What is the primary purpose of Power over Ethernet (PoE)?

The primary purpose of Power over Ethernet (PoE) is to provide power to connected devices over standard Ethernet cables. This technology allows devices, such as IP cameras, VoIP phones, and wireless access points, to receive both data and power through a single network cable, simplifying installation and reducing the need for additional power outlets.

By using PoE, installers can place devices in locations that may not have convenient power sources, making it a flexible solution for powering equipment in various environments. This capability is especially beneficial in settings where power availability is limited or where extensive electrical wiring would be costly.

The other options pertain to functionalities that are not the primary focus of PoE. While they address aspects of audio, video, or network performance, they do not relate to the provision of power, which is the fundamental feature that distinguishes PoE.