Virtual Private Networks 虚拟私用网络 ; 虚拟私人网络

Virtual Private Dialup Networks 虚拟私有拨号网 ; 虚拟私有拨号网络

VPN Virtual Private Networks 虚拟专用网

VPNs Virtual private networks 虚拟专用网

Virtual Private Networks Identifier 虚拟专用网标识符

Provider-Provisioned Virtual Private Networks 运营商提供的虚拟专用网

Global Virtual Private Networks 全球虚拟专网

IP security virtual private networks IP安全虚拟私有网路