摘要
虚拟拨号专用网络(VPDN:V irtual Private D ialup Network)是VPN(V irtual Private Network)应用扩展。为有效地降低封装开销,在简要介绍了VPDN第2层实现的基本原理基础上,对VPDN关键技术进行了分析,比较了PPTP(Point to Point Tunneling Protocol)和L2TP(Layer 2 Tunneling Protocol)隧道协议封装形式以及IPSec的安全特点。提出了第3层基于MPLS(Mu lti Protocol Label Sw itch)实现VPDN的设计方法以及VPDN需要进一步研究的问题。该方案可降低封装开销约5.8%,为第3层VPDN研究提供了一个有益的设计思路。
VPDN (Virtual Private Dialup Network ) extends VPN (Virtual Private Network ) in the applications. The basic theory of VPDN is introduction to realization of second layer and some key issues are discussed. The tunnel protocols of PPTP ( Point to Point Tunneling Protocol) and L2TP ( Layer 2 Tunneling Protocol) are compared and security characteristic of IPSec ( Internet Protocol Security) is analyzed. This paper puts forward design method of VPDN on MPLS ( Multi Protocol Label Switch) in the realization of third layer and more study problems. This project can effectively reduce encapsulation cost and offer a profitable think of design for third layer VPDN.
出处
《吉林大学学报(信息科学版)》
CAS
2005年第5期511-516,共6页
Journal of Jilin University(Information Science Edition)
基金
国家自然科学基金资助项目(60473042)
关键词
虚拟路由网络
虚拟拨号专用网络
点对点隧道协议
第2层隧道协议
internet安全协议
virtual private network (VPN)
virtual private dialup network (VPDN)
point to point tunneling protocol (PPTP)
layer 2 tunneling protocol (L2TP)
internet protocol security (IPSec)