Meaning and Definition of Switch

Definition of switch

A switch is a device for the interconnection of networks of computers or other devices.
Also known as 'switch', the switch is a device that connects two or more segments of a network for data, functioning as a bridge link. It is said that in a "red star", the switch is the Center.
The functionality of a switch is given by multiplication of networks and data to be transmitted, with the subsequent need for an order and systematization for operation. A switch acts as a filter on the network, improving the performance and security of the connections causing a fusion of these.
A switch is commonly used in a telephone network, for example, in a company, allowing all personal phones are connected among themselves for the implementation of internal calls and for the transmission of external calls. But are also used with much more complexity switches in a computer network, connecting ports with each others and networks related to one another.
Bridges or switches can be connected to each other in turn, but a unique path can only exist between two points on the network. Otherwise, a "loop" can occur in the network and data transmission is altered, creating an infinite spiral. Thus, "floods" occur in the network, as a result of which the communications fail.
Switches can be classified into "store-and-forward" (which store each set of data in a buffer before relaying it), the "cut through" (minimize the delay of the first, reducing the storage time), the "Adaptive-cut-through" (support processes of the two above types), the "layer 2 switches" (functioning as multi-port) and other.
Switches use is widespread today, and while they used in complex computing processes, for example, for the administration of huge corporate data networks, can also be used in small businesses or projects that require ongoing communication of its members.