Router is device that can connect two or more different computer networks. Some router vendors is in the market are : cisco, 3Com and others. In addition to costum-made Router by Vendors-vendors there are also PC router is a PC (Personal Computer) that functions as a another network. Basically the router is a device that works on a computer network in the network layer of the OSI (Open Systems Interconnection).

router routing table on which there are tables.

example of a router on the network structure :