network computers

hi all, is it possible for one in a domain network to see which computers were left on, even if you
don't know the device name or ip?  this would be to manage some pc's after hours... or is there a start-up command which one can sent via the network cable... I'm not sure if wake on LAN should be enabled for this
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Have you looked into Spiceworks?

Wake on LAN would need to be enabled on the PC's if you want to be able to turn them on for updates, etc.

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SchoemansAuthor Commented:
That's what I thought of, also thought there was another way but thanx a mill
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Windows Server 2008

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