This document provides a lesson on how the internet works. It explains that the internet is a network of networks that connects computers around the world using common protocols like TCP/IP and HTTP. Students will learn about how routers guide data packets along the quickest route between networks and how IP addresses and domain name servers allow devices to communicate on the internet. The lesson includes activities for students to diagram the structure of the internet and trace the path a website request takes to reach its server.

1. Internet

2. Starter Activity: Any idea what this is?
Internet

3. In this lesson you will learn about Internet. You
will create a diagram to illustrate the Internet,
think like a router to take the most efficient path
to a destination and trace the path of a website.
Lesson
Objectives
 Understand how the Internet works
 Be able to explain the protocols TCP/IP and HTTP
 Be able to describe the role of a router
 Be able to explain the role of an IP address
Internet

4. Watch the Internet video, this will show you how
the Internet works in 5 minutes.
Internet

5. The Internet is:
•A network of networks
•It connects millions of computers from around the
world and allows them to communicate
•Data is transmitted from one computer to another
using telephone systems and satellites
•Computers use common languages so they can
communicate. There are called protocols.
Internet

6. Task ??: Internet Diagram
Using clipart images create a diagram to illustrate
how the Internet works.
Internet

7. Protocols
HTTP is the first part of a web address – it stands
for HyperText Transfer Protocol and is used to
request and deliver web pages.
TCP/IP stands for Transmission Control
Protocol/Internet Protocol it allows computers and
servers to communicate with each other across the
Internet.
Internet

8. Broadband Router
•Broadband allows fast download speeds and is
permanently connected
•>4Mbit/sec is considered to be broadband
•A broadband router allows computers to connect
to the Internet through a telephone line
•They guide data packets around the Internet
through the quickest route
•Some broadband routers have a wireless access
point to allow wireless Internet access
Internet

9. Broadband Router
Internet

10. Task ??: Think like a Router!
The one way system in school is established to help
students and staff move around the school
efficiently. What route would you go if you have to
take a message from this classroom to the main
office as quickly as possible when:
1.All lessons are taking place
2.All students are moving between lessons
3.Its dinner time the corridors are empty of
students
Internet

11. IP Address
Every computer and router on the Internet has a
unique IP (internet protocol) address.
It is made from a series of numbers separated by
dots like: 217.27.240.45
Special servers called DNS (domain name server)
servers link IP addresses to website names.
www.cardinalallen.co.uk -78.129.153.81
Internet

12. Task ??: Trace the path to a website
1.Go to: http://www.yougetsignal.com/tools/visual-tracert/
2.Use the tracecert tool (proxy trace) to find out:
– How may routers did your request pass through before
reaching the server where the disney.com website is
hosted
– Where is the physical located on the server
– How many miles did your request travel
– How long did your request take to reach the server
– How many routers did your request pass through in
Great Britain
Internet

13. Task ??: Internet Diagram Annotation
Annotate your diagram to explain how the
Internet works.
Internet

14. Plenary: Postcard
Using a maximum of four lines at font size 20
summarise what you have learnt in this lesson. Be
ready to feedback what you have written to the
rest of the class.
Internet

15. Keywords
 Be able to the explain how the Internet works
 Be able to explain the protocols TCP/IP and HTTP
 Be able to describe the role of a router
 Be able to explain the role of an IP address
Objectives
 Internet
 Network
 Broadband
 Protocol
 HTTP
 TCP/IP
 Router
 IP Address




Internet