Power over Ethernet (PoE) is a technology that allows electrical power to be transmitted alongside data over standard Ethernet cables. Here's a breakdown of key aspects of PoE: PoE eliminates the need for separate power cables, simplifying the installation and deployment of networked devices such as IoT devices. 

Compatibility: PoE standards are backward compatible, meaning that PoE+ devices can be powered by PoE switches, but they will only receive up to the maximum power supported by the PoE standard. 

Advantages: Simplified Installation: Eliminates the need for separate power cables, reducing installation time and cost. 

Flexibility: Allows for the deployment of networked devices in locations where AC power outlets are not readily available. Centralized Power 

Overall, PoE technology offers a convenient and cost-effective solution for powering networked devices, providing flexibility, scalability, and simplified installation in various applications.