CCDE: Cisco Certified Design Expert (Practical) — Question 184

Which two statements explain the operation of BFD asynchronous mode? (Choose two.)

Answer options

• A. BFD asynchronous mode with echo packets uses separate control packets and echo packets
• B. BFD asynchronous mode with and without echo packets use control packets
• C. BFD asynchronous mode with echo packets combines the control packets and echo packets into a single packet
• D. BFD asynchronous without echo packets has control packets sent back to the originating router, which echoes the control packet to detect failures
• E. BFD asynchronous mode without echo packets uses control packets, and BFD asynchronous mode with echo packets does not

Correct answer: A, B

Explanation

The correct answers are A and B because BFD asynchronous mode indeed uses separate control and echo packets (A) and employs control packets regardless of whether echo packets are used (B). Options C, D, and E are incorrect as they misrepresent the functionality of BFD asynchronous mode, particularly in how it handles echo packets and control packets.