A router is an electronic
device which comes in a little box, and which connects one network
with another (for example, a Local Area Network with a
Wide Area Network). Routers do most of the task of directing traffic
on the Internet by sending the request from your network to
another while simultaneously preventing other unauthorised
users to access your network (this latter task is done with the help
of a firewall, a software program that intercepts and filters
unwanted packets of data that are either trying to enter your network
or access the resources of your network). A router examines
each packet of data that travels across the Internet, figures out
where it is headed, and “routes” it towards its destination in the
most efficient way possible. Usually, the packet of data goes to
another router and another, and another—until it reaches the
destination. Each router that a packet of data passes through to
reach its destination is considered a “hop.” A router must depend,
however, on gateways.
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