Which of the following statements about BFD control packets are true? (Choose three.)
Which of the following statements about BFD control packets are true? (Choose three.)
A BFD control packet is encapsulated in a UDP packet for transmission, and the authentication fields in a BFD control packet are optional. Echo packets use UDP destination port number 3785. Echo packets do not use UDP destination port number 3784; instead, control packets use this port.
Protocol suite: TCP/IP. Protocol type: Application layer protocol. Ports: 3784 (UDP) control. 3785 (UDP) echo. 4784 (UDP) multihop control.
sooo... should be D, then? Also, I believe BFD v1 was available in VRP5.7