From Latin challenge, the term net is used to define a structure which has a characteristic pattern . There are multiple types of network, such as computer network , the power grid and the social network .
The computer network name the set of computers and others interconnected equipment , which share information, resources and services. It can in turn be divided into various categories, according to its scope (local area network or LAN , metropolitan area network or MAN , wide area network or WAN , etc.), your connection method (by coaxial cable, fiber optic, radio, microwave, infrared) or its functional relationship (client-server, person to person), among others.
The power grid , on the other hand, is the one formed by Electric generators , transformers , lines of transmission and distribution lines , which are responsible for bringing electricity to residential users. The system uses different voltages, where the highest are used over the longest distances, while the voltages are reduced as the energy gets closer to the user's facilities.
Refering to social network , the concept refers to that structure where different individuals maintain different types of relationships (friendly, commercial, sexual, etc.).
The social network has updated its meaning in recent years, since the term began to be used to define the sites of Internet that promote virtual communities according to interests. MySpace and Facebook They are two of these social networks that bring together millions of users, who can exchange messages and files with other members of the network.