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Question 14 - NSE7_EFW-7.2 discussion

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Which two statements about the BFD parameter in BGP are true? (Choose two.)

A.
It allows failure detection in less than one second.
Answers
A.
It allows failure detection in less than one second.
B.
The two routers must be connected to the same subnet.
Answers
B.
The two routers must be connected to the same subnet.
C.
It is supported for neighbors over multiple hops.
Answers
C.
It is supported for neighbors over multiple hops.
D.
It detects only two-way failures.
Answers
D.
It detects only two-way failures.
Suggested answer: A, C

Explanation:

Bidirectional Forwarding Detection (BFD) is a rapid protocol for detecting failures in the forwarding path between two adjacent routers, including interfaces, data links, and forwarding planes. BFD is designed to detect forwarding path failures in a very short amount of time, often less than one second, which is significantly faster than traditional failure detection mechanisms like hold-down timers in routing protocols.

Fortinet supports BFD for BGP, and it can be used over multiple hops, which allows the detection of failures even if the BGP peers are not directly connected. This functionality enhances the ability to maintain stable BGP sessions over a wider network topology and is documented in Fortinet's guides.

asked 18/09/2024
Valerio Pietrantoni
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