+**Bfd** (Bidirectional Forwarding Detection) is a simple, low-overhead [network protocol](/wiki/network_protocol) used to detect faults in the path between two forwarding engines. It provides rapid [failure detection](/wiki/failure_detection) for all media types and protocols, ensuring swift adaptation to changes in network topology.
+## See also
+- [Routing Protocol](/wiki/routing_protocol)
+- [Network Reliability](/wiki/network_reliability)
+- [IP](/wiki/ip)
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