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4A0-C01 · Question #377
4A0-C01 Question #377: Real Exam Question with Answer & Explanation
The correct answer is A. The router sends a link-state update to its neighbor.. See the full explanation below for the reasoning.
Question
A router receives an OSPF database description packet from a neighbor that references an LSA, which is already in the router's LSDB. The sequence number in the DBD packet is lower than the sequence number of the LSA in the LSDB. What action does the router take?
Options
- AThe router sends a link-state update to its neighbor.
- BThe router sends a link-state acknowledgement to its neighbor.
- CThe router updates the information in its LSDB with the information received from its neighbor.
- DThe router sends a link-state request to its neighbor.
- EThe router takes no action.
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