Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 565

What are two features of BFD? (Choose two.)

Answer options

• A. reliable
• B. replaces hello messages
• C. requires routing protocols
• D. scalable
• E. intensive on CPU for Layer 2 links

Correct answer: B, D

Explanation

The correct answers are B and D because BFD is designed to replace traditional hello messages with a more efficient mechanism and is scalable to support many sessions. Options A, C, and E are incorrect as BFD is not inherently reliable, does not require routing protocols to function, and while it can be resource-intensive, it is not necessarily so for Layer 2 links.