300-410 · Question #95
The OSPF dead interval defaults to how many times the hello interval?
The correct answer is C. Four. In OSPF, the dead interval is a critical timer that defaults to four times the hello interval.
Question
Options
- ATwo
- BThree
- CFour
- DFive
How the community answered
(36 responses)- B3% (1)
- C94% (34)
- D3% (1)
Why each option
In OSPF, the dead interval is a critical timer that defaults to four times the hello interval.
Two times the hello interval is not the default OSPF dead interval.
Three times the hello interval is not the default OSPF dead interval.
The OSPF dead interval defaults to four times the hello interval. If an OSPF router does not receive a hello packet from a neighbor within this dead interval, it declares the neighbor down and removes it from its adjacency table. This ensures network convergence and reliable neighbor detection.
Five times the hello interval is not the default OSPF dead interval.
Concept tested: OSPF dead interval default ratio
Source: https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/7039-1.html#tim
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