Lesson video

Hi everyone.

My name is Mrs. Jenkins.

I can't wait to learn with you today.

Welcome to today's lesson, Transferring information between digital devices, taken from the unit Computer networks.

By the end of today's lesson, you'll be able to explain how digital devices can be connected.

In today's lesson, we have three keywords or phrases.

It's really important that we know the meaning of some of these words before we start our learning, so that our learning makes more sense.

Our three words or phrases are server, wireless access point, and network.

A server is a networked computer that manages, stores and provides data, such as files to other computers.

A wireless access point is a network device that allows wireless computing devices to connect to a wired network.

And a network is a group of interconnected computing devices.

So those three keywords or phrases are: server, wireless access point, and network.

Keep an eye out for them throughout today's lesson.

In today's lesson, Transferring information between devices, we have two learning cycles: identify how devices pass data, and explain the roles of different network devices.

Now, we're gonna begin our lesson with identify how devices pass data.

Let's get started.

Aisha's asked us, "What is a connection?" Great question.

A connection is the link between people, places, or things that allows them to share or communicate.

What she's now asking is, "What is a network?" Okay, a network is a group of connected people or things that can work together or share things with each other.

So remember, a network is one of our keywords.

Data can be shared between devices on a network, like sending a message from one computer to another.

So Sofia says, "How does the data travel?" Data travels as signals through wired or wireless connections.

Great question, Jacob.

He asks us, "What is a data packet?" A data packet is a small piece of data sent between devices.

Data is split into data packets for transmission between computers.

It can be too slow and unreliable to send large files all at once, so the data is split into smaller packets that travel separately and then put back together at the end.

Great question, Sofia.

She has asked us, "What happens if one packet gets lost?" If one packet is lost, the network asks for it again.

This makes sure the full message can still be rebuilt correctly.

True or false, a network always needs the internet to work? Have a go.

How did you get on? I asked you, true or false, a network always needs the internet to work? The answer is false, and the reason why, a network can share data between other computers without being connected to the internet.

Jacob says, "What data do devices share?" Devices share data such as files, websites, and games.

Great question, Jacob.

He wants to know what are the ways that devices can connect to other devices? There are different ways that devices can connect, through a wire or an ethernet cable, through wifi, Bluetooth, and mobile networks.

Which of these is a way data can be shared, A, through paper, B, through a wire, C, talking to a friend, or D, using a network? Have a go.

How did you get on? I asked you which of these is a way data can be shared? A, with paper, B, through a wire, C, talking to a friend, or D, using a network.

Data can be shared through a wire or using a network.

Great job everyone.

We are going to move on to our first task now.

I would like you to fill in the blanks.

A device sends data through a hmm, so that it can join the network.

The data is split into small pieces called hmm.

These pieces travel through a hmm which sends them to the right place.

A hmm stores the data and sends it back when the device asks for it.

Have a go.

How did you get on? I asked you to fill in the blanks.

A device sends data through a mm so that it can join the network.

The data is split into small pieces called mm.

These pieces travel through a mm, which sends them to the right place.

A mm stores the data and sends it back when the device asks for it.

So let's look at the answers.

A device sends data through a wireless access point so that it can join the network.

The data is split into small pieces called packets.

These pieces travel through a network switch, which sends them to the right place.

A server stores the data and sends it back when the device asks for it.

Great job everyone.

Well done.

We're going to move on to our second learning cycle now, which is explain the role of devices in a computer network.

Sofia asks, "What are networks made up of?" Jacob's got a good response.

"Networks are made up of different parts which help data move, including network switches, servers, and wireless access points." This is a network switch.

A switch manages connections.

It provides a central connection point for multiple devices.

This is a server.

It is a powerful computer that stores files and send them when they are requested by another network device.

Which device stores files in a network? A, a switch, B, a server, C, a tablet, or D, a mouse? Have a go.

How did you get on? I asked you, which device stores files in a network, A, a switch, B, a server, C, a tablet, or D, a mouse? The answer is B, a server.

Great job.

This is a wireless access point.

It is a network device that allows wireless computing devices, so laptops and tablets, to connect to the wired network.

Wireless devices can sometimes talk directly, like two phones using Bluetooth.

To connect to a network, they usually need a wireless access point, which lets talk to the switch and the server.

The wireless access point, switch and server all work together in a network.

So here we can see the network switch connected both to the wireless access point and to the server.

By connecting it to the wireless access point with a wire, the wireless access point can then allow other devices to connect to it wirelessly.

Which device connects wireless devices to the rest of the network? A, a switch, B, server, C, a wireless access point, or D, a laptop? Have a go.

How did you get on? I asked you which device connects wireless devices to the rest of the network? A, a switch, B, a server, C, a wireless access point, or D, a laptop? The answer was C, a wireless access point connects wireless devices to the rest of the network.

Great job everyone.

We're going to move on to task B now.

Here is a simple network.

I would like you to label each device and write a short sentence for each part.

What does it do? Have a go.

How did you get on? I showed you a simple network.

I have asked you to label each device and write a short sentence for each part.

What does it do? So we have the tablet that sends the request, the wireless access point sends the request to the switch, the switch sends the request to the server, and the server finds and sends back the file, which goes through the switch, through the wireless access point, and arrives back at the tablet.

Great job everyone.

You have worked so hard today.

Let's summarise our learning from today's lesson.

Data travels as signals through wired or wireless connections.

A data packet is a small piece of data sent between devices.

Data is split into data packets for transmission between computers.

Networks are made up of different parts that help data move, including network switches, servers, and wireless access points.

Each part of the network has a different but important role.

Great job everyone.

You've worked so hard in today's lesson.

Well done.

I hope to learn with you all again soon.