Nokia Nokia Certifications 4A0-C01 Questions & Answers

• Question 571:

  LDP is enabled on both ends of a point-to-point link, but the "show router Idp status" command indicates that LDP is operationally down. The Oper Down Reason field shows the message "systemIpDown." What

  might cause this condition?

  A. The LSP is in the administrative down state.

  B. The router's router ID overlaps another.

  C. The router's interfaces do not have LDP running.

  D. The router's system interface requires an IP address

  Correct Answer: D

• Question 572:

  Click on the exhibit.

  

  The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. An operator successfully configures multi-topology IS-IS routing so that the IPv6 system addresses are also exchanged between routers.

  After IPv6 has been configured, which of the following is TRUE?

  A. Router R2 has two IS-IS adjacencies and two LSPs

  B. Router R2 has two IS-IS adjacencies and three LSPs

  C. Router R2 has two IS-IS adjacencies and four LSPs

  D. Router R2 has three IS-IS adjacencies and three LSPs

  E. Router R2 has three IS-IS adjacencies and four LSPs

  F. Router R2 has three IS-IS adjacencies and six LSPs

  Correct Answer: C

• Question 573:

  What is the replacement for ARP in IPv6?

  A. The use of Broadcast messages in combination with Neighbor Advertisement messages.

  B. The use of Anycast addresses in combination with Neighbor Advertisement messages.

  C. The use of Solicited-node multicast addresses in combination with Neighbor Advertisement messages.

  D. The use of Anycast addresses in combination with Link-Local Advertisement messages.

  Correct Answer: C

• Question 574:

  When configuring an LSP for fast reroute one-to-one protection, which of the following statements is true?

  A. The LSP can also use facility backup.

  B. The LSP is limited to node protection.

  C. You cannot request bandwidth on the protected LSP.

  D. Node protection can be disabled.

  Correct Answer: D

• Question 575:

  Which of the following statements regarding OSPF routing updates on a point-to-point link is true?

  A. On a point-to-point link, there is no need for a DR and BDR election; all routing updates are sent to

  224.0.0.5.

  B. On a point-to-point link, a DR and BDR are elected. The DR sends link-state advertisements describing the network.

  C. On a point-to-point link, a DR and BDR are elected. To ensure resiliency, both the DR and BDR send link-state advertisements describing the network.

  D. On a point-to-point link, there is no need for a DR and BDR election. All routing updates are sent to the unicast address of the neighbor's interface.

  Correct Answer: A

• Question 576:

  Which of the following statements regarding RSVP refresh reduction are true1? (Choose two)

  A. Message-IDs replace individual refresh messages.

  B. Refresh reduction applies only to reservation messages.

  C. RSVP generates a summary-refresh message for each LSP.

  D. An LSP state change causes an incremented Message-ID.

  Correct Answer: AD

• Question 577:

  Click on the exhibit.

  

  Router R5 is advertising the three loopbacks prefixes shown in OSPFv3. The following command is executed on router R1: R1# configure router ospf3 area 0 area-range FD00:11:11:5000:764.

  Which of the following is TRUE regarding the OSPFv3 LSDB on R6?

  A. Router R6 will have a single Router LSA that describes the summary prefix.

  B. Router R6 will have three Router LSAs - one to describe each loopback prefix.

  C. Router R6 will have a single Inter-Area Prefix LSA to describe the summary prefix.

  D. Router R6 will have three Inter-Area Prefix LSAs - one to describe each loopback prefix.

  E. Router R6 will not have any LSAs to describe the loopback prefix or the summarized prefix.

  Correct Answer: C

• Question 578:

  Which of the following statements regarding LSP path configuration are true? (Choose three)

  A. The path must include at least one hop.

  B. The path may be used multiple times in a single LSP.

  C. The path may comprise loose hop entries only.

  D. The path must define the LSP's tail end.

  E. The path may be used for multiple LSPs.

  Correct Answer: CE

• Question 579:

  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 580:

  Refer to the exhibit below. The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. An operator successfully configures multi-topology IS-IS routing so that the IPv6 system addresses are also exchanged between routers. Which of the following statements best describes the number of IS-IS adjacencies and the number of LSPs in the LSDB of R1 AFTER IPv6 has been configured?

  

  A. R1 has one IS-IS adjacency and one LSP.

  B. R1 has one IS-IS adjacency and two LSPs.

  C. R1 has one IS-IS adjacency and four LSPs.

  D. R1 has two IS-IS-adjacencies and two LSPs

  E. R1 has two IS-IS adjacencies and four LSPs

  Correct Answer: B