Yes, all Ethernet switches require electrical power to operate. Here's why: Active Electronics: Switches contain chips, processors, buffer memory, and power circuits that process and forward data. Sitting at the top of the hierarchical model, core switches interconnect distribution layer switches and provide high-speed data transfer across. Power over Ethernet (PoE) is the transmission of Power from a Switch to a device that requires power, via Ethernet. This device could be an IP Camera, a Wi-Fi Access point, or something specific to your industry. For these devices to operate, they need to be PoE compliant and connected to a device. A core switch in networking serves as the high-capacity backbone, italic centralizing data flow and ensuring efficient communication between different network segments.