摘要： ＶＰＮ（虚拟专用网）技术正在改变人们的工作和生活，它能够使企业以较低的成本实现企业ＩＮＴＲＡＮＥＴ网与合作伙伴、商业伙伴、外地办事处之间的安全接入；典型的ＶＰＮ应用领域有外联网ＶＰＮ、远程访问ＶＰＮ利内联网ＶＰＨ：实现ＶＰＮ的产品方案层出不穷，但所有产品大都可归于以下三类：以硬件为基础的ＶＰＮ产品方案、以硬件为基础的ＶＰＮ产品方案、单独的ＶＰＮ应用程序包（软件）产品方案。其中每一种产品方案都有其各自的优点和缺点，究竟使用哪种产品方案最合适，同客户的实际需求息息相关。虽然ＶＰＮ应用在国内并不多，但相信随着企业对ＶＰＮ认识的深入、市场竞争的加剧、分支机构范围的扩大，构建ＶＰＮ的国内企业将越来越多。

关键词: 虚拟专用网, 存取控制, 用户认证, 加密, 服务质量, 隧道技术

Abstract: Virtual private network technology is changing the work and life style of people, it can make enterprises to connect with commercial partners, remote offices and so on safely with comparatively low costs: Typical VPN application areas are EXTRANET VPN, REMOTE VPN, INTRANET VPN; although there are many kinds of VPN solutions, almost every one of them can be classified into three types: hardware-based solution, firewall-based solution, software-based solution. Every kind of solutions has its own disadvantages and advantages, in this way,which kind of solution should be used on one occasion is very hard to decide, it depends on the needs of enterprises .Nowadays the VPN technology has not been widely applied in the mainland, but 1 maintain that it has a bright future with the deeper understanding of VPN technology, the hardening of competition, the widening of branch departments, the enterprises which applies VPN technology will be more and more.

中图分类号: 

• TP393.02