L2TP

Short for Layer 2 Tunneling Protocol, L2TP is a tunneling, Session Layer protocol, using the UDP (user datagram protocol) port 1701 on a VPN (virtual private network). It does not include any encryption and relies on other methods to provide data security and privacy, such as IPsec.

L2TP is used as a tunneling mechanism to resell ADSL (asymmetric digital subscriber line) connectivity by cable providers and companies providing a connection to their employees from outside the office.

Computer abbreviations, Network terms, Protocol