What is a network?
A
computer network can be described as a system of interconnected devices
that can communicate using some common standard (called protocol).
These devices communicate to exchange resources (e.g. files and
printers) and services.
Here is an example network consisting of two computers connected together:
In
the example above, the two computers are directly connected using a
cable. This small network can be used to exchange data between just
these two computers.
What
if we want to expand our network? Then we can use a network device,
either a switch or a hub, to connect more than two computers together:
Now all of the devices on the network can communicate with each other.
We’ll
talk more about hubs and switches in just a moment. For now, just
remember that these devices serve as a central point to which all of the
computers connect to.
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