当前虚拟专用网络主要应用的范围是企业部门与分部门之间，通过虚拟专用网络技术实现了对各个企业分部 的远程操作，并且加强了信息安全的水平，实现了远程员工在企业网之间的访问。由于虚拟专用网络技术协议的不同，服务类 型以及客户需求不同，一般分为两大类型，本文将对这两种类型的虚拟专用网络技术在网络信息安全中的应用展开详细探讨。

Virtual Private Network (VPN) is mainly applied in departments and sub-departments of enterprises, realizing remote operation among different divisions, strengthening the level of information security, as well as enabling employees to get remote access to enterprise network. Due to different VPN protocols, service types and customer demands, there are generally two types of VPN. This paper provides a detailed discussion on the application of these two types of VPN technology in network information security