New
New
Year 11
AQA

How data travels across the internet

I can explain how the components of the World Wide Web work together to display webpages.

New
New
Year 11
AQA

How data travels across the internet

I can explain how the components of the World Wide Web work together to display webpages.

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Lesson details

Key learning points

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

Keywords

  • 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 misconception

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

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.


To help you plan your year 11 computer science lesson on: How data travels across the internet, download all teaching resources for free and adapt to suit your pupils' needs...

Use a classroom activity with envelopes as "packets" sent by different routes to illustrate packet switching. This helps learners visualise how data is split, travels separately, and is reassembled at the destination.
Teacher tip

Equipment

Licence

This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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Prior knowledge starter quiz

Download quiz pdf

6 Questions

Q1.
What does WWW stand for?

Correct Answer: World Wide Web

Q2.
Which of the following is a service provided by the internet?

sending letters by post
Correct answer: browsing webpages
charging devices
printing documents

Q3.
How do users typically access the World Wide Web?

by typing commands into a printer
by using a television remote
by calling a phone number
Correct answer: by using a web browser

Q4.
Which statement is true about the internet and the World Wide Web?

They are exactly the same thing.
Correct answer: The World Wide Web is a service that runs on the internet.
The internet is a service provided by the World Wide Web.
Only businesses use the internet.

Q5.
Match each term to its meaning:

Correct Answer:internet,a global system of connected networks

a global system of connected networks

Correct Answer:World Wide Web,a service for accessing and navigating webpages

a service for accessing and navigating webpages

Correct Answer:web browser,a program used to view webpages

a program used to view webpages

Correct Answer:hyperlink,a clickable link between webpages

a clickable link between webpages

Q6.
Put these steps in order for accessing a website:

1 - Open a web browser.
2 - Enter the web address (URL).
3 - The browser requests the webpage from a web server.
4 - The webpage loads on your screen.

Assessment exit quiz

Download quiz pdf

6 Questions

Q1.
Which component allows you to view webpages on the World Wide Web?

Correct answer: web browser
printer
spreadsheet
scanner

Q2.
What is the main function of a web server?

to print documents
to play music
to scan for viruses
Correct answer: to store and deliver webpages to users

Q3.
What does DNS stand for?

Correct Answer: domain name system

Q4.
What is a data packet?

a whole file sent at once
a type of webpage
Correct answer: a small part of a file sent across a network
a web browser

Q5.
What is the method that sends data across the internet by splitting it into small parts that may take different routes?

Correct Answer: packet switching

Q6.
Put these steps in order to show how data from a website is delivered to your device using the internet:

1 - The website data is split into small packets.
2 - Each packet is sent across the internet.
3 - Packets may travel along different routes to avoid busy parts of the network.
4 - The packets arrive at your device.
5 - The packets are reassembled to display the correct webpage.