Networking lesson 4

• Computing
• Upper Secondary (Key Stage 4)
• Lower Secondary (Key Stage 3)

Networking lesson 4

Do now: What is the internet?
What can it be used for (give two examples)?

Lesson 4: The internet

Conquer: Define what the internet is.

Aspire: Explain how data travels between computers across the internet

The internet explained

Watch the video:

Click here

Whilst watching, keep thinking about the starter questions.

What is the internet?

What do we use it for?

The internet explained 

• The internet is a worldwide network of computers.
  

• It is the physical hardware, i.e. the cables, the routers, and other pieces of hardware used to connect devices together.
  

• Any device connected to the internet is part of this network, for example:
  
• Laptops
  
• Games consoles
  
• PCs
  
• Tablets
  
• Mobile phones
  
• 
  

Who owns the internet

1. The government
2. No one
3. Vinton Gray
4. Google

Which of the following is NOT an internet activity?

1. Playing online games
2. Checking Instagram
3. Sending an email to a friend
4. Creating a local Microsoft PowerPoint presentation

What is the internet?

1. A set of rules to allow communication
2. A worldwide network of computers
3. A gateway on a network
4. A single network

Data transmission across continents

We now know that the internet is a global network of networks.

How could we connect
networks together to
different countries?

We use undersea cables.
Name 2 countries that are connected by ‘Amitie’. How long is the cable?

Click here

http://www.submarinecablemap.com

Interesting facts

• The first oceanic cable was laid in 1851 to connect telephones.
• 99% of internet data is transmitted through cables under the oceans
• Oceanic cables can be damaged by anchors, trawling fishing nets, and even shark bites!

IP Address 

To send data via these cables we need somwhere to send it. 

An IP address is made up of 4 groups of numbers between 0 and 255, each separated by a full stop.

These are unique for every device on the internet.

IP Address 

An IP address is just like your house address, except instead of receiving mail you receive data to your device. 

Example:

• 192.168.5.43
• 255.54.2.27

You can find your own IP using google.
Search "What is my IP" into google
Enter it below.

Which of the following best describes the structure of an IP address?

1. 4 numbers between 0 and 100, separated by dots
2. 4 numbers between 0 and 255, separated by dots
3. 3 numbers between 0 and 255, separated by dots
4. 4 numbers between 0 and 255, separated by dashes

When was the first undersea cable placed?

1. 1999
2. 1951
3. 1899
4. 1851