Nokia Nokia Certifications 4A0-104 Questions & Answers

• Question 131:

  How many service labels must be signaled to bring up a fully-meshed VPLS among five PE routers?

  A. 1

  B. 5

  C. 10

  D. 20

  Correct Answer: D

• Question 132:

  Click the exhibit.

  

  Which tool produced this output?

  A. ping

  B. Isp-ping

  C. traceroute

  D. Isp-trace

  Correct Answer: B

• Question 133:

  Click the exhibit.

  

  The operator at PE1 wants to analyze the traffic between PE2 and CE4. On a Nokia 7750 SR, which of the following is required as part of the configuration?

  A. PE2 needs a mirror source with the remote source specified.

  B. PE1 needs a mirror destination with the remote source specified.

  C. PE1 needs a mirror source with the remote source specified.

  D. PE1 and PE2 need a mirror source specified.

  Correct Answer: B

• Question 134:

  Click the exhibit.

  

  Both clips of output are from router R4. The show service command indicates that an SDP is down. What might be the cause?

  A. The mesh SDP on router R4 has been shutdown.

  B. The mesh SDP on 10.10.10.1 has been shutdown.

  C. The service MTU on 10.10.10.1 has been set to a different value.

  D. The IngLbl and EgrLbl that router R4 has for 10.10.10.1 are identical.

  Correct Answer: C

• Question 135:

  Which of the following best describes the flooding of traffic on a PE when unknown traffic is received on a SAP of a VPLS?

  A. Traffic is flooded to all SAPs in the service.

  B. Traffic is flooded to all SAPs and spoke SDPs in the service.

  C. Traffic is flooded to all SAPs and mesh SDPs in the service.

  D. Traffic is flooded to all SAPs, spoke SDPs, and mesh SDPs in the service.

  E. The traffic is not flooded.

  Correct Answer: D

• Question 136:

  Which of the following best describes how a MAC FDB is populated in a VPLS service?

  A. A VPLS service does not use a MAC FDB.

  B. The router reads the destination MAC address of frames passing through the service.

  C. The router reads the source MAC address of frames passing through the service.

  D. The router uses reverse ARP (RARP) to resolve the MAC addresses for unknown destinations.

  E. The router is programmed with MAC addresses by the network administrator.

  Correct Answer: C

• Question 137:

  Which of the following about an E-pipe terminating on a VPLS is FALSE?

  A. The VC-IDs used between the E-pipe and VPLS must match.

  B. The E-pipe must maintain a MAC FDB in order to connect to the VPLS.

  C. The service ID of the E-pipe can be different from that of the VPLS.

  D. The service MTU of the VPLS and E-pipe must match.

  Correct Answer: B

• Question 138:

  Consider a network that has four PE routers. If a customer wants a VPLS that has sites on only three of the PEs, how many mesh SDPs need to be configured for this service?

  A. 3

  B. 4

  C. 6

  D. 12

  Correct Answer: C

• Question 139:

  By default, what does a Nokia 7750 SR do to support VPLS services for different customers?

  A. Dedicates a separate port for each customer.

  B. Performs ARP look-ups for each service.

  C. Maintains a different IP routing table for each service.

  D. Maintains a different MAC Forwarding Database for each service.

  Correct Answer: D

• Question 140:

  Which of the following about SDPs is FALSE?

  A. Spoke SDPs prevent loops in a VPLS.

  B. Mesh SDPs and spoke SDPs can be used in the same VPLS.

  C. A spoke SDP does not require the routers at both ends to be directly connected.

  D. A mesh SDP is identical to a spoke SDP except for its flooding behavior.

  Correct Answer: A