[Day 1] 3. Types of Networks

Networking involves connecting different devices to share data and resources. Below are various types of networks, explained with examples:

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1. Metropolitan Area Network (MAN)

• What it is: A network that covers a small town or city.
• Example: Cable TV networks that connect multiple households within a city.
• Key Feature: Larger than a LAN but smaller than a WAN.

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2. Campus Area Network (CAN)

• What it is: A network spanning a campus, school, or company.
• Example: The Sunbeam Campus Network that connects classrooms, labs, and offices.
• Key Feature: Limited to a specific area like a university or company campus.

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3. Personal Area Network (PAN)

• What it is: A small network for personal devices within close range.
• Example: Using Bluetooth or Wi-Fi to connect your phone, smartwatch, and laptop.
• Key Feature: Short-range communication, usually within a few meters.

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4. Virtual Private Network (VPN)

• What it is: A secure network that uses the public internet to transfer data globally.
• Example: Employees accessing a company's internal network securely while working remotely.
• Key Feature: Encrypts data for privacy and security.

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5. Wide Area Network (WAN)

• What it is: A network that covers large geographical areas, often using services provided by telecom companies.
• Example: Internet connections through SIM cards or leased lines.
• Key Feature: Connects multiple LANs or MANs across cities or countries.

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6. Server Area Network (SAN)

• What it is: A network focusing on the physical security of servers and their environment.
• Example: High-security areas in data centers with restricted access.
• Key Feature: Ensures servers are in a controlled and secure environment.

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7. Storage Area Network (SAN)

• What it is: A specialized high-speed network for storage devices.
• Example: Enterprise-level data storage systems used for backups and large-scale data handling.
• Key Feature: High performance and dedicated storage solutions for businesses.

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8. Galaxy Area Network (GAN)

• What it is: A futuristic network for satellite connectivity in outer space.
• Example: Current satellite communication systems, such as SpaceX's Starlink, are early implementations of GAN.
• Key Feature: Envisions seamless connectivity even in space.

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9. Local Area Network (LAN)

• What it is: A network where all connections and devices are managed by the owner.
• Example: Home networks with a router connecting your PC, phone, and TV.
• Key Feature: Small area coverage, typically within a building.

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