The internet, the web and how a page is retrieved
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The teaching part (1 min) is free to watch. A free account opens the whole lecture: 7 practice questions, 2 real past-paper questions with the answers explained, the mistakes that lose marks, the full-marks tip, a one-card summary and a quick quiz.
What this lecture covers
- You type a name, a page appears
- The internet
- The World Wide Web
- Internet against web
Read the transcript of the teaching part
Last time
Before we start: last time, in Integrated development environments (IDEs), you learned these points. Here they are again on one card. Keep them in mind, because today builds on them.
You type a name, a page appears
You type a website name, and in less than a second a page appears from a computer on the other side of the world. People say internet and web as if they were the same thing. They are not. In this lesson we separate them, and follow one page all the way to your screen.
The internet
The internet is a very large global network of interconnected networks. It is the infrastructure: routers, cables, servers and computers. It carries many services, such as email, video calls and file sharing.
The World Wide Web
The World Wide Web is a collection of web pages and websites. The pages are written in HTML, and linked together by hyperlinks. You view them with a web browser, using the internet to reach them. So the web is one service that runs on the internet.
Internet against web
The internet is the network, the hardware. The web is the collection of pages that is accessed using the internet. Email uses the internet too, but it is not part of the web.
How often it comes up
The whole chapter: The Internet and the World Wide Web.
Chapter 5.1: The internet and the web
- The internet, the web and how a page is retrieved 7 min
Also for IGCSE Computer Science 0478
Which topics come up most in IGCSE Computer Science 0478 past papers, counted from every paper since 2004: Paper 1 topic frequency, Paper 2 topic frequency.