Question

翻译，求英语界大神帮忙！！~周六上课要用，谢谢了！！~翻译的好一定会追加！！

虚拟专用网络是一种利用公众网络构建的私有专用网络，它可不受地理位置限制，将整个公众网视为自己的专用网。目前，能够用于构建VPN的公众网络包括Internet和服务提供商所提供的DDN专线、帧中继、ATM等。构建在这些公共网络上的VPN将给企业提供集安全性、可靠性和可管理性于一身的私有专用网络。“虚拟”的概念是相对传统私有专用网络的构建方式而言的。对于广域网连接，传统的组网方式是通过远程拨号和专线连接来实现的，而VPN是利用服务商所提供的公共网络来实现远程的广域连接。

Answer 1

Virtual private network is a private dedicated networks which is built by using public network 。 it has no geographical restrictions,and regard the entire public network as its own private network. At present, those public network which can be used to build VPN public networks including the Internet and DDN line provided by service provider. frame relay, ATM, etc. the VPN based on these public networks will provide enterprises a private dedicated network with a set of security, reliability and manageability . "Virtual" concept is relative to the traditional way of construction of private dedicated networks. For wide area network connections, traditional networking is achieved through remote dial-up and dedicated connections, while ,the VPN is using a public network which is provided by services to realize wide area connections.
亲，望采纳啊，我自己翻译的，质量保证

Answer 2

请看精准手工翻译：
Virtual private network is a kind of special private network using public network construction , which can't be limited by geographical position, taking the whole public network as their own private network. At present, those public network which can construct the VPN include the Internet and the DDN service provided by the Internet service provider, frame relay, ATM, etc. These VPN constructed on the public network will provide security, reliability and manageability in the private special network. "Virtual" is the concept relative to traditional private special network construction. For the WAN connection, the traditional network mode is realized through the remote dialing, and special line connection, however VPN service realizes the remote wide-area connection through the public network provided by service provider .