BDC6eChapter4(1)

BDC6eChapter4(1) - Chapter 4: The Internet Business Data...

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Chapter 4: The Internet Business Data Communications, 6e
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Internet History Evolved from ARPANet (Defense Department’s Advanced Research Projects Agency Network) ARPANet was developed in 1969, and was the first packet-switching network Initially, included only four nodes: UCLA, UCSB, Utah, and SRI
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Switching Methods Circuit Switching: Requires a dedicated communication path for duration of transmission; wastes bandwidth, but minimizes delays Message Switching: Entire path is not dedicated, but long delays result from intermediate storage and repetition of message Packet Switching: Specialized message switching, with very little delay
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ARPANET Used 50kbps links Buffers allowed connection between different data rates Introduced adaptive routing First two open standards; FTP, Telnet 2/3s of all ARPANET traffic was email
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ARPANET Applied packet switching to other tech SATNET, Packet Radio Each tech needed special packet size TCP Protocol developed, eventually refined into TCP/IP suite
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NSF and the Internet In the 1980s, NSFNet extended packet-switched networking to non-ARPA organization; eventually replaced ARPANet Instituted Acceptable Use Policies to control use CIX (Commercial Internet eXchange) was developed to provide commercial internetworking
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NSF (National Science Foundation) In 1985, established NSFNET to serve US Universities Also provided the backbone for US Internet Service Used 1.544 Mbps links Developed many policies still used today First “acceptable use” policy
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This note was uploaded on 11/06/2011 for the course EST 321 taught by Professor Matt during the Fall '11 term at SUNY Stony Brook.

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BDC6eChapter4(1) - Chapter 4: The Internet Business Data...

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