TheInternet - ...

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<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>The Internet</title> <meta name="copyright" content="Copyright &#169; 2008 by Martin B. Wolske" /> <link rel="stylesheet" type="text/css" media="screen, projection, print" href="http://www.w3.org/Talks/Tools/Slidy/slidy.css" /> <script src="http://www.w3.org/Talks/Tools/Slidy/slidy.js" charset="utf-8" type="text/javascript"></script> <link rel="stylesheet" type="text/css" media="screen, projection, print" href="http://www.w3.org/Talks/Tools/Slidy/w3c-blue2.css" /> </head> <body> <div class="background"> <img id="head-icon" alt="graphic with four colored squares" src="http://www.w3.org/Talks/Tools/Slidy/icon-blue.png" /> </div> <div class="slide cover"> <div style="text- align:center;width:60%;position:relative;left:20%;top:20%"> <h1> The Internet<br /> LIS 451 * Summer 2008<br /> Introduction to Networked Information Systems<br /> </h1> <p> <a href="https://apps.lis.uiuc.edu/wiki/display/~mwolske/Martin+Wolske%2C+Ph.D."> Martin Wolske, Ph.D.</a> ( <a href="mailto:mwolske@uiuc.edu">mwolske@uiuc.edu</a>) </p> </div> </div> <div class="slide" id="SharingACommunicationsNetwork"> <h1>Sharing a Communications Network</h1> <ul> <li><dfn>Baseband</dfn> communications technologies, including phone and Ethernet, carry only a single signal at a time. <ul> <li><dfn>Circuit switching</dfn> temporarily creates a dedicated circuit between sender and recipient. The most typically use is with voice communications networks, in which dialing a phone creates a dedicated circuit between the initiator of the call and the recipient. During the time of the dedicated circuit, other callers receive a busy signal. </li> <li><dfn>Packet switching</dfn> divides larger data into smaller packets that can then share the communications line with other packets from other data. Think of a modular home being delivered in separate pieces using the Interstate Highways. </li> </ul> </li>
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<li><dfn>Broadband</dfn> communications technologies, including Cable TV and DSL, carry multiple signals at a time (although only one or two channels may be dedicated to Internet access, with those channels still using packet switching. </li> </ul> </div> <div class="slide" id="MoreAboutTCPIP"> <h1>More about TCP/IP</h1> <ul> <li><dfn>TCP/IP</dfn> is <em>THE</em> high level protocol of the Internet. Given the near ubiquity of the Internet and the flexibility of TCP/IP, it has replaced most other high level protocols for LAN activities as well. </li> <li>As a high level protocol TCP/IP manages basic functions such sessions and reliable transfer of data (<dfn>TCP</dfn>) as well as the process of breaking data into packets and routing data (<dfn>IP</dfn>).
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This note was uploaded on 02/09/2010 for the course GSLIS LIS451 taught by Professor Martinwolske during the Summer '08 term at University of Illinois at Urbana–Champaign.

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TheInternet - ...

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