Examples include virtual private networks (VPNs) and networks configured to a private domain.

示例包括虚拟专用网络(virtual private net work, VPN)和配置到专用域的网络。

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To differentiate virtual private networks (VPNs), the Mac address of the first router the client connects to is used as a distinguishing factor.

为区分虚拟专用网(VPN)，将使用客户机第一次连接的第一个路由器的Mac地址来作为区分因素。

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The inclusion of support for IPv6-to-IPv6 tunneling allows secure seamless communication to occur between two endpoints, such as transmissions over Virtual Private Networks, or VPNs.

所包含的对 IPv6 到 IPv6 隧道的支持让两个端点之间可以进行安全无缝的通信，比如虚拟专用网络 (Virtual Private Networks, VPN) 之上的传输。

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Cisco provides network security products such as virtual private networks (VPNs) and firewalls.

FORBES: Cisco Should Be $25 But No Thanks To Network Security Business

Cisco offers security products like firewall, intrusion prevention, remote access and virtual private networks (VPNs), unified client, web, and email security.

FORBES: Network Security Just One Brick In Cisco's Road To $24

For years they have largely turned a blind eye to paid-for services, such as WiTopia's, which provide virtual private networks (VPNs) enabling encrypted connections to the many websites blocked by the firewall.

ECONOMIST: Authorities with the jitters