1. Brief History of Internet

2. Internet Impact Check weather Buy goods Play music Find the shortest route Give a lecture…

3. The Incredible Growth

4. Brief Internet History Batch Environment - 1950s No direct interaction between users and their programs during execution Time Sharing - 1960s Users were able to interact with the computer and could share its information processing resources Marked the beginning of computer communications

5. Brief Internet History (cont.) Time Sharing: Dumb terminals connected to a central computer system

6. Brief Internet History (cont.) Late 1960s: ARPANET ARPA (Advanced Research Projects Agency) commissioned an experimental computer network 1970s: Distributed Processing: minicomputers; Communication between neighbor processors and applications via networks Growth of ARPANET and Invention of Email

7. Brief Internet History (cont.) 1980s: WAN and LAN Prototype Internet TCP/IP:Allows different networks to interconnect

8. A LAN Example B A C D E

9. Internet: a network of networks The Internet

10. Brief Internet History (cont.) 1990s: WWW HTTP and HTML Marc Andreessen: Mosaic (all-in-one solution) Commercial traffic allowed ECommerce

11. Networking Questions Over what medium? At what speed? How to address computers? Which path? How to handle (detect & recover) errors? What services? How to address documents? What data format?