mis.con.cepti.ons

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Feel free to use this with attribution. I put this deck together in Fall 2010 for CIS 1 at Foothill College.

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mis.con.cepti.ons

  1. 1. <ul>mis.con.cepti.ons </ul><ul>by Christine Bush </ul>
  2. 2. <ul>This brief presentation will review some common misconceptions about the Internet and World Wide Web. </ul>
  3. 3. <ul>&quot;the internet is a network of networks&quot; </ul><ul>  While the Internet satisfies the notion of being a network of networks, it is not just any network of networks. Rather, the Internet is the aggregate of all networks and the protocols and mechanisms which connect them.           </ul><ul>Shown:  http://www.ics.uci.edu/~wscacchi/Tech-EC/EC-EB/Internet-map.gif </ul>
  4. 4. <ul>&quot;the world wide web is a subset of the Internet&quot; </ul><ul>The World Wide Web relies on a set of conventions about: </ul><ul><ul><li>how to cross-reference hypertext documents using a specific kind of uniform resource identifier (URI), called a uniform resource locater (URL); </li></ul></ul><ul><ul><li>how to transfer web content identified by URLs across the Internet;
  5. 5. how to dynamically generate web content to be shared upon request using a combination of browser, database and scripting technologies. </li></ul></ul><ul>Shown: </ul><ul>http://www.allsoftworks.com/media/webb(1).jpg </ul>
  6. 6. <ul>&quot;a browser lets you see anything on the web&quot; </ul><ul>Actually, a browser just displays anything you can retrieve from the web.  And here's how that actually works: </ul><ul><li>User launches browser.
  7. 7. User selects scope of search.
  8. 8. User provides search string.
  9. 9. Browser sends an HTTP request to DNS with URL + Query
  10. 10. DNS routes HTTP request to server running search engine process
  11. 11. Search engine processes Query.
  12. 12. Search engine generates HTML containing relevant matches to query.
  13. 13. Server returns HTTP request with content packets to browser. 
  14. 14. Browser displays results to user for consideration. </li></ul><ul>Shown:   http://4.bp.blogspot.com/_mpBGa4P5jUo/Sxk2ioJGSwI/AAAAAAAAD_8/KUpJJnATQWk/s400/tron3.jpg </ul>
  15. 15. <ul>&quot;I can only connect to the Internet at work or school.&quot; </ul><ul>Internet Access comes in many flavors:   </ul><ul><ul><li>Mobile
  16. 16. WiFi
  17. 17. Public WAN
  18. 18. Corporate LAN
  19. 19. Private LAN
  20. 20. Home Network
  21. 21. Dial-Up </li></ul></ul><ul>Shown:   http://www.nthelp.com/images/uunet.jpg </ul>
  22. 22. <ul>&quot;the web address is just etudes.edu, or something like that&quot; </ul><ul>Parts of an Internet Address (URL): http://subdomain.machine.domain.tld:port/dir/file.extension </ul><ul>Shown: http://upload.wikimedia.org/wikipedia/commons/9/9f/Postcard_Bermuda_1907_address.jpg </ul>
  23. 23. <ul>&quot;Acronyms Abound on the Internet&quot; </ul><ul>Domain Name System, Domain Name Server (DNS)   Transmission Control Protocol (TCP)/Internet Protocol(IP)   File Transfer Protocol(FTP)   Search Engine Optimization (SEO)   Top-Level Domain (TLD)   Extensible Markup Language (XML) </ul>
  24. 24. <ul>&quot;Just Google it to find what you need&quot; </ul><ul><ul><li>WWW search tools:   Google, Bing, Yahoo!, Ask, A9
  25. 25. Topical search tools:  WorldCat.org, RollyO.com, StumbleUpon
  26. 26. Media-type search tools (audio, video, image):   iTunes Store, Google Images, Google Video
  27. 27. Domain or repository-based search: WayBack Machine, NYTimes.com, Amazon.com
  28. 28. Desktop search: OS X Spotlight, Windows Search </li></ul></ul><ul>Shown: </ul><ul>http://www.searchlores.org/images/babel.jpg </ul>
  29. 29. <ul>Shown:  http://www.pinewswire.net/wp-content/uploads/2010/03/Data-Mining-420x325.jpg </ul><ul>&quot;I always delete cookies from my browser so nobody can track my family online.&quot; </ul><ul>To paraphrase the old advertisement: &quot;It's 11PM.  Do you know where your child's data is?&quot; Managing the data on your computer is only one part of protecting your family online.   What about all the data that has already been sent from it?  THINK BEFORE YOU CLICK. </ul>
  30. 30. <ul>Material covered in this presentation is based on 14 years of experience online and fact checking against a fine textbook: Dale, Nell B, and John Lewis. Computer Science Illuminated . Sudbury, Mass: Jones and Bartlett Publishers, 2011. Print. </ul>
  31. 31. <ul>The Internet and the World Wide Web are often confused with one another.  When discussing online protocols or resources, err on the side of specificity . </ul>
  32. 32. <ul><li>Shown:  http://www.unc.edu/courses/jomc050/idog.jpg </li></ul><ul>...but on the World Wide Web , they might! </ul>

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