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lect2_networking

lect2_networking - Links of the Internet Communication...

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Links of the Internet – Communication Channels and Protocols Lixia Zhang CS1 Seminar October 8, 2007
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10/8/07 CS1 2 What is Internet? From users view – A network that connects up millions of computers aroud the world – These computers running millions of different applications and busy exchanging data with each other From system's view: – An interconnection of many different networks – The Internet Protocol (IP) is used to deliver data for all applications to all destinations
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10/8/07 CS1 3 Where did Internet come from? UCLA UCLA The conceptual design started much earlier
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10/8/07 CS1 4 First basic concept of Internet: packet switching Invented in early 60's Using computers for data communication How it works: Statistical multiplexing Second basic concept: Adaptive routing
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10/8/07 CS1 5 Why Packet Switching? Telephone network: circuit switching Fundamental assumptions: – The end is dumb (phoneset!) – The network is smart and in control – Serving one application only
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