JN0-281 Exam Dumps | What is the main purpose of Bidirectional Forwarding Detection (BFD)?

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Juniper.JN0-281.v2025-08-18.q93
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Question 12/93

What is the main purpose of Bidirectional Forwarding Detection (BFD)?

A. to detect network path failures

B. to determine if the forwarding routes are correct

C. to detect the forwarding protocol

D. to determine packet round-trip latency

Correct Answer: A

Bidirectional Forwarding Detection (BFD) is a network protocol used to detect failures in the network path between two devices quickly.
Step-by-Step Breakdown:
Path Failure Detection:
BFD provides a low-overhead mechanism for detecting failures in forwarding paths across Layer 3 networks. It is much faster than traditional routing protocol timers and can detect failures within milliseconds.
BFD in Routing:
BFD can be integrated with routing protocols like OSPF, BGP, or IS-IS to trigger a faster convergence when a network path goes down.
Juniper Reference:
BFD Configuration: Juniper devices use BFD to monitor network paths and ensure fast failure detection, enhancing network resilience.

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