An ordinary switch, also known as an unmanaged switch, is a basic networking device that connects devices within a network. It is typically used to connect computers, printers, and other devices in a small office or home network. An ordinary switch simply forwards data packets to their intended destination and does not require any configuration or management.
On the other hand, a Power over Ethernet (PoE) switch is a type of switch that provides power and data to network devices over a single Ethernet cable. PoE switches are designed to support devices such as IP phones, wireless access points, and security cameras that require both power and data connectivity.
The main difference between an ordinary switch and a PoE switch is that the latter can provide power to connected devices, while the former cannot. PoE switches typically support one or more of the PoE standards (802.3af, 802.3at, and 802.3bt), which determine the maximum power output that the switch can provide to connected devices.
In summary, while ordinary switches are used to connect devices within a network, PoE switches provide both power and data connectivity, making them a more efficient option for supporting PoE-enabled devices.