what is poe in networking

Power over Ethernet (PoE) is a technology that enables the electrical current necessary for operating each device to be carried by Ethernet data cables instead of standard electrical power cords and wiring. PoE allows Ethernet cables to transmit data and power simultaneously using a single network cable. It is used to implement wired Ethernet local area networks (LANs) and is designed to eliminate the need for separate power supplies and outlets. PoE technology relies on the IEEE 802.3af, 802.3at, and 802.3bt standards set by the Institute of Electrical and Electronics Engineers and governs how networking equipment should operate to promote interoperability between devices. PoE can transport both power and data over Ethernet cable, which means less wiring is necessary, and electrical wiring can remain intact. The advantages of PoE include ease of installation, cost savings, safety, and data speed. PoE is commonly used in smart home applications and business premises, and it can power devices such as wireless access points, IP cameras, VoIP phones, and LED lighting.