What is 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 allows computers to communicate with each other.

Why Do We Use Computer Networks?

• Share files (documents, photos, videos)
• Share hardware (printers, scanners)
• Share internet connection
• Communication (email, chat, video calls)
• Central storage (server, cloud)
• Online gaming

Examples of Computer Networks

• LAN – Small area (home, school)
• MAN – City level
• WAN – Large area (Internet)

Components of Computer Network

• Router – connects networks
• Switch – connects devices
• Modem – internet connection
• Cables / Wi-Fi
• Server & Client

Advantages

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

Real Life Examples

• School lab
• Office network
• Bank ATM network
• Railway system
• Internet