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How Does the Internet Work? Part 2

Summary

Materials

Instructional Activities and Classroom Assessments

  1. Packet Switching Activity (25 minutes)
  2. Simulation Reflection (5 minutes)
  3. Review of How Internet Works (20 minutes)
  4. Homework

Learning Objectives

  • Computational Thinking Practices: Skill 5.A
  • CSN-1.A
  • CSN-1.B Explain how the Internet works.
  • CSN-1.C Explain how data are sent through the Internet via packets.
  • CSN-1.D Describe the differences between the Internet and the World Wide Web.

Essential Knowledge

  • CSN-1.A.5
  • CSN-1.A.6
  • CSN-1.B.1 The Internet is a computer network consisting of interconnected networks that use standardized, open (nonproprietary) communication protocols.
  • CSN-1.B.2 Access to the Internet depends on the ability to connect a computing device to an Internet-connected device.
  • CSN-1.B.3 A protocol is an agreed-upon set of rules that specify the behavior of a system.
  • CSN-1.B.4 The protocols used in the Internet are open, which allows users to easily connect additional computing devices to the Internet.
  • CSN-1.B.5 Routing on the Internet is usually dynamic; it is not specified in advance.
  • CSN-1.B.6 The scalability of a system is the capacity for the system to change in size and scale to meet new demands.
  • CSN-1.C.1 Information is passed through the Internet as a data stream. Data streams contain chunks of data, which are encapsulated in packets.
  • CSN-1.C.2 Packets contain a chunk of data and metadata used for routing the packet between the origin and the destination on the Internet, as well as for data reassembly.
  • CSN-1.C.3 Packets may arrive at the destination in order, out of order, or not at all.
  • CSN-1.C.4 IP, TCP, and UDP are common protocols used on the Internet. CSN-1.D.1
  • CSN-1.D.2 HTTP is a protocol used by the World Wide Web.
  • CSN-1.D.3

Details

0. Before Class Begins

  • Complete the tasks on the Preparation for Packet Switching Game page.

1. Packet Switching Activity (25 minutes)

  • Students will participate in a packet switching simulation.

2. Simulation Reflection (5 minutes)

  • Students will share what they learned.
  • They will compare the simulation to the Vox video they watched on Day 1.

3. Review How the Internet Works (20 minutes)

  • Discuss the details of packet switching:
    • Paths
    • Routing
    • Protocols
    • Internet Architecture

4. Homework

Students will watch a video and read an article about the difference between the Internet and the World Wide Web. Students will take notes on what they read.

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Preparation for Packet Switching Game