ICT Class 4 - Computer Networks Notes
Comprehensive study notes for Class 4 - Computer Networks olympiad preparation
Computer Networks
Welcome to the chapter on Computer Networks for Class 4. In this chapter, you will learn what a computer network is, why networks are important, and how computers connect and share information. By the end of this chapter, you will understand the basics of computer networks and how they help us in our daily life!
Introduction
A computer network is a group of computers connected together so they can share information and resources. Networks help us send messages, share files, and use the internet.
Types of Computer Networks
- LAN (Local Area Network): Connects computers in a small area like a school or office.
- WAN (Wide Area Network): Connects computers over a large area, like different cities or countries.
- Internet: The biggest network in the world, connecting millions of computers globally.
Why Do We Need Computer Networks?
- To share files and information quickly.
- To send emails and messages.
- To use printers and other devices together.
- To access the internet and websites.
How Do Computers Connect?
- Using wires (cables) or wireless signals (Wi-Fi).
- Through devices like routers and switches.
- By following special rules called protocols.
Fun Activity: Draw a Network!
Draw a picture showing computers connected in a network. Show how they share a printer or send messages to each other!
Summary
- A computer network connects computers together.
- Networks help us share information and use resources.
- LAN, WAN, and the Internet are types of networks.
Practice Questions
- What is a computer network?
- Name two types of computer networks.
- Why do we use computer networks?
- How do computers connect in a network?
- What is the largest computer network in the world?
Challenge Yourself
- List three things you can do using a computer network.
- Find out how many computers are connected in your school’s computer lab.
Did You Know?
- The Internet started as a small network called ARPANET in 1969!
- Wi-Fi lets computers connect without wires.
Glossary
- Network: A group of computers connected together.
- LAN: Local Area Network, for small areas.
- WAN: Wide Area Network, for large areas.
- Internet: The world’s largest network.
- Wi-Fi: Wireless way to connect computers.
Answers to Practice Questions
- A computer network is a group of computers connected together to share information and resources.
- LAN and WAN (also Internet).
- To share files, send messages, use printers, and access the internet.
- Using wires or wireless signals, and devices like routers.
- The Internet.
Computer networks help us connect, share, and learn. Explore how networks work around you!