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L2TP
Last modified: Wednesday, February 25, 2004 

Short for Layer Two (2) Tunneling Protocol, an extension to the PPP protocol that enables ISPs to operate Virtual Private Networks (VPNs). L2TP merges the best features of two other tunneling protocols: PPTP from Microsoft and L2F from Cisco Systems. Like PPTP, L2TP requires that the ISP's routers support the protocol.

Related Categories

Internet Access

Internet Protocols
Related Terms

dial-up access

DLSw

IPsec

Layer Two Forwarding

PPTP

tunneling

VPN
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RFC 2661
Full text of the L2TP RFC.




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