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Year 11 - Computing

How data travels across the internet

The internet and web technologies

Unit Summary

In this unit pupils will explore how data travels across the internet. They will explore how protocols define communication between devices and the purpose of common network protocols. They will investigate the risks to networks and the methods that can be used to protect a network.

Lesson Summary

You will learn to explain how the components of the World Wide Web work together to display webpages.

Key Notes

  • The World Wide Web (WWW) relies on web browsers, web servers, and webpages to deliver information and services.
  • Explain how the internet uses packets to efficiently and reliably transmit data across networks.

Vocabulary To Learn

  • domain name system (DNS): servers that work together to match domain names to the stored location of the webpage
  • data packet: a small part of a whole file that is transmitted over a network
  • packet switching: a method of transmitting data across the internet using small packets of data

Common Mistakes To Avoid

  • All the data from a website travels together in one file and always takes the same route through the internet to reach your device.

3 Quick Questions (With Answers)

1. Describe the system or process from this lesson in clear steps.

The World Wide Web (WWW) relies on web browsers, web servers, and webpages to deliver information and services. Explain how the internet uses packets to efficiently and reliably transmit data across networks.

2. Define this computing term and give one practical example. 'domain name system (DNS)'

servers that work together to match domain names to the stored location of the webpage. Add one real device or system example to prove understanding.

3. Correct this common computing misconception.

Mistake: All the data from a website travels together in one file and always takes the same route through the internet to reach your device. Correction: Data is broken into packets, and each packet may take a different route. This makes transmission faster and more reliable, because the network can avoid delays or busy routes.

More Lessons In This Unit

Browse all guides in the Year 11 Computing guide library.