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Magic Packet
I'm not sure, but it seems that the name comes from AMD. I did not do a search but Jos� Pedro Oliveira (second link above) says that there is more documentation about the protocol in their web site. As I mentioned above, you need to send a special packet in your LAN network, so that the remote computer will receive it and wake up. This so-called Magic packet consists of the following parts:

1.6 Bytes Header which is nothing but 6 bytes of 0xff.
2.16*6 Bytes Data. To produce data you'll need to repeat remote computers MAC (Media Access Control) Address 16 times. Look at the below figure:
 

Magic Packet(With Secure On Password)
(This part added on an update on: 2005/09/03. Note that 'PowerOn' sample has been updated in all downloads either. [as well as executables!])

Some clients require a password in the packet to be turned on, otherwise they simply won't! This password is also known as SecureOn, and will be attached at the end of the packet. In this case, a packet will look something like this:

 

So we have six cells, each capable of saving an integer number between 0 and 255(Just like MAC bytes).

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