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352-001 · Question #140
352-001 Question #140: Real Exam Question with Answer & Explanation
The correct answer is A: BFD can provide failure detection in less than one second.. BFD provides sub-second failure detection and integrates as a consistent detection mechanism across multiple routing protocols, making it highly valuable for scalable and responsive network designs.
Question
What are two benefits of using BFD for failure detection in the design of a network? (Choose two.)
Options
- ABFD can provide failure detection in less than one second.
- BBFD can be used as a generic and consistent failure detection mechanism for EIGRP, IS-IS,
- CBFD eliminates router protocol hello notification.
- DBFD can be used for all types of network interfaces.
- EBFD is independent of the network protocol.
Explanation
BFD provides sub-second failure detection and integrates as a consistent detection mechanism across multiple routing protocols, making it highly valuable for scalable and responsive network designs.
Common mistakes.
- C. BFD does not eliminate routing protocol hello mechanisms; it supplements them by providing faster detection while protocol hellos continue to maintain neighbor relationships independently.
- D. BFD cannot be used on all interface types; it has known limitations on certain multi-access, asynchronous, and tunnel interfaces where it may be unsupported or unreliable.
- E. BFD is not fully independent of the network protocol in practice; it must be explicitly configured alongside specific routing protocols, which then act on BFD failure notifications to trigger reconvergence.
Concept tested. BFD sub-second failure detection and protocol integration
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