When the device shuts down, the network interface card (NIC) is still receiving power, and listening on the network for a magic packet to arrive. You must also identify the IP address and MAC address of the remote device. To accomplish this you will first need to ensure your PC is configured to accept a Wake-on-LAN remote command. If Wake-on-LAN has been enabled in the BIOS settings, the system powers on as if the power button had been pressed. When the remote network adapter hears a magic packet created for the unique MAC address of the device, the network adapter alerts the computer to power on. This is accomplished by the generation of a "magic packet" to remotely power on PCs attached to networks.
With the Wake-on-LAN utility you can power on a PC remotely.
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