Topic 4c
Internet Protocols

Learning Objectives

By the end of this topic students should be able to:

  • Give a general explanation of how a web page is requested/received by a web browser.
  • Explain the concept of ports in internet traffic.
  • Explain the difference between TCP and UDP and why we want (need) both.

 

Learning Materials

  • Readings
    • Section 4.4 - pp 215-222 in your book
  • Unplugged Activity
    • When this course has a face-to-face component I conduct a hands-on, unplugged activity that gives participants an opportunity to explore the way that messages are divided into packets and the protocols devised to make sure that messages can be properly reassembled by the receiver.
    • While you do not have an opportunity to complete this activity with your peers, I think it is worth your time to read the activity and consider what it would look like both with adults and with your students.
    • Tablets of Stone - Protocols Unplugged

    •  

Checking for Understanding

Answer the following questions from your textbook. The answers to all Q&E questions are in the back of your book in Appendix F.

  • p 222, #2
  • p 222, #3
  • What network traffic is generated when you type a URL into your browser to load a webpage?

 

Answers & Guidance

The answers to the CFU questions above are provided in the back of the book. The following videos explain how we would arrive at some of those answers.