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Basics of Computer Networking: Implications and Applications

Explore the rise of computer networks and their impact on various aspects of society. Learn about the benefits and challenges of networked communication, globalization, privacy, and more.

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Basics of Computer Networking: Implications and Applications

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  1. CSC 110 – Fluency in Information TechnologyChapter 3: The Basics of Networking Dr. Curry Guinn

  2. Quick Info • Dr. Curry Guinn • CIS 2045 • guinnc@uncw.edu • www.uncw.edu/people/guinnc • 962-7937 • Office Hours: MTWRF: 10:00am-11:00am and by appointment • Course HomePage: http://people.uncw.edu/guinnc/courses/Fall08/110/csc110.htm Homework to be submitted by Blackboard Page

  3. Noted Author Holman and Local Writing Talent Showcased at UNC Wilmington "Thirsty Tome" Virginia Holman, noted author of Rescuing Patty Hearst: Growing Up Sane in a Decade Gone Mad, will be featured at the University of North Carolina Wilmington Randall Library's annual "Thirsty Tome" event at 7 p.m. on Wednesday, Aug. 27. This UNCWelcome event features local writers reading aloud from their work. http://library.uncw.edu/web/events/thirstytome08.pdf

  4. Today’s Class • Salaries • Highlights of Chapter 3 • The Rise of Computer Networks • Social Implications • Some terminology • Laboratory Activities • Internet geography

  5. Computer Science Majors’ Starting Salaries is Number Two of All Majors (2008) Here are the top starting salaries for Summer 2008 college graduates by major. Major Offer Chemical Engineering $63,165 Computer Science $60,416 13.1% growth Mechanical Engineering $57,009 Electrical Engineering $56,910 Management of Info. Systems $52,418 Civil Engineering $51,632 Economics $50,507 Finance $48,547 Accounting $48,085 Business Admin/Mgmt $45,915 Marketing $42,053 English $34,327 Sociology $34,796 Psychology $33,564

  6. Computer Networks Have Change Our Lives • Massive amounts of information freely and easily available • What are the ramifications of that? • Political • China • http://opennet.net/studies/china • http://cyber.law.harvard.edu/filtering/china/ • http://cyber.law.harvard.edu/filtering/china/China-highlights.html • Scientific • Cultural • Education • Commerce • eShopping (http://www.census.gov/eos/www/ebusiness614.htm, http://www.epaynews.com/statistics/transactions.html) • Telecommuting (44 mil) • http://www.jobsnake.com/articles/index.cgi?openarticle&8599&Top_10_Telecommuting_Questions_Answered • http://www.telcoa.org/id33.htm • Implications for globalization • Privacy

  7. Does It Make People More or Less Connected to One Another? • Email, IM, chat rooms, online games, Facebook • Internet Relationships http://bipolar.about.com/cs/menu_chat/a/0302_online1.htm

  8. Asynchronous vs. Synchronous • Synchronous communication requires that both the sender and receiver are active at the same time. (IM, telephone) • Asynchronous communication is such that the sending and receiving may occur at different times (email, snailmail, voicemail).

  9. Broadcast vs. Point-to-Point • Broadcast communication: One sender, many receivers • Point-to-Point: One sender, one receiver

  10. Messages are routed from your computer through many different devices before it may reach its destination

  11. Each machine has a unique IP address(IP = Internet Protocol)

  12. The TCP/IP postcard analogy.

  13. The Internet makes use of whatever routes are available to deliver packets.

  14. A ping from the author’s machine to eth.ch.

  15. The ARPA net, circa 1969

  16. Robert Metcalfe’s original drawing of the Ethernet design; the unlabeled boxes, computers, “tap” onto the wire that Metcalfe has labeled “The Ether.” (1976)

  17. Figure 3.9. A Web page and the HTML source that produced it. Notice that an additional image file, alto.jpg, is also required to display the page.

  18. … And now for the Lab • Under Administrative Tools – Performance, you can view the network traffic on your computer • Hit the add button (+) and pull-down “Network Interface”. • “Packets/sec” is a good choice. • Now when you go out to the network, you’ll be able to see how many packets are being passed to and from your computer. • Keep the monitor up during the lab as we’ll be using the WWW quite a bit.

  19. Activity 1 cont. • Looking at your computer’s network information • Bring up the Command Prompt and type ipconfig • Start – Run – cmd • Start-All Programs-Accessories-Command Prompt • When you go on the internet, other’s can see your IP. • Take a look at the following link: • http://www.lawrencegoetz.com/programs/ipinfo/ • On that page, find the IP2Location link and click it.

  20. Activity 2: Your DNS name • You can take any IP address and lookup up its DNS name (if it has one) • Write down (or copy into notepad your computer’s IP address) • Then go to this site and type it in • http://www.webreference.com/cgi-bin/nslookup.cgi • Notice lookup can go both ways (You can type in www.google.com, for example, to see google’s IP address. • http://www.showmyip.com/ • Other tools: • http://www.yougetsignal.com/

  21. Activity 3:Tracing Your Messages • Any of these trace programs allow you to visualize the path your message takes in getting from your machine to another. Try each one to see different ways of looking at what is known as a route trace. • Activity 3a) • http://www.yougetsignal.com/tools/visual-tracert/ • Activity 3b) • http://www.just-traceroute.com/?utm_source=just-ping.com&utm_medium=site&utm_campaign=just-ping • Activity 3a) Visual route http://visualroute.visualware.com/ (Requires download)

  22. Activity 4: The Geography of the Internet • http://www.cybergeography.org/atlas/atlas.html • Many ways to view the internet • Geographic, traceroutes

  23. Activity 4 cont • Conceptual: http://www.orgnet.com/netindustry.html

  24. Activity 4 cont • Artistic (http://www.cybergeography.org/atlas/atlas.html) • TextArc • Shredder

  25. Activity 4 cont. • Topology • http://www.touchgraph.com/TGGoogleBrowser.html

  26. Activity 4, Final • Information Spaces • http://www.kartoo.com/

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