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 talk to each other.

Why Do We Use Computer Networks?

• Share files (documents, photos, videos)
• Share hardware (printers, scanners)
• Share internet connection
• Communicate (email, chat, video calls)
• Store data centrally (servers, cloud)
• Play multiplayer games

Examples of Computer Networks

• Local Area Network (LAN) Small area network — home, office, school.
• Metropolitan Area Network (MAN) Covers a city.
• Wide Area Network (WAN) Covers large areas — country or world (example: Internet).

Components of a computer network

• Router connects networks
• Switch connects computers within a LAN
• Modem connects to the internet
• Cables/ Wi-Fi used for connection
• Server & Clients provide and use services

Advantages of computer network

• Easy communication
• Saves money (shared devices)
• Share data easily
• Central storage
• Connect anywhere with Wi-Fi

Real life examples

• School computer lab
• Office computers
• Bank ATM network
• Railway booking network
• Online gaming
• Internet (biggest network)