a private data communications network built on public switching and transport facilities rather than dedicated leased facilities such as T1s.
virtual private dial-up network. Also known as virtual private dial network. A VPDN is a network that extends remote access to a private network using a shared infrastructure. VPDNs use Layer 2 tunnel technologies (L2F, L2TP, and PPTP) to extend the Layer 2 and higher parts of the network connection from a remote user across an ISP network to a private network. VPDNs are a cost effective method of establishing a long distance, point-to-point connection between remote dial users and a private network
virtual private dial-up network. Enables IP traffic to travel securely between a remote client, such as a Windows 2000 laptop, over a public TCP/IP network by encrypting all traffic from one network to another. A VPDN uses L2TP "tunneling" to encrypt all information at the IP level.
virtual private dialup network. A type of access VPN that uses PPP to interface with the subscriber. VPDN enables the service provider to configure VPNs across an IP access network that connects to the VRFs on a PE. VPDN uses the Layer 2 Tunnel Protocol (L2TP) to extend or "tunnel" a PPP session across the IP access network.
Virtual Private Dial-Up Networking. A system that permits dial-in networks to exist remotely to home networks, while giving the appearance of being directly connected. VPDNs use L2TP and L2F to terminate the Layer 2 and higher parts of the network connection at the home gateway, instead of the NAS.