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The Internet: The Global Internet and how it works

by Jc Reardon
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Current price ₹1,617.00
Original price ₹1,776.00
Original price ₹1,776.00
Original price ₹1,776.00
(-9%)
₹1,617.00
Current price ₹1,617.00

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Book cover type: Paperback
  • ISBN13: 9798312361896
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Independently Published
  • Publisher Imprint: Independently Published
  • Publication Date:
  • Pages: 308
  • Original Price: USD 19.95
  • Language: English
  • Edition: N/A
  • Item Weight: 413 grams
  • BISAC Subject(s): Electronic Commerce

1. What is the Internet?
The Internet is a vast system of networks linked together using the Internet Protocol (IP). It enables communication between billions of devices worldwide, from personal computers and smartphones to servers and smart appliances.
It is often confused with the World Wide Web (WWW), but the web is just one part of the Internet. The Internet also includes:

  • Email (SMTP, IMAP, POP3)
  • File transfers (FTP, P2P)
  • Voice & video calls (VoIP)
  • Cloud services
  • Online gaming

2. How Does the Internet Work?
The Internet functions through a combination of hardware, software, and protocols that allow devices to communicate.
Step 1: Devices Connect to the Internet

  • Your device (computer, phone, or tablet) connects via Wi-Fi, Ethernet, or mobile networks.
  • It communicates with an Internet Service Provider (ISP), which provides access to the broader Internet.
Step 2: Data Travels Through Networks
When you request a website (e.g., google.com):
  1. Your device sends a request to your ISP.
  2. The request travels through routers and servers across the Internet.
  3. The request reaches the web server hosting the website.
  4. The server sends the requested web page back to your device.
Step 3: Communication via Protocols
The Internet works because of standard communication rules called protocols:
  • IP (Internet Protocol) - Assigns unique addresses to devices.
  • TCP (Transmission Control Protocol) - Ensures reliable data transmission.
  • HTTP/HTTPS (Hypertext Transfer Protocol) - Transfers web pages.
  • DNS (Domain Name System) - Converts website names (e.g., google.com) into IP addresses.

3. Key Components of the Internet
1. Servers & Clients

  • Clients (your device) request information.
  • Servers store and provide the requested data.
2. Routers & Switches
  • Routers direct data between networks.
  • Switches connect multiple devices in a local network.
3. Data Centers
  • Large facilities store and process vast amounts of Internet data.
  • Cloud services (Google Drive, Dropbox) use data centers.
4. Submarine Cables & Satellites
  • Most Internet data travels through undersea fiber-optic cables.
  • Satellites (e.g., Starlink) provide Internet to remote areas.

4. How Do Websites Work?

  1. You type "www.google.com" in your browser.
  2. Your browser contacts a DNS server to find Google's IP address.
  3. Your request is sent over the Internet to Google's web server.
  4. The web server processes the request and sends back the web page.
  5. Your browser displays the page.

5. Internet Speed & Connectivity
Factors Affecting Internet Speed

  • Bandwidth - The amount of data transmitted per second (Mbps/Gbps).
  • Latency - The delay in data transmission (ping time).
  • Network Congestion - More users on a network slow it down.
Types of Internet Connections
  • Fiber-optic - Fastest and most reliable.
  • Cable - Common in homes, decent speeds.
  • DSL - Slower, uses phone lines.
  • Satellite - Used in remote areas.
  • Mobile (4G/5G) - Wireless but varies in speed.

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