Router

A router is a computer networking device that forwards data packets across an internetwork toward their destinations, through a process known as routing. Routing occurs at layer 3 (the Network layer) of the OSI seven-layer model.

In order to route packets, a router communicates with other routers using routing protocols and using this information creates and maintains a routing table. The routing table stores the best routes to certain network destinations, the "routing metrics" associated with those routes, and the path to the next hop router. See the routing article for a more detailed discussion of how this works.

Full definition of AGP at Wikipedia

A router is a piece of networking hardware that enables security by providing your internal LAN with an IP address and allows PCs to share Internet access often through either wired connections or wirelessly. Routers are highly recommended because they are considered hardware firewalls and provide extra security for your LAN.

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