Lesson video

Hi everyone.

My name is Mrs. Jenkins.

I can't wait to learn with you today.

Our lesson today is called, The Internet and World Wide Web.

This is taken from the unit, The Internet.

By the end of today's lesson, you will be able to describe how information is sent between networked devices.

We have three key words we're going to be looking at today, those words we're going to see throughout today's lesson, so it's really helpful to learn what they mean before we get started.

We have the word route, the World Wide Web and services.

So the word route is the path Data follows between computers on a network.

World Wide Web is a service provided via the internet, which allows us to access webpages and other shared files.

Services are things that people can use or access online, such as emails, applications, videos, or online games, which helps make the internet useful.

We'll be looking at these words throughout today's lesson, so let's see if you can spot them.

Remember, the words are route, World Wide Web, and services.

Today's lesson is called the Internet and World Wide Web.

We have two learning cycles in the lesson.

First is to describe how data is routed between networks, and the second is to describe services that run through the internet.

We are going to begin by looking at our learning cycle one.

Describe how data is routed between networks.

A router enables us to connect a network to the internet.

Here we have got a diagram of a network, which is in the circle.

We have a network switch and some com desktop computers connected by cables to the switch.

The switch is also connected to a server by a cable and then to the wider world by a router.

We also have three other networks to the other side, all the same, each connected to a router.

So a router enables us to connect a network to the internet.

It also enables us to connect lots of different networks to together.

So all of these circles, each are a different network.

They're all connected together by routers.

Okay, a little check in now at what enables us to connect a network to the internet, A, computer, B, router, or C, internet.

Have a go.

How did you get on? I asked A, what enables us to connect a network to the internet? A, computer, B, router, or C, internet.

Well done.

The answer is B router.

Our router enables us to connect a network to the internet.

A route is a way of getting from one place to another.

There is often more than one route you could take.

So here we have Sophia and she's looking at the different ways she could get to A, B, and C.

She asks us, "How could I get to C?" What do you think? Sophia asked us, "How could I get to C?" So we could have a look.

She could go three, six, nine to C.

She could also go one, two, five, nine, C or one, four, seven, C.

There are lots of different routes Sophia could take.

The internet is lots of networks connected by routers.

So in the image before where there are routers, we had numbers, but the numbers are representing our routers.

Each router is one of those numbers.

So the internet is lots of networks connected by lots of routers.

When data passes between networks, it passes through many different routers.

To get to see, you could follow this route.

Is there a way with fewer steps? This is another route that could be taken and that only has two steps before you are at C.

Now, sometimes a way might get blocked.

What route could you take to get to A, if five is blocked? Have a little look.

How did you get on? This is one route the data could get, it could take to avoid five.

It could go two, seven, A.

data can travel between two places through many different routes.

This makes the internet very reliable.

True or false? The internet is made up of only one network? How did you get on? I asked you true or false? The internet is made up of only one network? The answer is false, and the reason why the internet is a global system of interconnected computer networks.

Well done.

Data travels from one router to the next until it finds its way to the destination.

A message is split up into small parts.

Each part may take its own route to the destination where they are then put back together like a jigsaw.

Okay, we're going to move on to task A.

There are two parts to task A.

So the first part, we're going to say the numbers represent routers.

Can you find three different routes to get to B? How did you get on? I asked you to find three different routes to get to B? So the three different routes to get to B.

We could have gone two, five, nine to B.

three, six, nine to B.

two, seven, five, nine to B.

But they're not the only route.

You may have thought of many others as well.

Any of them are fine.

Part two, the numbers represent routers.

Answer the following questions.

A, how could you get from three to four? So from route to three to route to four.

How could you get to C without going through router six? What would be the advantage of B having another connection or router.

Okay, have a little go.

How did you get on? I asked you the following questions.

How could you get from three to four? How could you get to C without going through six? And what would be the advantage of B having another connection or router? Okay, so how could we get from three to four? We could go three, two, one, four.

How could you get to C without going through six? We could go two, five, nine, C.

But for both of those answers, there are more routes you might have thought of as well.

These are just one example, but there are lots of different ways you could solve the questions.

The third question, what would be the advantage of B having another connection or router? And that is if the router or connection nine is blocked, there is currently no way to get to B.

So it'd be useful to have another router that allows B to be connected to by another way.

And that goes back to making sure the internet is as reliable as it can be.

Okay, we are going to move on to part two now, which is describe services that run through the internet.

The internet is not just one big network.

It is made up of lots of smaller networks that are all connected.

Networks are a group of connected devices, some of which might help provide a service.

The World Wide Web is just one part of the internet.

It is made up of websites and resources that you can visit using a web browser.

When you use the internet to visit a website, you are using the World Wide Web.

It's like a huge library of information that you can explore.

Okay, we've got a little check here.

True or false? The internet and World Wide Web are the same thing.

True or false? How did you get on? I asked you true or false? The internet and World Wide Web are the same thing.

It's false.

And our reason why the internet is the network of computers that connect everything.

While the World Wide Web is just the websites you visit using a web's browser.

The internet has lots of services like email and games, not just websites.

File sharing is another service that is part of the internet.

File sharing lets you send and receive files like pictures, videos, or homework through the internet.

Emails are another internet service.

Emails are written messages that people send using the internet.

It's like sending a letter, but much faster.

When you send an email, it travels through the internet to reach someone else.

Jun has told us emails are like electronic letters, but we don't need stamps or post offices.

Thank you, Jun.

That's really helpful.

A website is a collection of many webpage under one name, like a book with many chapters.

A web page is just one page within that website.

Okay, so website is the collection of many web pages and a webpage is just one page within the website.

Okay, we've got a little check here at what is a collection of web pages under one name, A, browser, B, network, or C, website.

Have a go.

How did you get on? I asked you, a, what is a collection of web pages under one name? A, browser, B network, or C website? The answer is C website.

A website is a collection of web pages under one name.

Okay, we are going to move on now to task B.

You are going to describe what each of these services does.

Okay, so we have got email, web browser, file sharing, and then we have a question.

What is the difference between services and the internet? Have a go.

How did you get on? I asked you to describe what each of these services does.

Email, web browser, file sharing, and then I ask the question, what is the difference between services and the internet? Here's some of our answers.

So email is a way of sending messages through the internet.

A web browser enables you to visit websites.

File sharing is a way to send and receive files, photos, and videos.

And then what is the difference between services and the internet? Services are specific activities that need the internet to work.

So some of the services we looked at are email, web browser, and file sharing.

Great job everyone.

You have worked so hard in today's lesson.

Well done.

Let's summarise what we have learned.

Data can take many different routes to get to a destination.

When data travels between networks, it passes through many different routers.

The internet provides lots of services including file sharing, email, and the World Wide Web.

The World Wide Web is made up of websites which contain web pages.

You can access them through a web browser.

Great job everyone.

You have worked so hard.

Hope to see you again soon.