Are you an ex-UNIX person who's been migrated to Windows 2000, and miss the ability to open a terminal window and connect to computers? No money for a Terminal Server licence? Fear not, Windows 2000 Professional comes with a Telnet Server.
To start it, go to Settings-Control Panel-Administrative Tools, and click on Telnet Server Administration. Fittingly, the admin program for the telnet server is text-mode only. You can start and stop the service, decide whether to use NTLM authentication or just passwords, list the number of users (a maximum of five, unless you add the Services for UNIX), and remove users.
Some character-mode applications will run under Windows 2000's telnet server, and you can do the usual file manipulation things. If you were hoping for a fully-fledged telnet server as per UNIX, you'll be disappointed. Terminal emulation is poor and limited to a single setting. The Windows 2000 telnet client works fairly well with the server, but the UNIX ones I tried were less successful. Telnet also means sending data in clear text over the network, so be careful.