Internet is a network of networks which allows the decentralized interconnection of computers through a set of protocols called TCP / IP . It had its origins in 1969 , when an agency of Defense Department of the U.S He began to look for alternatives to an eventual atomic war that could isolate people. Three years later, the first public demonstration of the system devised was carried out, thanks to the fact that three universities of California and one of Utah they managed to establish a connection known as ARPANET (Advanced Research Projects Agency Network) .
Unlike what is usually thought, Internet and the world Wide Web They are not synonyms. The WWW It is an information system developed in 1989 by Tim Berners Lee and Robert Cailliau . This service allows access to information that is linked through the protocol HTTP (HyperText Transfer Protocol) .
Other services and protocols available in the network of networks are remote access to computers known as Telnet , the file transfer system FTP , the email (POP and SMTP ), file sharing P2P and online conversations or chats .
The development of Internet has far exceeded any forecast and constituted a true revolution In modern society. The system became a pillar of communications, entertainment and commerce in every corner of the planet.
Statistics indicate that, in 2006 , the Internet users (known as Internet users ) exceeded 1.1 billion people . It is expected that in the next decade that figure will double, driven by the massification of high-speed accesses (broadband ).