Routing and Routers
When you send a packet from one computer to another computer, it first determines whether the packet is sent locally to another computer on the same LAN or to router so that it can be routed to the destination LAN. If the packet is meant to go to a computer on another LAN, it is sent to the router (or gateway). The router then determines the best route to take and forwards the packets to that route. The packet then goes to the next router and the entire process repeats itself until it gets to the destination LAN. The destination router then forwards the packets to the destination computer.
To determine the best route, the routes use complex routing algorithms, which take into account a variety of factors, including ...
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