Wake-on-LAN
Definition
A networking protocol that allows a computer to be powered on remotely by sending a special "magic packet" to its NIC.
Context & Usage
Wake-on-LAN is enabled in BIOS, requires NIC support and a powered-on switch. The "magic packet" contains the target MAC address repeated 16 times. Used for after-hours administrative tasks, power management, and remote-only server fleets. Modern servers also support WoL via iDRAC/iLO/BMC remote power control, which is more secure.
Examples
- etherwake utility on Linux
- PowerShell wake-on-lan tools
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