Switches are networking devices that operate at the OSI model's layer 2 or data link layer. They establish connections between networked devices and employ packet switching to transmit, receive, or forward data packets or frames over the network.
There are numerous ports on a switch where computers can be connected. A network switch evaluates the destination address of each data frame that enters one of its ports, runs any necessary checks, and then sends the frame to the appropriate device (s). It enables broadcast, multicast, and unicast communications.
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