VPN通过一个私有的通道来创建一个安全的私有连接，将远程用户、公司分支机构、公司的业务伙伴等跟企业网连接起来，形成一个扩展的公司企业网(VPN creates a secure private connection through a private channel, connecting the remote user, the company branch, and the business partner of the company with the enterprise network

利用相应的信息技术以及互联网技术来协调企业与顾客间在销售、营销和服务上的交互(In order to improve the core competitiveness, the company uses the corresponding information technology and Internet technology to coordinate.)