Nokia Nokia Certifications 4A0-101 Questions & Answers

• Question 51:

  Link-state PDUs include an age field. Which of the following is FALSE?

  A. When link-state information reaches the maximum age on a router, the router will flood that information to its neighbors.

  B. When a router detects that any of its link-state information has reached the maximum age, it will request a new update from the source router.

  C. Aging helps ensure that links, which are no longer part of the topology, will eventually get removed from the LSDB.

  D. The age value is updated as the information is flooded throughout the network and when it is in the LSDB.

  Correct Answer: B

• Question 52:

  Which component of the Alcatel-Lucent 7750 SR is in charge of performing the longest prefix match lookup on packets that arrive on the physical interfaces?

  A. CPM

  B. MDA

  C. Switch Fabric

  D. IOM

  Correct Answer: D

• Question 53:

  Click on the exhibit.

  

  Two neighboring OSPF routers have exchanged the packets shown. What state is the adjacency in?

  A. Down

  B. Initializing

  C. 2-way

  D. Full

  Correct Answer: D

• Question 54:

  If the OSPF reference bandwidth is set to 1000 Gbps. what is the cost of a 1 Gbps interface?

  A. 1

  B. 10

  C. 100

  D. 1000

  Correct Answer: D

• Question 55:

  An OSPF backbone area contains Type 5 LSAs. If an attached area receives only Summary LSAs from the backbone area, what type of area is the attached area?

  A. Normal

  B. Stub

  C. Totally stubby

  D. Totally NSSA

  Correct Answer: B

• Question 56:

  An OSPF router receives an update in which the sequence number, age, and checksum are the same as the entry already in the topological database. What action does the router take?

  A. The link-state information is not populated in the database, but is forwarded to all neighbors.

  B. The link-state information already in the database is overwritten and the age is reset.

  C. The link-state information is not populated in the database and an acknowledgement is sent.

  D. The link-state information is regarded as old and nothing is done.

  E. A link-state request is performed to increase the sequence number.

  Correct Answer: C

• Question 57:

  Click on the exhibit.

  

  The operator of an IS-IS network wishes to have link metrics dynamically calculated in the same manner as OSPF. The router with system address 10.10.10.1 is one hop away on a 1Gbps link

  Which of the following is correct?

  A. The router is correctly configured.

  B. Neither a reference-bandwidth nor wide-metrics is configured on the router.

  C. A reference-bandwidth is configured on the router but wide-metrics is not.

  D. Wide-metrics is configured on the router but a reference-bandwidth is not.

  Correct Answer: C

• Question 58:

  Click on the exhibit.

  

  Router R1 distributes its loopbacks into IS-IS and globally routed addresses are configured as shown.

  How many routes will router R4 have in its IPv6 route table?

  A. 1

  B. 2

  C. 3

  D. 4

  E. 6

  F. 7

  Correct Answer: C

• Question 59:

  What is the primary purpose of variable length subnet masks (VLSM)?

  A. To reduce the size of each routing update.

  B. To allow interoperability between routing protocols.

  C. To allow different subnet masks for different subnets.

  D. To reduce the size of the routing table.

  Correct Answer: C

• Question 60:

  Which of the following is FALSE about the databases used by a link-state routing protocol in a single area routing domain?

  A. The link-state database has local topology information from all the routers.

  B. The adjacency database contains all the links between all the routers.

  C. The forwarding database contains the next hop for all known prefixes.

  D. The link-state database is the same for all routers.

  Correct Answer: B