The different kinds of Wake-on-Lan

Some time ago I posted about wake on lan being hidden by a cryptic energy BIOS option. This week I was setting up a new test system and wondered what exactly the Linux ethtool:
Supports Wake-on: pumbg
letters actually meant. The man-page is help and it actually is quite simple and logical:

p Wake on PHY activity
u Wake on unicast messages
m Wake on multicast messages
b Wake on broadcast messages
a Wake on ARP
g Wake on MagicPackettm
s Enable SecureOntm password for MagicPackettm
d Disable (wake on nothing). This option clears all previous options.

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