Nokia Nokia Certifications 4A0-101 Questions & Answers

• Question 201:

  What causes an adjacency to change from "Init" to "Two Way"?

  A. When a Link State Update is received in response to a Link State Request

  B. When a router receives a Hello packet from a neighbor that contains its router id in the neighbor list

  C. When OSPF neighbors exchange Database Descriptor packets

  D. When a Link State Acknowledgement is received in response to a Link State Update

  Correct Answer: B

• Question 202:

  Click the exhibit button.

  

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

  A. Full; both routers are exchanging Helios to maintain the adjacency.

  B. The adjacency is down.

  C. The adjacency is in exstart state.

  D. The adjacency is in the exchange state.

  Correct Answer: C

• Question 203:

  When an OSPF adjacency is stuck in the "ExchStart" state, what is the most likely cause?

  A. The MTU does not match on both interfaces

  B. OSPF is not enabled on one of the routers

  C. The Router ID is the same on both routers

  D. A OSPF Hello has not been received from the neighbor

  Correct Answer: A

• Question 204:

  Select the answer below that correctly lists the 5 different OSPF packet types.

  A. Hello, Link State Update, Link State Packet, Link State Acknowledgement, Database Descriptor

  B. Link State Update, Link State Refresh, Link State Acknowledgement, Database Descriptor, Notification

  C. Hello, Link State Refresh, Link State Update, Link State Acknowledgement, Link State Authentication

  D. Hello, Link State Update, Link State Request, Link State Acknowledgement, Database Descriptor

  Correct Answer: D

• Question 205:

  What best describes the type of packets used by OSPF routers to exchange updates on a pointto- point link?

  A. IP packets sent to an IP multicast address.

  B. Ethernet frames sent to an Ethernet multicast address.

  C. IP packets sent to an IP unicast address.

  D. UDP packets sent to an IP multicast address.

  Correct Answer: A

• Question 206:

  Graceful Restart is supported by what IGPs?

  A. RIPv1 and RIPv2

  B. OSPF

  C. IS-IS

  D. BGP

  Correct Answer: BC

• Question 207:

  What are some of the characteristics of Alcatel-Lucent's implementation of non-stop routing? (Choose two)

  A. No protocol extensions required

  B. Only supported by OSPF and IS-IS

  C. Transparent to routing neighbors

  D. Uses Graceful Restart to inter-operate with other vendors

  Correct Answer: AC

• Question 208:

  The Alcatel-Lucent 7750 SR supports which two of the OSPF area types below?

  A. Not So Stubby Areas

  B. Level 1 Areas

  C. Stub Areas

  D. Partially Stubby Areas

  Correct Answer: AC

• Question 209:

  What command will show the OSPF neighbors, and their status on the Alcatel-Lucent 7750 SR?

  A. Show ospf neighbors

  B. Show router ospf neighbors

  C. Show router ospf adjacency

  D. Show ospf adjacency

  Correct Answer: B

• Question 210:

  Which of the LSA types stay within an OSPF area and are not exported outside of the area? (Choose all that apply)

  A. Router LSA

  B. Network LSA

  C. Summary Network LSA

  D. Summary Router LSA

  Correct Answer: AB