Dell Intel PRO Family of Adapters - Manual (Page 34)

NOTE: Not all systems support every wake setting. There may be BIOS or operating system settings that need to
be enabled for your system to wake up. In particular, this is true for Wake from S5 (also referred to as Wake from
power off).
Wake on Magic Packet
In early implementations of Remote Wake-up, the computer could be started from a power-off state by sending a Magic
Packet. A Magic Packet is an Ethernet packet that contains an adapter's MAC address repeated 16 times in the data
field. When an adapter receives a Magic Packet containing its own MAC address, it activates the computer's power.
This enables network administrators to perform off-hours maintenance at remote locations without sending a technician
out.
This early implementation did not require an OS that was aware of remote wake-up. However, it did require a computer
that was equipped with a standby power supply and had the necessary circuitry to allow the remote power control.
These computers were typically equipped with a feature named Advanced Power Management (APM). APM provided
BIOS-based power control.
APM Power States
Power State Description
Ready On and fully operational
Stand-by CPU is idle, and no device activity has occurred recently