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Network Security First-Step, Second Edition by Donald Stoddard, Thomas M. Thomas

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Point-to-Point Tunneling Protocol (PPTP)

This section discusses the Point-to-Point Tunneling Protocol (PPTP), which was developed by Ascend Communications, Microsoft Corporation, 3Com/Primary Access, ECI Telematics, and U.S. Robotics.

PPTP operates at Layer 2 of the OSI reference model and is based on the Point-to-Point Protocol (PPP) standard for dial-up networking that enables any user with a PPP client to use an Internet service provider (ISP) to connect to the Internet. PPTP builds on the functionality of PPP, which is used for broadband access to commercial networks, by enabling users to securely connect via a VPN (covered in Chapter 8, “Router Security”) to secure networks such as that of their employers or business partners.

PPTP is a ...

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