## Chapter 9 Summary

Windows NT and UNIX support many of the same remote-access protocols, media types, and security features, including PPP, SLIP, X.25, POTS, ISDN, serial, and VPN with PPTP. The table below summarizes the remote access compatibility between the Windows NT and UNIX.

Feature | Windows NT | UNIX
Method of implementation | Dial-up networking (built-in) | Additional hardware (Add-ons), Cisco, Ascend, 3COM/USR, Bay, Shiva
Supported protocols | PPP, SLIP, X.25 | PPP, SLIP, X.25
Supported media | POTS, ISDN, serial | POTS, ISDN, serial
Security technology | VPN with PPTP (L2F in NT 5.0), third-party SKIP | VPN with PPTP, L2F, SKIP
Supported authentication schemes and servers | PAP, SPAP, CHAP, MS-CHAP, third-party security devices, RADIUS, TACACAS+ | PAP, CHAP, third-party (Secure ID), RADIUS, TACACS+
Routing protocols | RIP, OSPF (with RAS and routing) | RIP (many others, depending on version)

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Last Updated: December 1, 1997