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

2. Quick Info Dr. Curry Guinn CIS 2045 guinnc@uncw.edu
Office Hours: MTWRF: 10:00am-11:00am and by appointment
Course HomePage:
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.

4. Today’s Class Salaries Highlights of Chapter 3 Laboratory Activities
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, % 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
Scientific
Cultural
Education
Commerce
eShopping (
Telecommuting (44 mil)
Implications for globalization
Privacy

7. Does It Make People More or Less Connected to One Another?
, IM, chat rooms, online games, Facebook
Internet Relationships

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 ( , snailmail, voic ).

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)

14. The TCP/IP postcard analogy.

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

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

17. The ARPA net, circa 1969

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

19. Figure 3. 9. A Web page and the HTML source that produced it
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.

20. … 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.

21. 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:
On that page, find the IP2Location link and click it.

22. 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
Notice lookup can go both ways (You can type in for example, to see google’s IP address.
Other tools:

23. 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)
Activity 3b)
Activity 3a) Visual route (Requires download)

24. Activity 4: The Geography of the Internet
Many ways to view the internet
Geographic, traceroutes

25. Activity 4 cont
Conceptual:

26. Activity 4 cont
Artistic (
TextArc
Shredder

27. Activity 4 cont. Topology

28. Activity 4, Final
Information Spaces