If you have wake on lan enabled or available on your nic, yuppers... not a problem.
"To use Wake on LAN technology you need a Wake on LAN network adapter, Wake on LAN enabled motherboard, and remote management software."
We don't use it because it sometimes plays games on you switch (port disabling) but that's easily fixed, now we are too lazy to go to 400 pc's to turn it on another 400 off site... eep! I sometimes use it on my main workstation if I am on vacation. (or I just leave the thing on all the time)