Nokia Nokia Certifications 4A0-106 Questions & Answers

• Question 191:

  Which method does the Alcatel-Lucent 7750 SR use for the allocation of VPRN labels?

  A. One label per route

  B. One label per next-hop

  C. One label per VRF

  D. One label per prefix

  E. One label per tunnel

  Correct Answer: C

• Question 192:

  In a VPRN, which of the following are supported as PE-CE routing methods on the Alcatel-Lucent 7750 SR? (Choose four).

  A. Static

  B. RIP

  C. OSPF

  D. IS-IS

  E. MP-BGP

  F. BGP

  Correct Answer: ABCF

• Question 193:

  Which of the following statements is true regarding the Route Distinguisher? (Choose three)

  A. It is an 8 byte value containing 3 fields

  B. The Route Distinguisher must have the same value as the Route Target.

  C. The Administrator field contains either an AS number or an IP number

  D. To ensure uniqueness, Route Distinguishers are assigned by the IANA.

  E. The Route Distinguisher is not used if the customer addresses do not overlap

  F. The Assigned Number field must contain a public IP address

  Correct Answer: ABC

• Question 194:

  Which protocol is used to exchange customer VPRN routes between PE devices?

  A. OSPF

  B. ISIS

  C. MP-BGP

  D. BGP

  E. Targeted LDP

  Correct Answer: C

• Question 195:

  In a VPRN, how does the service provider ensure that customer addresses are unique when multiple customers use the same address space?

  A. It is the customer responsibility to ensure their address space is unique

  B. The Route Distinguisher ensures that addresses are unique between customers.

  C. The Route Target ensures that addresses are unique between customers

  D. The provider will advise the customers to change their addresses

  E. The provider will use NAT to ensure that addresses are unique between customers

  Correct Answer: B

• Question 196:

  Which of the following statements is true? Choose the best answer.

  A. A P router may forward customer packets to their destination without the presence of a route to that destination

  B. The ingress PE router may forward customer packets to their destination without the presence of a route to that destination

  C. The egress PE router may forward customer packets to their destination without the presence of a route to that destination

  D. Any provider core router (P or PE) may forward customer packets to their destination without the presence of a route to that destination

  Correct Answer: A

• Question 197:

  What operation is performed by a P device on the label signaled by MP-BGP when it receives a labeled packet for a VPRN service?

  A. It will label switch the packet based on this label

  B. It will decrement the TTL and label switch the packet based on this label

  C. It will SWAP the label for a new label and then label switch the packet

  D. The P router does not perform any operation on this label

  Correct Answer: D

• Question 198:

  Which of the following devices would typically have VRF instances?

  A. Any CE device

  B. Any PE device

  C. Any P device

  D. Any router in the service provider core

  E. Any customer router

  Correct Answer: B

• Question 199:

  Complete the following statement. In a VPRN, the inner label is used to _______________.

  A. Identify the customer network on the egress PE

  B. Establish the LSPs between PE devices

  C. Identify the egress PE in the MPLS domain

  D. Identify the customer network on the ingress PE

  Correct Answer: A

• Question 200:

  Complete the following statement. In a VPRN, the label signaled by RSVP-TE is used to ______________.

  A. Identify the egress PE in the MPLS domain

  B. Signal the egress VPRN ID

  C. Identify the ingress PE in the MPLS domain

  D. Transport route updates between PEs

  Correct Answer: A