L2TP

• Developed by IETF

  • Combines PPTP and L2F

• Uses PPP for encapsulation, authentication, compression, & management

• Uses IPsec for encryption

L2TP Protocol Stack

Application Layer

IP, IPX, DDP, etc.

PPP

GRE

IPsec ESP

IP

PPP

Winsock

NDIS/ODI

Winsock

NDIS/ODI

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