论文部分内容阅读
一、VPN概述近年来，随着因特网的广泛应用，如何利用因特网的资源组建企业的虚拟专用网络（VPN），已成为IT业界的一个新热点。许多ISP厂商已提供或正计划提供增值VPN服务。VPN指的是依靠Internet服务提供者ISP）和其他网络服务提供者NSP）在公用网络中建立专用的数据通信
I. Overview of VPN In recent years, with the wide application of the Internet, how to use the resources of the Internet to set up an enterprise virtual private network (VPN) has become a new hot spot in the IT industry. Many ISPs have provided or are planning to offer value-added VPN services. VPN refers to relying on Internet service providers ISP) and other network service providers NSP) in the public network to establish a dedicated data communication