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The concept of switch born in a term of English origin and can be translated into Spanish as switch , switch , rod or whip , according to each context. The word can also take the form of a verb and refer to the act of shake or change .

In the Castilian language, the notion of switch is used to mention the digital features device what is needed to interconnect networks from computers . The switch operates at the level of data crossing or combination and its main purpose is to ensure the interconnection of a minimum of two network segments, similar to the function of a bridge (bridge ).

This network device is responsible for transmitting data from one segment to another according to the MAC address whose destinies are the frames of this structure. His task focuses on the connection of different networks and their corresponding mergers. The switch, by its utility, acts as a filter and optimizes the performance of local area networks (known as LAN by Local Area Network ).

The switches have the ability to keep the mentioned MAC addresses of the equipment that can be reached from each of their ports . In this way, the information travels directly from the source port to the destination port (as opposed to what happens with hubs).

Currently in the market we have the opportunity to find a wide variety of switches and that is that it responds to the different needs that, for reasons of their professional field or for personal reasons, users may have. In this sense, for example, it should be noted that devices of this type with 4, 8, 16, 24 and 48 ports can be purchased.

When two switches are connected, each stores the MAC addresses of the devices accessible from their ports. This means that, on the interconnect port, the MAC addresses of the devices of the other switch are hosted.

When talking about the operation of any switch it is important that we highlight several of the operations that are carried out from them and other equally relevant elements. Thus, for example, there would be what is known as encapsulation that can be defined as that process by which the data that is to be sent through the network is subjected to a task of placing in packages, which can be both managed and tracked at any time that is necessary.

In the same way, the segmentation task must not be overlooked either. This should be noted that it consists of dividing a network into several segments for several fundamental reasons among which is to obtain a greater bandwidth for each user.

However, another important reason to proceed with the aforementioned segmentation is that thanks to it and the work of the switch, it prevents traffic congestion or collisions that would logically lead to the said bandwidth not existing or will limit

The switches are classified according to the addressing system of each frame involved. Store-and-Forward , Cut-through , Adaptive Cut-Through , Layer 2 Switches , Layer 3 Switches and Layer 4 Switches They are some of the types of switches.

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