Wake On LAN / Remote Wake Up - Computer

The general process of waking a computer up remotely in a LAN can be explained thus:

The target computer is shut down, with power reserved for the network card. The network card listens for a specific packet, called the “Magic Packet”. The Magic Packet is broadcast on the broadcast address for that particular subnet or the entire LAN. The listening computer receives this packet, checks it for the correct information, and then boots if the Magic Packet is valid.