IT runs on windows servers (go into control panel in nt/2k under admin tools i think) its basicly "command prompt over the web" is the simplest way to explain it...now adays though its unsecure go with ssh..(theres no built in ssh win server but you can dl them).
telnet is on unix/linux too.
telnetd is the daemon the unix server runs, then you use the telnet client (from windows or unix) to connect to the server.
Basically like ssh, it gives you a comand prompt at a server after you successfully login, but more insecure as interactive said.
Wow quick replies, thanks muchley The reason I asked the question was because I was told telnet can solve this problem: I would like to ftp a large zipped file to my site then unzip it once the upload was complete, would telnet be suitable for this and would my host allow me to do this. Who would install unzip on the server, me or my host? Thanks again.
Ah, I dont know then, hehe, search for telnet.exe on your machine at home, open it, connect to the host and enter your login/pass, then try unzip file.zip
not sure really, im not a windows guru, sorry