Nokia SRC Certification 4A0-C01 Questions & Answers

• Question 41:

  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 42:

  Which of the following LDP message categories is UDP-based?

  A. Notification

  B. Session

  C. Discovery

  D. Advertisement

  Correct Answer: C

• Question 43:

  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 44:

  Initially, all links along the path R1-R2-R4-R6 have 400Mbps unreserved bandwidth and all links along the path R1-R3-R5-R6 have 600Mbps unreserved bandwidth. Shared Explicit reservation style is used and Make-Before-Break is enabled. Both fully loose LSPs have been signaled as shown. Later, the configured bandwidth for LSP-1 is changed to 500Mbps. Which of the following is TRUE?

  

  A. After a new path for LSP-1 is established on R1-R3-R5-R6, the old path is torn down.

  B. After the old path for LSP-1 is torn down, the new path is established on R1-R3-R5-R6.

  C. LSP-1 will stay on R1-R2-R4-R6 because there is enough bandwidth on the existing path.

  D. LSP-1 will be torn down after CSPF fails to find a new path.

  Correct Answer: C

• Question 45:

  The link between routers R4 and R6 is down before the LSP is signaled. CSPF is not enabled on the LSP. Which of the following conditions is TRUE?

  

  A. Router R1 sends a PATH message and router R4 sends back a PATH Error message.

  B. Router R1 does not send a PATH message because it detects an error.

  C. Router R1 sends a PATH message and router R4 sends back a PATH Tear message.

  D. Router R1 sends a PATH message and router R4 sends back a RESV Error message.

  Correct Answer: B

• Question 46:

  Which of the following is a benefit of traffic engineering?

  A. It avoids packet loss based on QoS classification.

  B. It optimizes resources by making use of redundant links.

  C. It automatically selects paths based on traffic congestion.

  D. It always selects the best path based on standard IGP path calculation.

  Correct Answer: B

• Question 47:

  Which of the following describes constraint-based routing?

  A. A mechanism that implements opaque LSAs.

  B. A mechanism that computes routes based on specified requirements.

  C. A mechanism that ensures the IGP best route is used.

  D. A mechanism that enables LDP signaling to use a route other than the IGP best route.

  Correct Answer: B

• Question 48:

  Which of the following is true when the implicit null is implemented?

  A. The penultimate router will pop the top label from the packets.

  B. The eLER will receive packets with a top label value of 3.

  C. The eLER will receive packets with a top label value of 0.

  D. The penultimate router will always receive unlabeled packets.

  Correct Answer: A

• Question 49:

  An LDP-over-RSVP tunnel is established between routers R1 and R6. There is a VPN service running between routers R1 and R6. Which of the following is TRUE?

  

  A. Router R3 swaps both the RSVP- LSP label and LDP transport label received with new labels.

  B. Router R3 swaps the VPN service label received with a new label.

  C. Router R3 uses the same RSVP- LSP label as the one received from router R2.

  D. Router R3 uses the same LDP transport label as the one received from router R2.

  Correct Answer: D

• Question 50:

  Which of the following statements regarding the IS-IS CSNP is FALSE?

  A. CSNPs are used to maintain consistency in the Link-State database.

  B. CSNPs are advertised before an adjacency is formed with another router.

  C. There are two types of CSNPs: Level 1 and Level 2.

  D. The CSNP lists the LSPs in the router's database

  Correct Answer: B