Not every Ethernet is Power Over Ethernet. PoE is a technology that sends data and power at the same time through Ethernet cables. However, it is not used in all Ethernet networks.
Definition and application scenarios of PoE
PoE technology allows power and data signals to be provided simultaneously in a single cable. It is commonly used in devices that need remote power. This includes IP phones, wireless access points, and network cameras.
The advantages of PoE technology are its convenience and cost-effectiveness. This can save a lot of cable and power socket costs, and realize plug-and-play of devices.

The difference between PoE and other Ethernets
Not all Ethernets support PoE function. Traditional Ethernet is only used for data transmission, while PoE
Ethernet provides power while transmitting data. Whether the PoE function is supported depends on the hardware support of the network device.
Development and application status of PoE standards
PoE technology standards are defined by IEEE 802.3af and IEEE 802.3at. The lEEE 802.3af standard allows a maximum power supply of 15.4W. The IEEE 802.3at standard allows up to 30W. These standards ensure the interoperability of PoE devices and the stability of power delivery.