A net It is a structure that has a pattern that characterizes it. The notion of computing , on the other hand, refers to the knowledge of science that allows the processing of data in an automated way through computers (computers).
With these concepts clear, we can understand what the idea of computer network . It is the set of teams (computers , peripherals, etc.) that are interconnected and share various resources.
This type of networks implies the equipment interconnection through certain devices that allow the sending and receiving of waves , which carry the data you want to share. In computer networks, therefore, there are transmitters and receivers that exchange messages.
The objective of a computer network is that computers can share your resources remotely . Thus, if there are five computers in an office, they can be networked so that each one can access the data of the others. If you also connect a printer to the network, it will also be possible to print documents from any of them.
Another purpose of a computer network is the reduction of costs; In many companies, the equipment used by their employees is nothing more than nodes They constantly communicate with a large server, the true person in charge of data processing and sending responses to the first ones so that users can take advantage of the resulting information and carry out their tasks.
If in a case like this a network is not used but each worker is provided with a computer capable of performing all the work independently, the investment of the company should be greater, not only when buying the equipment but of keeping them, since the complexity of each one would be greater than that of the nodes .
According to the type of Connection , to the relationship between the elements and the scope, it is possible to qualify a computer network in different ways. Internet In fact, it is a computer network: millions of computers are interconnected through servers and can share all kinds of data.
For a computer network to develop, computers need to have a network card (also known as network card ). This device of hardware It allows sending and receiving data packets.
Broadly speaking, the components Basic to create a computer network are the hardware (the equipment and the physical part), the software (the logical part) and the protocols (models and standards used to determine how the network should work). With respect to the physical part, it is possible to distinguish between end user devices (computers and peripherals that offer services to the user directly) and network (all that are interconnected to allow the former to communicate with each other).
In the software plane we find the following two components of a computer network:
* network operating system : serves to allow computers to connect to each other and allow users that access the different resources and services. A network needs the operating system to function properly in the same way as a personal computer. Typically, this operating system is part of what clients and servers use;
* Applications : This wide group includes all the programs that users can use directly, such as word processors, spreadsheets and databases. Although the background configuration differs from that used in a personal computer, since the computer network focuses on the use of data shared and in control of them, the final experience of each user can be very similar to what you have in your home, for example.