Network 1

​Computer Networks

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Recap: What is a network?

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Understand how data can be sent over a network.

understand how packets are used in a network and the benefit of using them.​

​Aims

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A device used to give something back from the computer out to the user.

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Monitor, speaker, printer ​

​Output

A device used to enter data into a computer.

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Keyboard, mouse, microphone ​

​Input

​Types of devices

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Multiple Choice

An input device let the user....

• See data from the computer

• Enter data into the computer

• Listen to music

• Save their work

Multiple Choice

A speaker is an...

• Input device

• Output device

​Networks

​Definition

A computer network is 2 or more devices, connected to each other, to share information and resources.​

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Devices on a network can share information.

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They can also share resources such as printers.​

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​Sharing

​LAN - Local Area Network

A network that covers a small area such as your house or a school building is classed as a LAN.

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Everything is in 1 place and it is owned by the same people.​

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Multiple Choice

A Network is...

• 1 computer that can share information with itself

• 2 computers that are not connected

• 2 or more computers connected that share information

• A printer

​WAN - Wide Area Network

A network that covers are larger area.

This could be across multiple ​homes and buildings.

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Mr Lone will show you an example now.​

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Multiple Choice

A WAN covers a small area

• True

• False

Multiple Choice

A WAN can be made up of multiple LANs

• True

• False

​The Internet

Defintion

A Global computer network.

Allows for communication on a global scale.​

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​Internet

In order for devices to communicate they must be connected via cables.

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This needs to happen on a global scale.​

https://www.youtube.com/watch?v=0TZwiUwZwIE

https://www.submarinecablemap.com/​

​The Internet

It is a collection of networks, connected with underground cables.

This is on a global scale to connect countries to each other.

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Multiple Choice

Internet cables are laid under the sea.

• True

• False

Multiple Choice

Internet cables are laid under ground.

• True

• False

Multiple Choice

Internet cables are laid in the sky.

• True

• False

​Moving information

Computers are connected to each other.

This can be when they are close to each other.

Or when they are far apart.

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But how does data actually travel in cables?????​

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​Data Packets

https://www.youtube.com/watch?v=AYdF7b3nMto

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​Data Packets

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Multiple Choice

Packets are sent and find the...

• Slowest route

• Fastest route

• Longest route

• Shortest route

Multiple Choice

When the packets arrive at the computer they...

• Are put in the bin

• Are saved on the computer so they user can see it later

• Are sent back to the sender

• Are reassembled back to the original file

Task

What needs to be on your Presentation:

Subject | Subject

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​Slide 1 –

What’s a Network? Clear definition

Benefits of using a network​

​Slide 2 –

What's a LAN? Clear Definition

Example of a LAN​

​Slide 3 –

What’s a WAN? Clear Definition

Example of a WAN​

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​Slide 4 –

What is the Internet? Clear Definition

Where are the cables laid? Why are they needed?

How does data travel across the Internet?