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随着Internet在企业领域应用的不断深化,VPN(虚拟专用网,Virtual Private Network)作为一种廉价安全的组网方案越来越受到人们的青睐。在北美和欧洲,VPN已经是一项相当普遍的业务;在亚太地区,该项服务也迅速开展起来。有预测称2001年全球VPN市场将达到120亿美元。 VPN分四种 VPN指的是依靠ISP和NSP(网络服务提供商),在公用网络中建立专用的数据通信网络的技术。在虚拟专用网中,任意两个节点之间的连接并没有传统专网所需的端到端的物理链路,而是利用某种公众网的资源动态组成的。从面世到成熟,VPN经历了技术不断完善的过程。目前,市场上的VPN解决方案有四种,最常用的是
With the deepening application of Internet in the enterprise field, VPN (Virtual Private Network) is more and more popular as a cheap and safe networking scheme. In North America and Europe, VPN is already a fairly common business; in the Asia Pacific region, the service is rapidly being rolled out. It is predicted that in 2001 the global VPN market will reach 12 billion US dollars. VPN Four VPNs refer to the technology that relies on ISPs and NSPs (Network Service Providers) to establish a dedicated data communications network in a public network. In a virtual private network, the connection between any two nodes does not have the end-to-end physical link required by a traditional private network. Instead, the connection is made dynamically using the resources of a public network. From launch to maturity, VPN has undergone continuous improvement of technology. Currently, there are four VPN solutions on the market, the most commonly used ones