Lesson 8 of 10 – Computer Network
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What is a Computer Network?

A computer network is a group of two or more computers connected together so that they can share data, resources, and services.

In simple words: A computer network helps computers communicate with each other and share information.

What is a Computer Network?

A computer network is a system in which two or more computers and devices are connected using cables, Wi-Fi, or other communication media. It allows users to share files, printers, internet, and other services.

Why Do We Use Computer Networks?

File Sharing

Computers in a network can share documents, photos, videos, and other files easily. This saves time and makes teamwork easier.

Hardware Sharing

Devices like printers and scanners can be shared among multiple computers in a network. This reduces cost and increases convenience.

Internet Sharing

One internet connection can be shared by many computers through a network. This is common in schools, offices, and homes.

Communication

People can communicate through email, chat, video calls, and online meetings using a network.

Central Storage

Networks can store data in a central server or cloud system. This makes it easy to manage and access information from different devices.

Examples of Computer Networks

LAN

LAN stands for Local Area Network. It covers a small area such as a home, school, office, or computer lab.

MAN

MAN stands for Metropolitan Area Network. It covers a city or a large town.

WAN

WAN stands for Wide Area Network. It covers a very large area such as a country or the entire world. The Internet is the best example of a WAN.

Components of a Computer Network

Router

A router connects different networks and helps send data from one network to another.

Switch

A switch connects multiple devices inside a network and sends data to the correct device.

Modem

A modem helps connect the computer network to the internet.

Cables / Wi-Fi

Cables or wireless signals are used to connect devices in a network.

Server and Client

A server provides services and data, while a client requests and uses those services.

Advantages of Computer Network

  • Easy communication
  • Cost saving
  • Data sharing
  • Central storage
  • Access from anywhere

Real Life Examples

  • School lab
  • Office network
  • Bank ATM network
  • Railway system
  • Internet
💡 Remember
A computer network helps computers and devices connect, communicate, and share resources easily.

🧠 Quiz

LAN stands for?