tailieunhanh - Lecture Digital communication systems - Lecture 23

The learning objectives for this chapter include: recognize the global leaders in newspapers, radio, and television; distinguish among the four main theories of government-press relationships; categorize media systems by ownership patterns and degree of government control; understand how politics, culture, geography, history, and economics affect a country's media system. | 12 10 12 INTRODUCTION TO EECS n DIGITAL COMMUNICATION SBSTEMS Fall 2012 Lecture 23 A Brief History of the Internet Fall 2012 Lecture 23 Slide 1 ARPANET BBN team that implemented the interface message processor IMP Photographs source unknown. All rights reserved. This content is excluded from our Creative Commons license. For more information see http fairuse. - 1967 Connect computers at key research sites across the US using telephone lines - Interface Message Processors IMP ARPA contract to BBN - Sen. Ted Kennedy sends a somewhat confused telegram to BBN on winning the contract Congratulations . on interfaith message processor The Dawn of Packet Switching ARPA 1957 in response to Sputnik Paul Baran RAND Corp RAND Corporation On Distributed Communications Introduction to Distributed Communications Networks RM-3420-PR 1964. Reprinted with permission. Fall 2012 - Early 1960s New approaches for survivable comms systems hot potato routing and decentralized architecture paper on packet switching over digital links Donald Davies UK early 1960s - Coins the term packet Len Kleinrock MIT thesis Information flow in large communication nets 1961 J. Licklider W. Clark MIT On-line Man Computer Communication 1962 Licklider s vision of a galactic network L. Roberts MIT then ARPA first ARPANET plan for time-sharing remote computers Initial Baby Steps Alex McKenzie. All rights reserved. This content is excluded from our Creative Commons license. For more information see http fairuse. Fall 2012 Lecture 23 Slide 4 Lecture 23 Slide 2 1 12 10 12 In the Beginning. Kleinrock s group at UCLA tried to log on to SRI computer His recollection of the event. We set up a telephone connection between us and the guys at SRI. September 1971 1970 ARPANET hosts start using NCP first two cross-country lines BBN-UCLA and MIT-Utah Hostile overlay atop telephone network Ran a distance-vector routing protocol We typed the L and we asked on the phone. - Do you .