2. The origin of the Internet dates back to 1969, in particular the proposal of the U.S. Department of Defense to develop a decentralized network of interconnected computers called ARPANET. For this project are developed and implemented network protocols underlying the Internet and the first network infrastructure .At the end of the Cold War was made available for civilian use, linking the first major academic centers and reaching then, so large, corporate customers and finally the home. ARPANET
3. The progenitor and precursor of the Internet is considered the ARPANET project, funded by the Defense Advanced Research Projects Agency. The network was physically built in 1969 by linking four nodes: University of California at Los Angeles, the SRI, Stanford, the University of California at Santa Barbara, and the University of Utah. The bandwidth was 50 Kbps. The applications were made basically Telnet programs and File Transfer Protocol (FTP). The following year Arpanet was presented to the public, and Tomlinson adapted its program to work: immediately became popular, thanks to the contribution of Larry Roberts, which had developed the first program for managing electronic mail. ARPANET
4. WORLD WIDE WEB In 1991 at CERN in Geneva, the researcher Tim Berners-Lee defined the HTTP (HyperText Transfer Protocol), a system that allows you to read hypertext, non-sequential files, jumping from one point to another through the use of references (link or, more properly, hyperlink. In the World Wide Web (WWW), available resources are organized in a library, or pages, which can be accessed using special programs called browser with which you can navigate viewing files, text, hypertext, sound, images, animations, movies.
5. INTERNET Until 2000 there was fear of having to re-scratch the Internet (there was talk of Internet2) because the number of hosts addressable through the IP protocol was close to being exhausted (IP shortage) by the number of hosts actually connected ( in addition to the necessary redundancy and losses for social reasons). The problem was partially avoided by using the technique of the NAT / gateway through which a corporate network does not need a wide range of fixed IP addresses. Today it is confident in the ability to migrate in a non-traumatic to version 6.0 of IP (IPv6) which will release about 340 billion billion billion billion addressable IP numbers.
