VPN(Virtual Private Network) 又称为
虚拟专网服务,它是利用公共网络资源为客户构成专用网的一种业务。可以被当做专网那样使用和管理。拥有同专有网络一样的安全性和可管理性。成本大大低于自建专网的情形。公共网络提供了高的扩展性和灵活性。从技术实现角度来看,也就是MPLS-VPN,即采用多协议标记交换(MPLS)技术在公共IP网络上构建企业IP专网,实现数据、语音、图像多业务宽带连接。
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