The Windows analogue to SSH is Terminal Service.
There are other remote desktop thingys (PcAnywhere, VNC, etc), but they suck in comparison, being slow and flaky. TS is snappy and on a LAN it almost feels like a local computer.
The most annoying thing with TS is that there is no built in way to copy files. I think that's fixed in later versions, but if you're accessing a w2k machine, it's tough if you can't map a network drive because of firewall restrictions.