多选题PAP验证协议有哪几种数据报文类型（）.AAuthenticate-RequestBAuthenticate-AckCAuthenticate-FailDAuthenticate-Nak
题目
多选题
PAP验证协议有哪几种数据报文类型（）.
A
Authenticate-Request
B
Authenticate-Ack
C
Authenticate-Fail
D
Authenticate-Nak
Authenticate-Request
Authenticate-Ack
Authenticate-Fail
Authenticate-Nak