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 linkstate protocol.[S3] After a topology change, a link state protocol will converge faster than a distance vectorprotocol.Which one of the following is correct about S1, S2, and S3?

S1, S2, and S3 are all true.

S1, S2, and S3 are all false

S1 and S2 are true, but S3 is false.

S1 and S3 are true, but S2 is false

Solution:

Statement 1: TRUEThe 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 information.Statement 2: FALSEPersistent looping can be avoided with the help of split horizon in DVR but there is no concept of persistent looping in LSR, in LSR only temporary loop exist and can automatically solved by system or router.Statement 3: TRUEAfter a topology change, a link state protocol will converge faster than a distance vector protocol.Therefore option 4 is correct.Important Point:LSR ? Link State RoutingDVR ? Distance Vector Routing

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