Internet

is data networking that joins computers all over the world and that permits to exchange information. Data are transmitted through the intermediary of telephone lines, cables or satellites
To communicate between them, the computers connected to Internet use a common language (named protocol) and are equipped of software (or programs) permitting the exchanging of data.

HOW IS BORN the INTERNET?
Internet is descended of the Arpanet network, that has been conceived in 1969 by the agency for the projects of advanced research (ARPA, Advanced Research Project Agency) for the American department of the Defense. Reserved originally to soldiers, the Arpanet network spread progressively to the universities and to the American administrations.…
In 1990, Arpanet is connected to many other networks, all based on the same protocol of communication (TCP/IP): it is the rebirth of Internet.
At the end of the twentieth century, Internet joins millions of people through the world. Internet doesn't belong to anybody and no one is controlled. The users of Internet (named internauts) have access to many services, of which the World Wide Web and the electronic mail.
WHAT IS THE WORLD WIDE WEB?
The term " World Wide Web" (often abstract in WWW or in Web) means " "world spider canvas in French. It is together a gigantic of pages electronic so-called Web pages, bound between them by hypertext links. It is sufficient to click on a tie to be directed toward a new page. The information of these pages can appear as texts, pictures, sound or video. Every page belongs to a Web site, that is a set of pages created by an individual, an enterprise or an organization.
To reach Web pages, one uses a navigator (or browser in English). A navigator is a software that permits to consult some search engines notably. These motors are very useful to find an information, because he/it exists today several hundreds of millions of Web pages. While hitting one or several keywords, one gets a list of pages containing the sought-after information.

The Web doesn't only serve to find some information. He/it permits to recover among others (or to download) of the electronic files, to buy or to sell some objects. Otherwise, the amateurs of video games can, thanks to Internet, to face many other players all over the world.
HOW CAN ONE SEND ITSELF OF THE MESSAGES ON INTERNET?
The electronic mail permits to send an electronic message (as named e-mail) to one or several internauts. For it, it is sufficient to know the electronic address (or address e-mail) of the one who sends the message and to be equipped with a messaging software. This software permits to hit the text and to join a file to its message. If it is connected to Internet, the correspondent receives the message after some seconds or some minutes (according to the debit of the connecting lines). The use of the electronic mail can sometimes present some risks. Indeed, many computer viruses transmit themselves by electronic mail and can damage data stocked on the computer.
To communicate, the internauts can also meet in lounges of discussion (as named " chat" = to pronounce " tchat"). These lounges allow two or several people to exchange some messages real-time.It is sufficient for it to connect to a Web site or to install a software on his/her computer.
HOW DOES ONE CONNECT TO INTERNET?
To reach Internet, the user must possess a modem and have subscribed to an access provider. The modem is a device that permits to receive and to send data through the intermediary of a telephone line or a cable. The access provider puts in contact the subscriber's computer with the set of the other computers connected to Internet. It is a sort of entry door. It also provides to the internaut one or
several electronic addresses and can shelter the Web pages that he created.
A new technology, named Wi-Fi (contraction of Wireless-Fidelity, meaning " cordless quality"), also permits to reach Internet. All data are transmitted by radio waves of a computer to the other, without modem nor telephone line. This type of connection is very fast, but functions in some areas only.