Power over Ethernet or PoE, is a network feature that allows electrical power to travel through an existing data connection with an ethernet cable, delivering DC power to Powered and IP-enabled devices. Doing so minimizes the number of cables that must be strung in order to install the network.
This has revolutionized the way modern networking infrastructures operate. PoE provides a convenient and cost-effective approach to deliver both power and data connectivity over a single connection.