Introduction to Computer Networking

• Resource Sharing: Devices such as printers and scanners can be shared among multiple systems, reducing costs.
• Data Sharing: Teams can collaborate on shared documents and applications, enhancing efficiency.
• Communication: Networks enable various forms of communication, including email, video calls, and instant messaging.
• Remote Access: Users can access data and applications from different locations, supporting remote work.

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Types of Computer Networks

1. Local Area Network (LAN): Covers a small geographic area, such as a home or office. It allows high-speed data transfer and resource sharing among connected devices.
2. Wide Area Network (WAN): Spans a large geographic area, connecting multiple LANs. The Internet is the largest example of a WAN.
3. Metropolitan Area Network (MAN): Covers a city or a large campus, providing connectivity for multiple LANs within that area.

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Networking Protocols

• TCP/IP: The foundational protocol suite for the Internet, enabling reliable data transmission.
• HTTP/HTTPS: Protocols for transferring web pages and secure communication over the Internet.
• FTP: Used for transferring files between computers on a network.

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OSI and TCP/IP Models

• OSI Model: Consists of seven layers, from physical transmission to application-level interactions.
• TCP/IP Model: A more simplified model with four layers, focusing on the protocols used in the Internet.

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Conclusion