VPN虚拟专网是近年来随着Internet的广泛应用而迅速发展起来的一种新技术,用以在公共网络上构建私人专用网络。虚拟专网可以帮助远程用户之间建立可信的安全连接,并保证数据的安全传输。对于采用IP Sec安全协议方式构建虚拟专用商网的方法进行了说明,提出了QoS将是VPN需要持续研究的方向。%VPN is a new technology with the widespread application of internet to build private network on the public network.VPN can build secure connection for remote users,and ensure the security of data transmission.This paper explanies the method of using IP Sec security protocol to build VPN,and proposes a research direction of QoS in VPN.
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