CHAP: 挑战握手认证协议 (challenge-handshake authentication protocol)
DSL: 数字用户线路 (digital subscriber line)
IETF: 互联网工程任务组 (Internet Engineering Task Force)
IP: 互联网协议 (Internet protocol)
IPsec: IP 认证与安全协议 (IP authentication and security protocols)
MSCHAP: Microsoft CHAP
MPPE: Microsoft 点对点加密 (Microsoft point-to-point encryption)
PAC: PPTP 接入集中器 (PPTP access concentrator)
PAP: 密码认证协议 (password authentication protocol)
PPP: 点对点协议 (point-to-point protocol)
PPTP: 点对点隧道协议 (point-to-point tunneling protocol)
RAS: 远程接入服务器 (remote-access server)
RFC: 征求意见稿 (request for comment)
VPN: 虚拟专用网络 (virtual private network)