Introduction to Data Communication

Topic: Introduction to Data Communications
Review Questions
Use these questions to review the important material from the Topic Notes and Chapter 1 of the prescribed textbook.
The review should take place in your own time. Where possible you should work with your colleagues.
You can discuss your answers with your tutor in the week 2 tutorial.
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1. How do LANs differ from MANs, WANs, and BNs?
2. What is a circuit?
3. What is a client?
4. What is a server?
5. Why are network layers important?
6. Describe the seven layers in the OSI network model and what they do.
7. Describe the five layers in the Internet network model and what they do.
8. Explain how a message is transmitted from one computer to another using layers.
9. Describe the three stages of standardization.
10. How are Internet standards developed?
11. Describe two important data communications standards-making bodies. How do they differ?
12. What is the purpose of a data communication standard?
Lab Preparation
To prepare for the lab in week 2:
1. Via the Web find out about:
a. The hexadecimal number system
b. The ASCII character set
2. Convert the decimal number 90 to a hexadecimal number
3. Convert the hexadecimal number determined in 2 above, to an 8 bit binary byte and then determine what ASCII character this byte represents.