3TOWNSLEY W, VALENCIA A, RUBENS A, et al. Layer Two Tunneling Protocol (L2TP) [EB/OL]. ftp://ftp. isi.edu/in-notes/rfc2661. txt, 1999-08.
4RFC 2402-1998. IP Authentication Header [S].
5RFC2406-1998. IP Encapsulating Security payload (ESP) [S].
6RFC 3031-2001. Callon R. Multiprotocol Label Switching Architecture [S].
7杨喜权 张华.统一网络体系结构的研究[J].东北师范大学学报,2004,:55-59.
8RFC2058-1997. RIGNEY C, RUBENS A, et al. Remote Authentication Dial In User Service (RADIUS) [ S].
9杨喜权 樊秀梅.计算机网络与通信[M].北京:北京希望电子出版社,2004..
10GARY SCOTT MALKIN. Dial-in Virtual Private Networks Using Layer 3 Tunneling [ A]. 22nd Annual IEEE International Conference on Local Computer Networks (LCN97) [ C ]. USA: IEEE Computer Society Press, 1997: 555.
