Power over Ethernet (PoE) technology allows a twisted-pair Ethernet cable to provide power to electric devices, in addition to data. This is most commonly found in Internet of Things (IoT) devices, like IP security cameras, and greatly simplifies the wiring of any such setup, as it means only one cable is necessary for almost everything. When such devices can be placed in hard-to-reach locations, where running any cabling is cumbersome, it is really handy, not to mention cheaper.
That’s not everything that makes PoE so useful, though. Here’s everything you need to know about Power over Ethernet.
Dispatches From The Front 