Nokia Nokia Certifications 4A0-103 Questions & Answers

• Question 161:

  Which of the following is a primary cause of IP hyper-aggregation?

  A. IP routing protocols do not always select the best route to a destination.

  B. IP routing protocols always select multiple routes to a destination.

  C. IP routing protocols do not make use of all available network attributes to select a path

  D. Improper network design results in limited network path redundancy.

  Correct Answer: C

• Question 162:

  Which of the following conditions must a router meet for an LSP path's RSVP session to exist? Choose two answers

  A. The router must build the Path State Block (PSB).

  B. The router must build the Reservation State Block (RSB).

  C. The router must build the Session State Block (SSB)

  D. The router must send the second RESV refresh message.

  E. The router must receive the second PATH refresh message.

  Correct Answer: AB

• Question 163:

  Which one of the following statements regarding RSVP LSP configuration is true?

  A. LSPs must always terminate on a system ID.

  B. MPLS and RSVP must be enabled on all routers.

  C. Interfaces must be individually created in RSVP.

  D. Path definitions must include at least one hop entry.

  Correct Answer: B

• Question 164:

  Which of the following configurations allow a router to periodically attempt to move LSP traffic to a better path, if the head end can find one?

  A. configure router mpls retry-timer 30

  B. configure router mpls resignal-timer 30

  C. configure router mpls retry-attempts 30

  D. configure router mpls global-revertive 30

  Correct Answer: B

• Question 165:

  Click on the exhibit button below. Assume the following:

  

  -Each router's OSPF interfaces are in the areas shown.

  -Bidirectional LDP-over-RSVP tunnels extend from routers R1 to R3 and back over the path R1-R4-R5R3.

  -You enable fast reroute facility bypass on the R5-R3 RSVP LSP.

  -Router R5 acts as a PLR, protecting the R5-R3 link by building a bypass tunnel through router R2.

  You build a layer 2 VPN on routers R1 and R3, using the LDP-over-RSVP tunnels. What MPLS configuration step must you complete on router R2 for it to protect the end-to-end service?

  A. Enable LDP on the R2-R5 interface.

  B. Configure T-LDP sessions between routers R2 and R5 and R3.

  C. Configure LDP-over-RSVP support on router R2.

  D. Enable MPLS and RSVP on the router R2 network interfaces.

  E. Enable LDP on the R2-R5 and R2-R3 interfaces.

  Correct Answer: D

• Question 166:

  Click on the exhibit button below.

  

  Under which condition might the peer LDP ID 10.10.10.2:0 entry show state "Nonexistent"?

  A. When the interface to the peer router is down.

  B. When router R1 has no route to the peer address 10.10.10.2.

  C. When the adjacency between the two routers fails.

  D. When the targeted session is not yet configured.

  Correct Answer: B

• Question 167:

  Click on the exhibit button below. Assume the following: -The protected path is R1-R2-R3-R6.

  

  -Fast reroute one-to-one protection is enabled.

  If the original LSP already has two labels, and router R2 has failed, how many labels will there be in packets on the detour path?

  A. 1

  B. 2

  C. 3

  D. 4

  Correct Answer: B

• Question 168:

  Click on the exhibit button below.

  

  Consider the output shown; what table is displayed?

  A. RIB

  B. FIB

  C. LIB

  D. LFIB

  Correct Answer: D

• Question 169:

  Which of the following LDP messages are used in the successful establishment of LDP sessions? Choose three answers

  A. Label request message

  B. Notification message

  C. Address message

  D. Keepalive message

  E. Initialization message

  F. Hello message

  Correct Answer: DEF

• Question 170:

  Which of the following timers can be adjusted to reduce the time a router waits between attempts to reestablish an LSP after it has failed?

  A. Isp retry-timer

  B. Isp retry-limit

  C. mpls resignal-timer

  D. rsvp refresh-time

  E. router rsvp keep-multiplier

  Correct Answer: A