. The time router R2 takes to receive a PATH message from router R4 after a PATH refresh interval.

  Correct Answer: B

• Question 28:

  Which of the following is NOT required when configuring an LSP with an admin group constraint on an Alcatel-Lucent 7750 SR?

  A. Enable traffic engineering on all routers along the LSP path.

  B. Enable CSPF on the head-end router.

  C. Configure a path definition on all routers along the LSP path.

  D. Enable MPLS and RSVP on all routers along the LSP path.

  Correct Answer: C

• Question 29:

  To enable the LDP-over-RSVP feature, which of the following configurations is NOT required on an Alcatel-Lucent 7750 SR?

  A. Enable the Idp-over-rsvp feature on all PEs and ABRs along the LSP tunnel.

  B. Configure Link-LDP sessions between each PE-ABR and ABR-ABR pair.

  C. Configure RSVP-TE LSPs in each area between each PE-ABR and ABR-ABR pair.

  D. Configure T-LDP sessions with the tunneling option.

  Correct Answer: B

• Question 30:

  Which of the following describes 6PE?

  A. P routers run IPv4 only. PE routers run IPv4 only and exchange IPv6 routes using MP-BGP.

  B. P routers run IPv4 only. PE routers run both IPv4 and IPv6 and exchange IPv6 routes using MP-BGP.

  C. P routers run IPv6 only. PE routers run both IPv4 and IPv6 and exchange IPv4 routes using MP-BGP.

  D. P routers run IPv6 only. PE routers run IPv6 only and exchange IPv4 routes using MP-BGP.

  Correct Answer: B