Huawei H12-821_V1.0 Question Answer
Which of the following is used as the destination port for single-hop BFD?
UDP port 3784
UDP port 4784
TCP port 3784
TCP port 4784
Comprehensive and Detailed Step-by-Step Explanation:
Single-Hop BFD:
Single-hop BFD is used for detecting link failures in directly connected devices.
It uses UDP port 3784 for communication.
Multi-Hop BFD:
For multi-hop scenarios, BFD uses UDP port 4784 to ensure end-to-end connectivity.
Incorrect Options:
TCP ports 3784 and 4784 (C and D): BFD does not use TCP.
TESTED 29 Jul 2026
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