What are three circumstances under which a router sends link-state PDUs (LSPs)?
(Choose three)
A.
LSPs are sent periodically every 9 seconds
B.
LSPs are sent when there is a network change
C.
LSPs are sent during adjacency formation
D.
LSPs are sent in response to CSNP messages
E.
LSPs are sent in response to PSNP messages
My opinion is that “D” is the right answer instead of “C”
In multi-access networks if a router sees that it has a newer version of an LSP, or it has an LSP that the DIS does not advertise in its CSNP, the router will send the newer or missing LSP to the DIS.
Furthermore I am only aware the LSPs are sent during the initial start-up of the routing process but not during the adjacency formation.
Hence I would go with “D” instead of “C”
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