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Mr. Dubey • 52.30K Points
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Q. In OSPF, which protocol is used to discover neighbour routers automatically?

(A) link state protocol
(B) error-correction protocol
(C) routing information protocol
(D) hello protocol
Correct : Option (D)

Explanation: 
 hello protocol is used to discover neighboring routers automatically. it makes sure that the communication between neighbors is bidirectional. it’s similar to the real world moral construct of saying “hello” to initialize the communication.

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