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💻 What is a Computer Network? – Definition, Types, Components & FAQs for Students
📌 Definition of a Computer Network
A computer network is a group of two or more computers connected together to share resources (like files, internet, printers, etc.) and communicate with each other.
In simple terms:
A network is like a group of friends connected so they can talk, share stuff, or play games together.
🧱 Components of a Computer Network
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Nodes – Devices like computers, printers, smartphones
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Cables/Wireless – The medium through which devices are connected
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Network Interface Card (NIC) – Hardware that connects a computer to a network
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Router – Connects multiple networks and directs data
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Switch – Connects multiple devices within the same network
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Modem – Connects your network to the internet
🧩 Types of Computer Networks
| Type | Description | Example |
|---|---|---|
| LAN (Local Area Network) | Connects computers within a small area like a home, school, or office | School Computer Lab |
| WAN (Wide Area Network) | Covers a large geographical area, connects multiple LANs | The Internet |
| MAN (Metropolitan Area Network) | Covers a city or large campus | City-wide Wi-Fi Network |
| PAN (Personal Area Network) | Small network used for personal devices | Bluetooth connection between phone and laptop |
| WLAN (Wireless LAN) | LAN using Wi-Fi instead of cables | Home Wi-Fi Network |
🌐 Wired vs Wireless Networks
| Feature | Wired | Wireless |
|---|---|---|
| Speed | Generally faster | May be slower |
| Mobility | Limited | High mobility |
| Setup | Requires cables | Easier setup, no cables |
| Examples | Ethernet | Wi-Fi, Bluetooth |
📘 Real-Life Examples of Computer Networks
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Home Wi-Fi – Connects phones, laptops, TVs
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School Network – Connects classroom computers to printers and servers
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Bank Network – Connects ATMs to the main banking system
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Office Network – Employees share files and printers
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Internet – The largest computer network in the world
🤔 FAQs for Students
Q1. What is the purpose of a computer network?
To share information, files, software, and hardware like printers or internet connections.
Q2. What is the difference between LAN and WAN?
LAN is for small areas like a school; WAN is for large areas like cities or countries.
Q3. What is Wi-Fi?
Wi-Fi is a technology that allows devices to connect to a network wirelessly using radio waves.
Q4. Can smartphones be part of a network?
Yes! Smartphones can connect to networks using Wi-Fi, mobile data, or Bluetooth.
Q5. Is the Internet a network?
Yes, the Internet is the largest network that connects millions of devices worldwide.
📝 Summary
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A computer network connects devices to share data and resources.
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Common types include LAN, WAN, MAN, and PAN.
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Networks can be wired or wireless depending on how devices are connected.
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Understanding networks helps you better use technology in school, at home, and beyond.
