Answer:
Explanation:
when you chat to somebody on the Net or send them an e-mail, do you ever stop to think how many different computers you are using in the process? There's the computer on your own desk, of course, and another one at the other end where the other person is sitting, ready to communicate with you. But in between your two machines, making communication between them possible, there are probably about a dozen other computers bridging the gap. Collectively, all the world's linked-up computers are called the Internet. How do they talk to one another? Let's take a closer look! Photo: What most of us think of as the Internet—Google, eBay, and all the rest of it—is actually the World Wide Web. The Internet is the underlying telecommunication network that makes the Web possible. If you use broadband, your computer is probably connected to the Internet all the time it's on.
Contents
What is the Internet?
What does the Internet do?
How does Internet data move?
How packet switching works
What are "clients" and "servers"?
How the Net really works: TCP/IP and DNS
A brief history of the Internet
Find out more
What is the Internet?
Global communication is easy now thanks to an intricately linked worldwide computer network that we call the Internet. In less than 20 years, the Internet has expanded to link up around 230 different nations. Even some of the world's poorest developing nations are now connected. Bar chart showing total number of countries online between 1988 and 2017
Chart: Countries online: In just over a decade, between 1988 and 2000, virtually every country in the world went online. Although most countries are now "wired," that doesn't mean everyone is online in all those countries, as you can see from the next chart, below. Source: Redrawn by Explainthatstuff.com using data from ITU World Telecommunication Development Report: Access Indicators for the Information Society: Summary, 2003 (blue bars, 1998–2003) and Percentage of Individuals using the Internet 2000–2019 [XLS
