Power over Ethernet (PoE) is a technology that enables electrical power and data to be transmitted over a single Ethernet cable. It allows compatible devices, such as IP cameras, wireless access points, and VoIP phones, to receive power and data through the same cable, eliminating the need for a separate power source.

PoE works by injecting power into the Ethernet data stream at the source, such as a PoE-enabled switch, and then extracting the power at the receiving end using a PoE-compatible device. The power is carried over unused pairs of wires in the Ethernet cable, which means that the data signal is not affected.

This technology simplifies the installation and deployment of network devices, as it eliminates the need for separate power cables and outlets. It also makes it possible to install devices in locations where it may be difficult or impossible to run a power outlet.

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