A router provides mechanisms for interconnecting networks of different structures

which makes the transfer of packets among networks a reality. Routes are

information about the path that guides the forwarding of packets.

 

In the internet, routes are decided by routers. A router chooses an appropriate

route according to the destination address in the header of the packet and sends the

packet to the next router. The last router on the route is responsible for delivering the

packet to the destination host. The whole process is very similar to a relay race. Each

router focuses only on finding an optimal route and forward packets to the next

station along that route. In this way, packets are delivered from one router to the

next until they reach their destinations. However, packets do not always travel in a

best route if some routing policies interfere in.

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good doc

good doc

Its really assist to clarify the concept.

nice