PPTP

• Developed by PPTP Forum

  • Ascend, ECI, Microsoft, & 3Com

• Uses PPP and GRE to route over the Internet

PPTP Protocol Stack

Application Layer

TCP-UDP/IP, IPX, DDP, etc.

PPP

GRE

IP

PPP

• PPTP offers encapsulation (GRE), authentication (CHAP), encryption (PPP), compression (PPP), and management

Winsock

NDIS/ODI

Winsock

NDIS/ODI

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