There are different types of PoE switches, including PoE (IEEE 802. 3af), which supplies up to 15. A network switch is a hardware device that connects devices ("network clients") on a local area computer network. It makes it possible for printers, PCs, wireless access points, and other network-capable devices to connect with one another. A PoE switch provides power and network connectivity over Ethernet cables to access. PoE, or Power over Ethernet, was a technology developed by Cisco in the year 2000 for connecting their IP Phones. Though, later, this technology was recognized and had a few iterations. This was also known as Type 1 PoE. These devices can deliver data and electrical power to connected devices through Ethernet cables.