2. THE INTERNET

3. Reasons for development
The desire to create a robust communications system.
The desire to share resources(computers).

4. Why robust?

5. Sputnik Launched 1957

6. Packet Switching
Paul Baran develops the concept of packet switching while working at the RAND(Research and Development) corporation.
In packet switching:
There is no centralized control.
Messages are broken into “packets” which allows for lower latency.
One way to think of a packet is like a letter with a origin and return address.

7. 1966 ARPANET
First large scale network to use packet switching built by ARPA(Advanced Research Projects Agency).
ARPANET was a realization of Vannevar Bush’s Iron Triangle.
Managed by Lawerence Roberts.

8. The Iron Triangle (Military Industrial Complex)‏
Industry
University
Military

9.
First packet sent between UCLA, Stanford, UC Santabarbra, U Utah.
Timesharing between Universities becomes important.

10. 1972-1973 Lawerence Roberts writes the first email program.
By % of all traffic on the Internet is devoted to .

11.
A standard protocol in needed so that various networks can send information to one another. TCPIP becomes the defacto standard in 1982.
In 1986 NSFNET goes online.
1990 ARPANET ceases to exist.
1991 Tim Berners-Lee launches the Web as a publicly available service on the Internet. HTML, HTTP.
1993 CERN announces WWW free.
1995 NSFNET no longer allows direct access. Users gain access through ISPs.