Windows 2000 Server includes terminal services for the purpose of remote administration of servers as well as the ability to provide centralized access to software and the Windows 2000 desktop. Not installed by default, terminal services provides an environment that is often referred to as‘thin client’. In this environment (also provided by third-party products such as Citrix Metaframe), only screen-shots, keyboard strokes,and mouse movements are passed between the server and the client. All processing actually takes place on the server, which greatly reduces the computing requirements on the client side. Assuch, even Intel 386 running Windows 3.11 can provide users with access to the Windows 2000environment and associated applications. Terminal services uses the Remote Desktop Protocol (RDP) to pass data between the terminal service client and server.
Terminal services is installed via the Windows Components Wizard. After choosing to install terminal services, you will be prompted to choose between the two possible install modes.
Remote administration mode allows 2 simultaneous terminal services connections for the purpose of remote administration and requires no additional licensing. Application server mode is provided for the purpose of allowing regular users to run applications in Windows 2000. In this mode, a terminal services licensing server much also exist(a 90-day grace period is provided), since every terminal client connection will require a terminal service CAL. Note that Windows 2000 Professional systems do not require an additional CAL to access the terminal server, but other operating systems do.