# Networking Lesson 3

Networking Lesson 3
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Slide 1: Tekstslide
ComputingLower Secondary (Key Stage 3)

In deze les zitten 24 slides, met interactieve quizzen en tekstslides.

Lesduur is: 50 min

## Onderdelen in deze les

Networking Lesson 3

#### Slide 1 -Tekstslide

Do Now:
Question 1: Explain the purpose of a network cable.
Question 2: Identify the advantage of using a hub in a network

#### Slide 2 -Open vraag

Lesson 2: Computer networks
Conquer: Compare wired to wireless connections and list examples of specific technologies.

Aspire: Define ‘bandwidth’, using the appropriate units for measuring the rate at which data is transmitted.

#### Slide 3 -Tekstslide

Wired and wireless data transmission
Wired and wireless data transmission

• Wired networks send data along cables.

• Wireless networks send data through the air using radio waves.

#### Slide 4 -Tekstslide

Do you know any names of wireless technologies?

#### Slide 5 -Open vraag

Wireless technologies
Popular examples of wireless technologies are:
• Bluetooth
• WiFi
• 3G (third generation wireless mobile)
• 4G (fourth generation wireless mobile)
• 5G(Fifth generation wireless mobile)

#### Slide 6 -Tekstslide

Look at the image of the living room and the devices within it. Identify if the devices are connected to the network through wires or wirelessly.

Wireless
Wireless
Wired
Wireless

#### Slide 7 -Sleepvraag

Bandwidth
• Bandwidth is the amount of data that can be moved from one point to another in a given time. Higher bandwidth = more data per second

• The greater your bandwidth the more devices you can have connected at the same time.

• Netflix would use a high amount of Bandwith while reading the school website would use a small amount.

#### Slide 8 -Tekstslide

How much Bandwith would the following activity use?
A
Light
B
Medium
C
High

#### Slide 9 -Quizvraag

How much Bandwith would the following use?

A
Light
B
Medium
C
High

#### Slide 10 -Quizvraag

How much Bandwith would the following use?

Using social media
A
Light
B
Medium
C
High

#### Slide 11 -Quizvraag

Which waves do wireless networks use to send data?
A
Infrared
B
Gamma
C
D
X-ray

#### Slide 12 -Quizvraag

Measuring bandwidth
• Bandwidth is measured in bits per second.

• Data transfer rates are now so good that bandwidth is usually measured in Megabits per second (Mbps)

#### Slide 13 -Tekstslide

Which do you think has the highest bandwidth?
A
4G
B
3G
C
Bluetooth
D
5G

#### Slide 14 -Quizvraag

Bandwidth compared
• 3G: 3 Mbps
• 4G: 20 Mbps

#### Slide 15 -Tekstslide

Why might this be the case?

#### Slide 16 -Open vraag

• Internet service providers (ISPs) configure our connection based on the most popular activities.

#### Slide 17 -Tekstslide

Test the performance of the schools connection.

#### Slide 18 -Open vraag

Research the minimum internet speeds required for these activities!
Streaming a film
Playing online games

#### Slide 19 -Open vraag

What does this symbol mean?

#### Slide 20 -Woordweb

• Data is arriving at your device at a rate that is slower than it is being processed.
• Example: when you are watching a film on Netflix and it pauses, and you have to wait for a period of time before it starts again

#### Slide 21 -Tekstslide

Wired versus wireless
We know that a network can be wired or wireless

#### Slide 22 -Tekstslide

Wired networks
Faster connection (little to no interference)

Higher bandwidth

More expensive.

time-consuming, each device needs cables

#### Slide 23 -Sleepvraag

Wireless networks