OSPF Question

Unanswered Question
Sep 10th, 2007


Whilst doing some study I came across this question which has got me a bit confused:

"In an OSPF network, neighbor relationships all the topology to scale. What are two reason as to why this can help a network topology scale"

A) Neighbour adjacencies control the distribution of routing protocol updates

B) Routing table information does not flood the network until holddown times have expired

C)Hello protocol is a more efficient means of sending routing updates that the table exchanges used in RIP

D)Topological database is maintained with incremental updates with full exchanges occurring only every 30 mins

According to the text book the answer is A and C.

I agree with A. But I didn't think C was correct because the hello protocol is not used to send routing updates, it is used for dynamic neighbor discovery and maintaining neighbor relationships.

I would of chosen A and D.

Is C really correct?


I have this problem too.
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etienne.basset Mon, 09/10/2007 - 04:46


you're right C is false, hello protocol don't send routing updates.

For D we can accept it as true, even if there isn't a full exchange every 30 minutes [self-originated LSA are refreshed individually every 30 minutes -paced every 4minutes by default- ]



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