Starter quiz
- Which of the following is a reason why protocols are important in computer networks?
- They make data travel faster.
- They ensure data is sent to the correct device in the correct format. ✓
- They prevent users from making mistakes.
- They allow devices to connect to any network in the world.
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- Which of the following is a valid IP address format?
- 192.168.25.1 ✓
- 192-168-25-1
- 192.168.25
- 192.168.25.256
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- Which of the following is an example of a rule used for email addresses?
- the requirement for an "@" symbol in an email address ✓
- the use of a password to protect an email account
- the ability to attach files to an email
- the option to forward an email to someone else
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- What could happen if an email is sent without a valid email address?
- The email will be delivered to everyone on the network.
- The email will be delivered to the sender's inbox.
- The email will not be delivered, and the sender might receive an error message. ✓
- The email will be delivered to a random person.
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- What could happen if a website address doesn't follow the correct protocol and is missing http:// or https://?
- The web page might not load correctly. ✓
- The website will be slower to load.
- The user will be unable to access the internet.
- The user's computer might be infected with a virus.
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- What is the main difference between http:// and https:// in a website address?
- https:// is used for secure email addresses.
- https:// indicates a secure connection between your browser and a website. ✓
- https:// is used for websites with images and videos.
- There is no difference.
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Exit quiz
- If you want a more secure and stable connection for online gaming, what would you use?
- wireless connection
- wired connection ✓
- Bluetooth connection
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- What does it mean when an online video is "buffering"?
- The video is being downloaded too quickly.
- The video is being processed too slowly.
- There is not enough bandwidth when connecting to the internet. ✓
- The video file is corrupted.
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- Which of the following online activities typically requires the highest bandwidth?
- reading an online news article
- checking the weather forecast
- playing a multiplayer online game ✓
- sending an email
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- Which of these is a disadvantage of wireless networks?
- higher bandwidth
- more secure
- lower bandwidth ✓
- no trailing wires
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- What is bandwidth?
- the speed at which data travels
- the amount of data that can be transferred in a given time ✓
- the strength of a wireless signal
- the number of devices on a network
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- Which unit is used to measure bandwidth?
- meters per second (m/s)
- bits per second (bps) ✓
- hertz (Hz)
- bytes per meter (B/m)
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Wired and wireless networks have different advantages and disadvantages, making them suitable for different situations.
- Bandwidth determines how much data can be sent at a time, affecting the overall time taken to complete a transfer.
- Different online activities require different amounts data be transfered.
- Different mobile data technologies provide varying levels of bandwidth, which affects the quality of network activities.
Common misconception
Bandwidth is the speed of data being transmitted across a network. The higher the bandwidth, the faster data can be transferred between points in a network.
Bandwidth is the maximum amount of data that can be transmitted at a time, not the time it takes to reach from one point to another. Higher bandwidth reduces the total transfer time of data but this is only noticable when there is a lot to transfer.
Keywords
Wired - uses a cable to connect a device to a network
Wireless - uses radio waves to connect a device to a network
Bandwidth - the maximum amount of data that can be transmitted at a time
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