Creating a VPN server with Windows NT 4.0 is simple, but your choices are limited. The OS offers few administrative options, and PPTP is the only VPN protocol available. Windows 2000 brings improved reliability, scalability, and manageability—and support for two VPN protocols. In addition to PPTP, Win2K supports the Layer 2 Tunneling Protocol (L2TP). When choosing which protocol to use to set up your server, you should understand...