Wikipedia
A network switch (also called switching hub, bridging hub, officially MAC bridge) is networking hardware that connects devices on a computer network by using packet switching to receive, and forward data to the destination device.
A network switch is a multiport network bridge that uses media access control addresses to forward data at the data link layer (layer 2) of the OSI model. Some switches can also forward data at the network layer (layer 3) by …
Network switch - Wikipedia, the free encyclopedia