(Master the process and configuration of PPPPAP authentication? The authentication function of PPP refers to verifying the password during the process of establishing a PPP link. The PPP protocol supports two authentication methods PAP and CHAP. PAP (PasswordAuthenticationProtocol, Password Authentication Protocol) refers to the authentication process through two handshakes on both sides of the authentication. It is a method for authenticating users who attempt to log in to the Point-to-Point Protocol server. An authentication request is automatically issued by the authenticated party, including the authenticated username and password. A reply is made after verification by the verification party, and the verification passes or fails. Usernames and passwords are transmitted over the link in clear text during the authentication process.)
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