A network may be described as a system of interconnected devices that may communicate using some common standard (called protocol). These devices communicate to exchange resources (e.g. files and printers) and services.
Here is Associate in Nursing example network consisting of 2 computers connected together:
In the example above, the 2 computers are directly connected using a cable. This little network may be wont to exchange information between just these 2 computers.

What if we would like to expand our network? Then we will use a network device, either a switch or a hub, to attach quite 2 computers together:

Now all of the devices on the network will communicate with one another.

We’ll speak additional regarding hubs and switches in only a flash. For now, simply keep in mind that these devices function a central purpose to that all of the computers connect with.

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