Nokia Nokia Certifications 4A0-103 Questions & Answers

• Question 61:

  Which of the following is a characteristic of LDP Hello messages?

  A. They are multicast to the All Hosts address.

  B. They are broadcast to the subnet broadcast address.

  C. They are multicast to the All Routers address.

  D. They are broadcast or multicast, depending on the physical media.

  Correct Answer: C

• Question 62:

  Which of the following regarding MPLS label value assignment is FALSE?

  A. Label values may be dynamically assigned by LDP.

  B. Label values may be dynamically assigned by RSVP-TE.

  C. Label values may be reserved for special uses.

  D. Label values may be dynamically assigned by IGP.

  Correct Answer: D

• Question 63:

  Which of the following best describes downstream on demand label distribution?

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

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

  C. An LSR distributes a label mapping for a FEC when it has been requested to do so.

  D. An LSR propagates a label mapping downstream for a FEC. only if it has a label mapping for the FEC's next-hop.

  Correct Answer: C

• Question 64:

  Which MPLS label mode propagates a label mapping only for the FEC for which a router has a label mapping for the FEC's next-hop?

  A. Independent control mode

  B. Ordered control mode

  C. Liberal label retention mode

  D. Conservative label retention mode

  E. Downstream on demand label distribution mode

  Correct Answer: B

• Question 65:

  If an Alcatel-Lucent 7750 SR is an iLER operating in pipe mode, which of the following regarding the TC field (EXP bits) is TRUE?

  A. The TC field is set based on the value of the DSCP field inside the customer packet.

  B. The TC field is set to a specific value via explicit administrative configuration.

  C. The TC field is set to a system generated random number.

  D. The TC field is set by the eLER.

  Correct Answer: B

• Question 66:

  Which of the following is TRUE when the explicit null is implemented?

  A. The penultimate router will forward packets to the eLER, based on the IP header.

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

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

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

  Correct Answer: B

• Question 67:

  Which of the following regarding per-platform label space is TRUE?

  A. A separate label is used for each interface on which the FEC is advertised.

  B. A single label is assigned to a FEC for all interfaces on the same router,

  C. It is typically used when the device has ATM or Frame Relay interfaces.

  D. It uses more label resources than a per-interface label space.

  Correct Answer: B

• Question 68:

  Which of the following is NOT a characteristic of MPLS?

  A. It provides the ability to establish connection oriented paths over a connectionless IP network.

  B. It provides a mechanism to engineer network traffic patterns independently of IP routing tables.

  C. It will work over most physical layer protocols.

  D. It can use GRE tunnels to transport data from many different protocols over an IP network.

  Correct Answer: D

• Question 69:

  Click on the exhibit.

  

  An LSP traverses the path R1-R2-R3. With one-to-one fast reroute enabled, which router becomes a DMP for the detour tunnels?

  A. Router R1

  B. Router R2

  C. Router R3

  D. Router R4

  E. Router R5

  Correct Answer: E

• Question 70:

  Click on the exhibit.

  

  An LSP's primary path takes R1-R3-R5-R6. Its fully loose secondary path is configured for SRLG. All links are of equal cost. Which path will the secondary path take?

  A. The secondary path will take R1-R3-R2-R4-R6.

  B. The secondary path will take R1-R2-R4-R6.

  C. The secondary path will take R1-R2-R3-R5-R6.

  D. The secondary path will take R1-R3-R2-R4-R5-R6.

  Correct Answer: A