Routers use a combination of hardware and software to forward data packets to their
destination on the internet. They are more efficient and sophisticated than bridges and
switches. They can divide large networks into logical segments called Subnets on the basis of
IP addressing scheme. A router can communicate with another router on the internet with
the help of Routing Information Protocol, and thus it can build a routing table. This routing
table contains information about different network addresses and different routes for
delivery of data packets to a host machine on a network. A router is a decision making
device. When a data packet arrives at a router it reads the network addresses from the IP
address on the data packet and determines the shortest possible path through which this
packet can be delivered to its destination.
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