Which two statements about using the CHAP authentication mechanism in a PPP link are true?()

Question

A.CHAP uses a two-way handshake

B.CHAP authentication periodically occurs after link establishment

C.CHAP has no protection from playback attacks

D.CHAP authentication is performed only upon link establishment

E.CHAP uses a three-way handshake

F.CHAP authentication passwords are sent in plaintext

Answer 1

参考答案：B, E