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Which of the following statements about BFD control packets are true? (Choose three.)

A. A BFD control packet is encapsulated in a UDP packet for transmission. Authentication fields in a BFD control packet are optional.

B. BFD detection is not available in VRP 5.7.

C. Echo packets use UDP destination port number 3784.

D. Echo packets use UDP destination port number 3785.

Explanation:

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