What is the purpose of HELLO packets in the OSPF protocol? a. b. c. d. Keep the links between neighbor routers alive. Update routing table by exchanging information between neighbors. For broadcasting link state advertisement information. All of these.
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Answer: a. Keep the link between neighbor router alive.
Explanation: It's regular process which take place in every 10 sec. It's just like saying hi I'm here in working condition.
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Answer:
Keep the links between neighbor routers alive
Explanation:
OSPF router generates hello packets for every 10 secs for P2P network. But sends hello packets for every 30 secs for NBMA. These Hello packets contains, OSPF router id, Hello interval Timer, Dead Interval timer, Authentication password, Subnetmask, Area ID, etc.
There are some situations where this Hello packets mismatch happens. These hello packets act like a keep alive mechanism.
If there is a mismatch then, a Bounce relation occurs.
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