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QID: AR075 - What is advantage of using BFD - adilnasser3 - 08-04-2026
The correct answer should be:
It has sub-second failure detection for layer 1 and layer 2 problems.
See this info from cisco's website to substantiate my above opinion above:
https://www.cisco.com/en/US/technologies/tk648/tk365/tk480/technologies_white_paper0900aecd80244005.html
CONCLUSION
Bidirectional Forwarding Detection provides a method for network administrators to configure sub-second Layer 2 failure detection between adjacent network nodes. Furthermore, they can configure their routing protocols to respond to BFD notifications, and begin Layer 3 route convergence almost immediately.