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, 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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