L2TP Hear it!

L2TP (Layer 2 Tunneling Protocol) Telecom Definition
A tunneling protocol used for secure node-to-node communications by Internet service providers (ISPs) and other virtual private network (VPN) service providers in support of multiple, simultaneous tunnels in the network core. End users gain access to the service provider on an unencrypted basis, with the service provider assuming the responsibility for encryption at the edge of the packet network. L2TP is an extension to the Point-to-Point Protocol (PPP) that evolved from a combination of Microsoft's PPTP and Cisco's Layer 2 Forwarding (L2F) protocol. L2TP is described in IETF RFC 2661. See also encryption, ISP, PPP, PPTP, protocol, tunneling, and VPN.

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