Wake On LAN

Introduction

Wake on LAN (WOL), or sometime they called Remote Wake Up, is an Ethernet computer networking standard that allows you to turn-on a power-off computer or wake-up a sleeping or hibernating computer from another location over a network connection. WOL works by sending a signal over a local area network (LAN) or a wide area network (WAN), such as the Internet, to trigger power-up of a computer on a private LAN.

Purposes

To save electric energy, most people don't want their computers to stay on all the time.