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Computer-Networks
September 7, 2024
Routing
September 7, 2024
Computer-Networks
September 7, 2024
Routing
September 7, 2024

Routing

Question 8

Consider the following three statements about link state and distance vector routing protocols, for a large network with 500 network nodes and 4000 links.

    [S1] The computational overhead in link state protocols is higher than in distance vector protocols.
    [S2] A distance vector protocol (with split horizon) avoids persistent routing loops, but not a link state protocol.
    [S3] After a topology change, a link state protocol will converge faster than a distance vector protocol.

Which one of the following is correct about S1, S2, and S3 ?

A
S1, S2, and S3 are all true.
B
S1, S2, and S3 are all false.
C
S1 and S2 are true, but S3 is false.
D
S1 and S3 are true, but S2 is false.
Question 8 Explanation: 
S1: The computational overhead in link state protocols is higher than in distance vector protocols. Because LSR is based upon global knowledge whereas DVR is based upon Local info.(True)

S2: A distance vector protocol with split horizon avoid persistent routing loops is true, but not a link state protocol is false because link state protocols do not have count to infinity problem.
S3: As Distance vector protocol has count to infinity problem and converges slower. (True)

Correct Answer: D
Question 8 Explanation: 
S1: The computational overhead in link state protocols is higher than in distance vector protocols. Because LSR is based upon global knowledge whereas DVR is based upon Local info.(True)

S2: A distance vector protocol with split horizon avoid persistent routing loops is true, but not a link state protocol is false because link state protocols do not have count to infinity problem.
S3: As Distance vector protocol has count to infinity problem and converges slower. (True)

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