JN0-649 · Question #178
In OSPF, how does a router ensure that LSAs advertised to a neighboring router are received?
The correct answer is C. LSAs are acknowledged by the neighboring router. Link-state acknowledgment (LSAck)messages provide reliability to the link-state exchange process, by explicitly acknowledging receipt of a Link State Update message. The LSA acknowledgment, explicitly acknowledged, that it have received a LSA, by mirroring it back.
Question
In OSPF, how does a router ensure that LSAs advertised to a neighboring router are received?
Options
- ALSA flooding guarantees that all routers will receive them successfully.
- BLSAs are sent over a TCP connection.
- CLSAs are acknowledged by the neighboring router.
- DLSAs are advertised with an acknowledgement bit.
How the community answered
(43 responses)- A12% (5)
- B2% (1)
- C79% (34)
- D7% (3)
Explanation
Link-state acknowledgment (LSAck)messages provide reliability to the link-state exchange process, by explicitly acknowledging receipt of a Link State Update message. The LSA acknowledgment, explicitly acknowledged, that it have received a LSA, by mirroring it back.
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