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

• Question 41:

  Click on the exhibit.

  

  An LDP tunnel is established on router R1 towards router R6. The link between routers R2 and R4 goes down. What will happen to the MPLS data traffic to router R6 IMMEDIATELY after the link goes down?

  A. MPLS data traffic will be discarded until the IGP finds a new next-hop to router R3.

  B. MPLS data traffic will be discarded unless the LDP tunnel has a standby secondary path.

  C. MPLS data traffic will not be discarded because router R1 received labels from both next- hops, routers R2 and R3.

  D. MPLS data traffic will not be discarded because of fast reroute capability on router R2.

  Correct Answer: B

• Question 42:

  Click on the exhibit.

  

  A fully loose LSP "toR6" is configured. All links have the same cost and all routers are Alcatel- Lucent 7750 SRs. The LSP currently traverses the path R1-R2-R7-R8-R4-R6 and the resignal timer is enabled. Which of the following about this LSP is FALSE?

  A. The LSP will switchover to another path if a failure occurs.

  B. The LSP will switchover to a better path as soon as it is available.

  C. CSPF must be enabled for this LSP to attempt to find a better path.

  D. The LSP will switchover to a better path in a MBB fashion.

  Correct Answer: B

• Question 43:

  Which of the following about Fast Reroute link protection tunnels is FALSE?

  A. Link protection tunnels are established if a router is unable to establish node protection tunnels.

  B. Link protection tunnels are only requested for a primary LSP path.

  C. Link protection tunnels can be created for both one-to-one or facility Fast Reroute.

  D. Link protection tunnels detour around a failed next downstream router.

  Correct Answer: D

• Question 44:

  An LSP is configured with one-to-one FRR and node protection on a Alcatel-Lucent 7750 SR. Which of the following is FALSE?

  A. Each PLR signals a protection tunnel that avoids the downstream node.

  B. A single protection tunnel can protect all LSPs that go through the same hop.

  C. A link protection tunnel is signaled if a node protection tunnel cannot be established.

  D. Protection tunnels used in this LSP are also detour tunnels.

  Correct Answer: B

• Question 45:

  Click on the exhibit.

  

  If the primary path fails, which backup LSP path will the head-end router pick first?

  A. The Standby with the highest next-hop IP.

  B. The first Standby in the list.

  C. The Standby with the longest uptime.

  D. The Standby with the lowest next-hop IP.

  Correct Answer: C

• Question 46:

  Click on the exhibit.

  

  The path of a fast reroute protected LSP is R1-R2-R3. Which of the following about the protected LSP path is TRUE?

  A. All routers along the path, R1, R2, and R3 can be PLRs.

  B. If the R1-R2 link fails, router R4 becomes an MP.

  C. If the R2-R3 link fails, router R3 becomes a PLR.

  D. Router R1 is the LSP head-end and can be a PLR.

  Correct Answer: D

• Question 47:

  Click on the exhibit.

  

  Two LSPs traverse the path R1-R2-R3. Both LSPs are configured with facility fast reroute and link protection. When router R1 is the PLR, which router becomes the Merge Point (MP) for this LSP?

  A. Router R1

  B. Router R2

  C. Router R3

  D. Router R4

  E. Router R5

  Correct Answer: B

• Question 48:

  Initially, all ports on an Alcatel-Lucent 7750 SR have 10Gbps bandwidth. RSVP configuration limits reservable bandwidth to 30 percent on all interfaces. An LSP is signaled reserving 1 Gbps bandwidth. How much unreserved bandwidth is left on the interface?

  A. 10 Gbps

  B. 7 Gbps

  C. 3 Gbps

  D. 2 Gbps

  Correct Answer: D

• Question 49:

  How does a DMP inform the downstream routers that it has merged detour tunnels?

  A. The DMP sends the DMP_Object in each detour's PATH messages.

  B. The DMP summarizes PATH messages, giving each detour its own MSGJD.

  C. The DMP identifies itself as the previous hop in each detour's PATH message.

  D. The DMP sends a single PATH message containing the merged DETOUR_Objects.

  Correct Answer: D

• Question 50:

  Which of the following about MPLS shortcuts for IGP on an Alcatel-Lucent 7750 SR is FALSE?

  A. An IGP route takes priority over a transport tunnel.

  B. Both LDP and RSVP-TE based tunnels can be used.

  C. MPLS tunnels can be used to resolve the prefixes learned via IGP.

  D. Multiple MPLS tunnels can be installed in the FIB.

  Correct Answer: A