A、EIGRP supports five generic packet types, including hello, database description (DBD), link state request (LSR), link - state update (LSU), and LSAck.

B、EIGRP sends periodic hello packets to the multicast IP address 224.0.0.10.

C、EIGRP will not form a neighbor relationship with another peer when their K values are mismatched.

D、EIGRP sends periodic hello packets to the multicast IP address 224.0.0.9.

E、E IGRP will form a neighbor relationship with another peer even when their K values are mismatched.

F、EIGRP supports five generic packet types, including hello, update, query, reply, and ACK packets.