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Layer 2 Tunneling Protocol
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Network Layer — Security & VPN
Protocol Overview
Full Name
Layer 2 Tunneling Protocol
Abbreviation
L2TP
OSI Layer
Network Layer
Category
Security & VPN
Default Port
1701
RFC
RFC 3931
About L2TP
Tunneling protocol combining features of PPTP and L2F. Often paired with IPsec for encryption in enterprise VPN deployments.
Network Layer
Security & VPN
Port 1701
Standards Reference
L2TP is defined in RFC 3931, published by the Internet Engineering Task Force (IETF). RFCs are the official standards documents for internet protocols and are freely available for public review.