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Which of the following is not a type of OSPF packet?

(a) Hello

(b) Link-state request

(c) Link-state response

(d) Link-state ACK

This question was addressed to me by my college director while I was bunking the class.

I need to ask this question from OSPF topic in portion Network Layer of Computer Network

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The correct choice is (c) Link-state response

For explanation: The five types of OSPF packets are: Hello, Database description, Link-state request, Link-state update, and Link-state ACK. There is no Link-state response packet; the neighbor router sends a Link-state update packet as a response to the Link-state request packet if there is an update in the routing table.

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