Routers are devices specialized in the management (trasowaniu) packets of data traffic between the different networks or subnets. It is thanks to him, the network business - kolokwialnie words - "knows" to which the computer and what route is to transfer data sent by the user. So unless you do not have to explain, as a very important element of any network is a router.

To carry out its functions, the so-called use. routing tables, containing information on local area networks and other routers (if they are connected). With a router table read address of the device, which has hit a concrete package of data and the fastest route, which he has overcome.

The router takes the form of a separate device, or wolnostojącego installed in the closet rack, but due to a greater degree of sophistication in the normally serwerowniach uses this second type. Very often the router is equipped with additional features - most often supplemented by a firewall, such a device not only directs but also controls traffic within the network.