LESSON PLAN 26: Introduction to Data Communication Terminology

LESSON PLAN 26: Introduction to Data Communication Terminology

Lesson Details

Strand: 2.0 Computer Networking
Sub Strand: 2.1 Data Communication
Duration: 40 minutes (Single lesson)
Lesson: 1 of 4
Class Level: Grade 10

Key Inquiry Question (Lesson Starter)

How is data communicated in computer networking?

Specific Learning Outcomes

By the end of the lesson, the learner should be able to:

a) explain the terminologies used in data communication,

b) define key concepts in data communication systems,

c) understand the basic components of data communication.

Selected Learning Experiences

Introduction (7 minutes)

• Pose the key inquiry question to stimulate thinking
• Ask learners: “When you send a message on WhatsApp, how does it reach your friend?”
• Brief discussion on everyday data communication experiences
• Show visual: sending an email from one computer to another
• Ask: “What do you think happens between clicking ‘Send’ and the message arriving?”
• Introduce data communication as the foundation of computer networking

Development Activities (28 minutes)

Activity 1: Defining Data Communication Terms (15 minutes)

• Use print or digital media to search for definitions of the terms used in data communication

Key Terms and Definitions:

Basic Components:

1. Data:
   • Raw facts, figures, or information
   • Can be text, numbers, images, audio, video
   • Examples: email message, photo, video call, web page
   • Must be converted to signals for transmission
2. Signals:
   • Electromagnetic waves that carry data
   • Two types:
     • Analog signals: Continuous waves (like radio waves)
     • Digital signals: Discrete, on/off pulses (binary: 0s and 1s)
   • Computers use digital signals
3. Communication Channel:
   • Path through which data travels
   • Also called transmission medium
   • Can be physical (cables) or wireless (radio waves)
   • Examples: Ethernet cable, fiber optic, Wi-Fi, cellular network
4. Network:
   • Two or more devices connected for communication
   • Allows sharing of resources and information
   • Types: LAN (Local Area Network), WAN (Wide Area Network), Internet
   • Examples: School computer lab, home Wi-Fi, the Internet
5. Transmission Media:
   • Physical or wireless pathways for data
   • Guided media: Cables (twisted pair, coaxial, fiber optic)
   • Unguided media: Wireless (radio, microwave, satellite, infrared)
   • Choice depends on distance, speed, cost, environment