Power over Ethernet (PoE) is not rocket science, but it’s not plug-and-play magic either. This short primer walks through the basics with a few practical nudges for those curious to try it out. It’s a technology that delivers electrical power alongside data over standard twisted-pair Ethernet cables. It enables a single RJ45 cable to supply both network connectivity and power to powered devices (PDs) such as wireless access points, IP cameras, and VoIP phones, eliminating the need for separate p...