CompTIA Network+

Answer: D - Power over Ethernet or PoE technology describes a system to transfer electrical power and data to remote devices over standard twisted-pair cable in an Ethernet network at a power range of 25.5 W.

Key Takeaway: Power over Ethernet (PoE) is used for wired Ethernet LANs. PoE allows the electrical current necessary for the operation of each device to be carried by the data cables along with the data itself. This minimizes the number of wires that must be strung in order to install the network. The result is , easier maintenance, and greater installation flexibility than with traditional wiring.