what does a network switch do?

A network switch is a hardware device that channels incoming data from multiple input ports to a specific output port that will take it to its intended destination. It is a small device that forwards data packets between multiple network devices, such as computers, routers, servers or other switches.


In a local area network what does a network switch do? that uses Ethernet, a network switch determines where to send each incoming message box by looking at the address of the physical device (also known as the media access control address or MAC address) . The switches maintain tables that correspond to each MAC address on the port where the MAC address is received.

A network switch operates in the network layer, called layer 2 of the OSI model.

Network device layers
Network devices can be separated from the level at which they operate, defined by the OSI model. The OSI model conceptualizes the networks that separate the protocols by levels. Control generally passes from one level to another. Some levels include

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