Power and data can be delivered simultaneously over Ethernet connections, thanks to a ground-breaking technology called Power over Ethernet (PoE). This approach greatly lowers expenses while streamlining network equipment installation and cabling. At the moment, IEEE 802.3af (PoE), IEEE 802.3at (PoE+), and IEEE 802.3bt (PoE++) are the three primary power supply specifications for PoE. Each standard represents a different set of application scenarios and power supply capabilities.