2. Table of Contents What is the Internet? The revolutionary idea The Baran model ARPANET E-mail TCP protocol DNS The World Wide Web Internet in its infancy Summary and Conclusion Video References
3. Today, the Internet is an enormous network of millions of computers allowing constant communication throughout the world. It includes: the World Wide Web, electronic mail (e-mail), File transfer Protocol (FTP), Internet Relay Chat (IRC) and USENET (news service) What is the Internet? PICTURE 1 2
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5. As Communism grew stronger, the US Air Force asked a small team of researchers to create a military communications network that could withstand a nuclear strike. The concept of this network relied on a decentralised system, so that the network could continue to function even if one or several machines were destroyed. The revolutionary idea 3
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7. Paul Baran had the idea to create a network in the form of a large web.
8. Paul Baran created a hybrid network using both mesh and star topology, in which data would travel dynamically, "searching" for the clearest pathway, and "waiting" if all routes were blocked.
11. The experimental network ARPANET was created by ARPA (Advanced Research Projects Agency, a division of the United States Department of Defense)
12. The ARPANET is now considered the precursor to the Internet. At that time, it already included several fundamental characteristics of the current network: One or several cores could be destroyed without disrupting the network's operation; Communication between machines could take place without the direction of a central machine; The protocols used were basic. ARPANET 5
16. Lawrence G. Roberts improved upon the horizons pioneered by Tomlinson by developing the first application for listing, selectively reading, archiving, and responding to or forwarding an e-mail. Since then, e-mail has never stopped growing in influence, becoming the most common use of the Internet at the turn of the 21st century.
18. The ARPANET was introduced to the general public for the first time, at the ICCC (International Computer Communication Conference). Around that same time, ARPA became DARPA (Defense Advanced Research Projects Agency) and the term "internetting" was used to refer to ARPANET, which was later shortened to "Internet." 6
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20. Bob Kahn asked Vinton Cerf (then at Stanford) to help him build the protocol.
24. TCP was split into two protocols: TCPand IP, forming what would become the TCP/IP suite. TCP protocol (Transmission Control Protocol)
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26. In order to remedy the lack of flexibility inherent in hosts files, in which machine names and their respective addresses were stored in text files that had to be updated manually. DNS (Domain Name Server) 7
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28. Tim Berners-Lee, a researcher at CERN in Geneva, engineered a hypertext navigation system, and developed, with the help of Robert Cailliau, a software program called Enquire for navigating it.
30. Tim Berners-Lee finished the protocol HTTP (Hypertext Transfer Protocol), as well as HTML (HyperText Markup Language) for browsing networks by using hyperlinks. The World Wide Web was born. 9
31. Internet in its infancy 10 It comprises millions of smaller networks, which carry diverse applications and services, as well as considerable volumes of data. Through this connectedness, distinct benefits are realized: information can be inexpensively accessed from almost any source on the network, and it is possible to interact with people and organizations, regardless of number and independent of geographic locations. 11 Growth in global internet user from 1997 to 2006
32. Internet/WWW provides access to a global information system makes it possible for many to access makes it easy to publish information presents some serious legal issues is impossible to manage centrally Future More growth Increased commercial activity Increasing amounts of change Conclusion 13 12
