In computing and computer networks, a switch is the analog device which enables interconnected networks operating at layer 2 or Open Systems Interconnection or OSI model data link layer. A switch connects two or more parts of a network, functioning as a bridge that transmits data from one segment to another. Its use is very common when there is the purpose of connecting multiple networks together so that they work as one. A switch often improves the performance and safety of a local area network.
The operation of a switch or switch takes place because it has the ability to learn and store network addresses of devices reachable through their ports. Unlike what happens with a hub or concentrator, the switch makes information directed to a device to go from a source port to destination port.
The types of switches are multiple. For example, the store-and-forward, which stores data in a buffer packets before sending it to the outlet port. While it ensures data without error and increases the confidence of network, this type of switch requires more time for packet data. The cut-through seeks to reduce the delay of the previous model, since it reads only the first 6 bytes of data, and then routes it to the outlet port. Another type is the Adaptive cut-through, that support operations of the two previous models. The layer 2 switches, to quote another eemplo, is the more traditional case that works as a multiport bridge. The layer 3 switches that incorporates features of router. And most recently he joined the market the layer 4 switches.
Switches or switches are widely used in all networks, to small and large scale.
Article contributed by the team of collaborators.