642-902 Q&A – Implement a multi-area OSPF Network (66-70)

Section 2 – Implement a multi-area OSPF Network, given a network design and a set of requirements

QUESTION NO: 66
Which two routing interface parameters are supported in OSPF implementations? (Choose two.)
A. retransmit-interval
B. dead-interval
C. stub area
D. virtual link
E. NSSA area
Answer: AB

QUESTION NO: 67
Refer to the exhibit. All routers have simultaneously been reloaded, and the DR election has concluded as expected. Which state is RTC in? Select the best response.

66
A. 2WAY/DROTHER
B. 2WAY/BDR
C. 2WAY/DR
D. FULL/DROTHER
E. FULL/BDR
F. FULL/DR
Answer: E

QUESTION NO: 68
Refer to the exhibit. You have completed an OSPF implementation, and you are verifying OSPF operation. You notice that router A and router B are stuck in the two-way state. From the show ip ospf interface command output, what is the cause of this issue? Select the best response.

67
A. All OSPF implementations must have at least one interface in area 0.
B. You are attempting to run in the broadcast mode over an NBMA interface.
C. Both routers are configured to function as a BDR; therefore, there is no DR router.
D. Someone has changed the OSPF router ID; therefore you must clear the OSPF process.
E. The OSPF priority is set to 0 on both routers; therefore neither can become the DR.
Answer: E

QUESTION NO: 69
Refer to the exhibit. OSPF is running throughout the network. You want to minimize the propagation of LSAs into and out of Area 1.
Which OSPF feature would best achieve this goal? Select the best response.

69
A. stub
B. totally stubby
C. NSSA
D. totally NSSA
Answer: D

QUESTION NO: 70
Which statement is true about OSPF Network LSAs? Select the best response.
A. They are originated by every router in the OPSF network. They include all routers on the link, interfaces, the cost of the link, and any known neighbor on the link.
B. They are originated by the DR on every multi-access network. They include all attached routers including the DR itself.
C. They are originated by Area Border Routers and are sent into a single area to advertise destinations outside that area.
D. They are originated by Area Border Router and are sent into a single area to advertise an Autonomous System Border Router.
Answer: B
Explanation:
The point of this question is OSPF Network LSAs
The feature of OSPF Network LSAs is that they are generated by DR, and DR only exist on multi-access network, the use of OSPF Network LSAs is that it list all neighbors around and send it to every router which run OSPF.
Incorrect Answer: OSPF Network LSAs are not originated by Area Border Routers.

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