Discover the global network that powers our digital world
Definition
The Internet is a vast global network that connects millions of private, public, academic, business, and government networks. It enables communication, data transfer, and services like web browsing, email, and streaming.
How the Internet Works
The internet operates by transmitting data in small units called packets. These packets travel over various interconnected networks using a system of routers and servers.
Data is broken into packets
Packets travel via routers
Servers process and forward requests
Response packets are reassembled at the destination
Protocols That Power the Internet
Key protocols include:
IP (Internet Protocol): Assigns addresses to devices and routes packets.
TCP (Transmission Control Protocol): Ensures packets arrive correctly and in order.
HTTP/HTTPS: Used for transferring web pages securely.
DNS (Domain Name System): Converts domain names into IP addresses.
Common Internet Uses
Browsing websites
Using social media
Video and audio streaming
Email and instant messaging
Cloud storage and computing
Accessing the Internet
Internet access is provided by Internet Service Providers (ISPs) using technologies such as DSL, cable, fiber optics, satellite, and mobile data (4G/5G). Devices connect via Wi-Fi or Ethernet.
Security and Privacy
As the internet is open and global, security is essential. Tools such as firewalls, encryption, antivirus software, and VPNs help protect users from cyber threats like hacking, malware, and phishing.
Example: When you type a URL like www.google.com, your device sends a request to a DNS server, resolves the IP, and connects to Google's servers to fetch the page.