Nokia Nokia Certifications 4A0-103 Questions & Answers

• Question 91:

  Click on the exhibit.

  

  This policy is applied as an LDP export policy. In addition to the FECs learned from its neighbors, which FECs will appear in this router's LIB?

  A. All FECs with a prefix of 192.168.1.0/30.

  B. Local FECs with a prefix of 192.168.1.0/30.

  C. All FECs excluding 192.168.1.0/30.

  D. Local FECs excluding 192.168.1.0/30.

  Correct Answer: D

• Question 92:

  Which of the following LDP settings can be changed with CLI?

  A. Label space mode

  B. Label retention

  C. Control mode

  D. Keepalive factor

  Correct Answer: D

• Question 93:

  Click on the exhibit.

  

  Router R2 advertises the aggregate prefix 10.10.10.0/24 into Area 1. Why would LDP aggregate- prefix-match be enabled on router R3?

  A. To reduce the number of LDP sessions

  B. To reduce the number of LIB and LFIB entries

  C. To bypass the LDP exact prefix match rule

  D. To export summarized routes from OSPF to LDP

  Correct Answer: C

• Question 94:

  What MPLS function should be performed by a router that receives a data packet with an MPLS label value of 0?

  A. Push an additional label onto the label stack.

  B. Pop the label.

  C. Swap the label.

  D. Pop the label and push an additional label onto the label stack.

  Correct Answer: B

• Question 95:

  Which mode does the following statement describe? An LSR will advertise a label mapping immediately, without waiting for a label mapping from the FEC's next-hop.

  A. Liberal label retention mode

  B. Conservative label retention mode

  C. Ordered control mode

  D. Independent control mode

  Correct Answer: D

• Question 96:

  Which of the following about T-LDP on the Alcatel-Lucent 7750 SR is FALSE?

  A. T-LDP is used to provide an end-to-end session between two PE routers.

  B. T-LDP is used to signal service labels for Layer 2 services.

  C. T-LDP is used to establish transport tunnels for Layer 2 services.

  D. T-LDP is used in LDP over RSVP solution.

  Correct Answer: C

• Question 97:

  Which of the following best describes downstream unsolicited label distribution?

  A. An LSR may answer requests for label mappings immediately, without waiting for a label mapping from the next-hop.

  B. An LSR may advertise label mappings to all peers for which it might be a next-hop for a given FEC.

  C. An LSR propagates a label mapping downstream for a FEC, only if it has a label mapping for the FEC next-hop.

  D. An LSR will only distribute a label for a FEC when it has been requested to do so.

  Correct Answer: B

• Question 98:

  Which of the following is a function of the control plane in an MPLS router?

  A. Label swapping

  B. Pushing a label on an unlabeled packet

  C. Label allocation

  D. Routing lookups

  Correct Answer: C

• Question 99:

  Which of the following regarding the MPLS SWAP label operation is TRUE?

  A. The inner label will be exchanged with the MPLS outer label.

  B. The inner label will be exchanged for a new label.

  C. The outer label will be exchanged for a new label.

  D. All labels will be exchanged for one new label.

  E. All labels will be exchanged for an equal number of new labels.

  Correct Answer: C

• Question 100:

  Click on the exhibit.

  

  A fully loose LSP "toR6" 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-R8R4-R6. Which of the following about this CSPF-enabled LSP on an Alcatel-Lucent 7750 SR is TRUE?

  A. The LSP will stay on the current path indefinitely unless another failure occurs.

  B. The LSP will stay on the current path until the resignal timer expires.

  C. The LSP will switchover to R1-R2-R3-R5-R6 after the resignal timer expires.

  D. The LSP will switchover to R1-R3-R5-R6 after the retry timer expires.

  Correct Answer: D