Router is a device of limitless potential and exceptional functions that enabled it to become one of the most popular network accessories. The greatest power of a router is universality which is one of the most valued of the functions of a router. One router at home or in an office is most cases enough to provide stable Internet connection. The amount of computers connected not stated but it is reasonable to keep in mind that the more computers use network at the same time, the slower the connection is. As computers maintain a connection within their own exclusive network they in fact share information. In high-tech terms we could say that routers shift data.