Nokia Nokia Certifications 4A0-103 Questions & Answers

• Question 71:

  Click on the exhibit.

  

  An LSP traverses R1-R2-R3-R6 and one-to-one fast reroute is enabled. If the protected LSP transports two labels, and router R2 has failed, how many labels will be on the detour path?

  A. 1

  B. 2

  C. 3

  D. 4

  Correct Answer: B

• Question 72:

  Which of the following about the use of RRO in fast reroute is FALSE?

  A. RRO is used to report the protection tunnel status to the head-end router.

  B. RRO contains the MP information that is required by a PLR for facility protection.

  C. RRO contains the label information that is expected by an MP for facility protection.

  D. RRO is used to inform downstream routers about the protection type requested.

  Correct Answer: D

• Question 73:

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

  A. Node protection tunnels detour around a failed next downstream router.

  B. Node protection tunnels can only be requested for a primary LSP path.

  C. Node protection tunnels are only used by one-to-one Fast Reroute.

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

  Correct Answer: C

• Question 74:

  Click on the exhibit.

  

  LSP " to R8-5 " requests fast reroute protection. What could be done to remove the Failure Code shown?

  A. The LSP must be enabled with CSPF on the head-end router.

  B. Fast reroute must be enabled on the downstream routers.

  C. A mixture of strict and loose hops must be defined in the primary path.

  D. CSPF and fast reroute must be enabled on all downstream routers.

  Correct Answer: A

• Question 75:

  Click on the exhibit.

  

  An LSP path is established on router R1 toward router R6. If the link between routers R4 and R6 goes down, which of the following is the quickest way for service recovery?

  A. Router R1 updates its FIB after a new SPF calculation.

  B. Router R1 switches to a secondary path.

  C. Router R4 switches to a FRR path.

  D. Router R4 switches to a standby secondary path.

  Correct Answer: C

• Question 76:

  Which of the following about an LSP protected with facility FRR is TRUE?

  A. The LSP can use protection tunnels used by other LSPs.

  B. The LSP can use facility and one-to-one FRR simultaneously.

  C. The LSP is limited to link protection.

  D. A detour protection tunnel is created for this LSP.

  Correct Answer: A

• Question 77:

  Click on the exhibit.

  

  A fully loose LSP MtoR6" is enabled with FRR protection. All links have the same cost. After the link between R2 and R4 goes down, FRR protection repairs the LSP and traffic traverses on R1-R2-R7-R8-R4R6. By default, which of the following about this LSP on an Alcatel-Lucent 7750 SR is FALSE?

  A. The LSP will switch to R1-R3-R5-R6 after the resignal timer expires.

  B. The old primary path and its detours are torn down after the new primary path is established.

  C. CSPF must be enabled to find a more optimal path.

  D. The traffic is switched to R1-R3-R5-R6 in an MBB fashion.

  Correct Answer: A

• Question 78:

  Click on the exhibit.

  

  All links have 1 Gbps unreserved bandwidth initially and all LSPs have the least-fill feature enabled. After

  the two LSPs have been signaled as shown, two additional LSPs are configured.

  LSP-3 is signaled first with 50Mbps reserved. LSP-4 is signaled after with 400Mbps reserved.

  Which paths will CSPF choose for LSP-3 and LSP-4?

  A. Both LSP-3 and LSP-4 take R1-R2-R4-R6.

  B. Both LSP-3 and LSP-4 take R1-R3-R5-R6.

  C. LSP-3 takes R1-R3-R5-R6 and LSP-4 takes R1-R2-R4-R6.

  D. LSP-3 takes R1-R2-R4-R6 and LSP-4 takes R1-R3-R5-R6.

  E. CSPF randomly chooses one of the equal cost paths for the two LSPs.

  Correct Answer: B

• Question 79:

  Click on the exhibit.

  

  Which of the following CANNOT be used to ensure the LSP toR6" will follow the path R1-R2- R4-R6?

  A. Admin groups

  B. Hop-limit

  C. Strict hops

  D. TE-Metric

  Correct Answer: B

• Question 80:

  An Alcatel-Lucent 7750 SR has its TE update threshold enabled with the up threshold set to 40%. The maximum reservable bandwidth on the link is 200M and 30M have already been reserved. When will a TE update be sent on this link?

  A. When the reserved bandwidth goes above 80M.

  B. When the reserved bandwidth goes above 40M.

  C. When an additional 80M bandwidth is reserved.

  D. When an additional 40M bandwidth is reserved.

  Correct Answer: A