[2] MAMAKOS L,LIDL K,EVARTS J,et al..A method for transmitting PPP over ethernet (PPPoE)[Z].RFC2516,February 1999

[6] WILLIAM S.Cryptography and Network Security Principles and Practices,Fourth Edition[M].Beijing.Publishing House of Electronics Industry,2006

[7] SIMPSON W E.The Point-to-Point Protocol (PPP)[Z].RFC1661,July 1994

[8] MCGREGOR G.The PPP Internet Protocol Control Protocol (IPCP)[Z].RFC1332,May 1992

[9] LIOYD B,SIMPS()N W.PPP Authentication Protocols[Z].RFC1334,October 1992

[10] SIMPSON W.PPP Challenge Handshake Authentication Protocol (CHAP)[Z].RFC1994,August 1996