试题详情
- 多项选择题Which two statements about using the CHAP authentication mechanism in a PPP link are true?（）
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
- B,E
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