Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 328

Which failure detection mechanism is used for BFD?

Answer options

• A. consistent rate
• B. Layer 2 protocol failure
• C. variable rate
• D. routing protocol failure

Correct answer: A

Explanation

The correct answer is A, as BFD (Bidirectional Forwarding Detection) relies on a consistent rate of hello packets to detect failures quickly. Options B, C, and D refer to different failure detection methods or layers that do not apply to BFD specifically.