A computer network is two or more computers (known as nodes in networking) that are connected together, usually by cables (coaxial, fiber optic or twisted pair) or wirelessly (microwaves). But, computers are not only referred to personal computers or laptops, but also to servers (email, printers, applications, file storage, etc.), tablets, mobile phones, and any electronic device with a network interface card.
Moreover, there are different network devices such as switches, routers, hubs, access points and others, that allow networks to improve their performance, to increase their capacity, to manage traffic, among other. But these devices will be seen in detail in next units.
Now, it's time to see which their main uses are.
Its main use is to share "things" among connected users. These "things" are:
1. Information and data (files, pictures, videos, documents, etc.)
2. Resources (disks, printers, programs, etc.)
3. Services (access to a database, chat, games, internet, email, etc.)
From their definition and uses, we are going to analyze their advantages and drawbacks. But, please first think you about it and note them. Then check your answers in next section.
Next picture shows you the main benefits and the problems of a network: