Q.

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
Answer» C. link-state response
Explanation: The five types of OSPF packets are: Hello, Database description, Linkstate
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
Linkstate request packet if there is an update in the routing table.
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