Lesson 10 of 10 – Internet
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What is the Internet?

The Internet is a global network that connects billions of computers and devices across the world. It allows people to share information, communicate, learn, work, and use online services.

The Internet uses a standard communication system called TCP/IP to connect devices and transfer data. It is one of the most important inventions of the modern world.

Father of the Internet: Vint Cerf is known as the father of the Internet.

Why is the Internet Called a Network?

The Internet is called a network because it connects many computers, servers, routers, and communication devices together. These connected systems work together to send and receive data from one place to another.

The Internet is the backbone of the World Wide Web. Websites, online apps, emails, videos, and social media all work through the Internet.

How Does the Internet Work?

Client

A client is the device used by a person, such as a computer, laptop, tablet, or smartphone. The client sends a request to access data or a website.

Server

A server is a powerful computer that stores websites, files, and online data. It receives requests from clients and sends the required information back.

Data Transfer

When a user opens a website, the client sends a request through the Internet. The server responds with the requested data, and the web page appears on the screen.

Uses of the Internet

  • Social media
  • Online shopping
  • Online gaming
  • Job searching
  • Communication
  • Online learning
  • Video streaming
  • Banking and online payments

Ways to Connect to the Internet

  • Dial-up
  • Broadband
  • Wi-Fi
  • Mobile Internet

Internet Protocols

TCP/IP

TCP/IP stands for Transmission Control Protocol / Internet Protocol. It breaks data into packets and sends them from source to destination in a proper order.

FTP (File Transfer Protocol)

FTP is used to transfer files between computers over a network. It is often used for uploading and downloading files.

HTTP (HyperText Transfer Protocol)

HTTP is used by web browsers to load and display web pages from websites.

Advantages of the Internet

  • Instant communication
  • Access to online services
  • Work from home
  • Access to information anytime
  • Online education and learning

Disadvantages of the Internet

  • Time waste
  • Cyber crimes
  • Health issues
  • Privacy risks
  • Fake information and scams
💡 Remember
The Internet is a powerful global network that connects people, devices, and services around the world. It is useful, but it should be used carefully and safely.

🧠 Final Quiz

Who is known as the Father of the Internet?