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WorksheetsComputer Networks 0417 IGCSE "4.13 Wi-Fi and Bluetooth"
Total questions: 15
Worksheet time: 8mins
What is the carrier of data transmission for both Wi-Fi and Bluetooth?
A. Radio waves
B. Electromagnetic radiation
C. Infrared radiation
D. Ultraviolet radiation
How many frequencies does Bluetooth use?
79
80
81
82
What is the frequency that all 79 channels of Bluetooth are centered on?
2.45 GHz
5 GHz
79 GHz
How do devices using Bluetooth avoid interfering with other devices?
By using the same channel as other devices.
By using a different channel from the 79 options.
By using a different frequency band.
By using a different carrier wave.
What is the name of the technique used by devices using Bluetooth to minimize interference with other devices?
Frequency modulation
Amplitude modulation
Spread-spectrum frequency hopping
Phase modulation
What does Bluetooth use to create a secure wireless personal area network (WPAN)?
Key encryption
Public-key encryption
Symmetric-key encryption
Hashing algorithm
What is the maximum distance between two devices for which Bluetooth is useful?
Less than 10 metres
Less than 20 metres
Less than 30 metres
Less than 40 metres
For what type of applications is Bluetooth useful?
High-bandwidth applications, such as streaming video.
Low-bandwidth applications, such as sending music files from a mobile phone to a headset.
Applications that require long-range communication.
Applications that require high security.
Which frequency band has a faster data transfer rate but a shorter signal range in Wi-Fi?
The 2GHz band
The 3GHz band.
The 4GHz band.
The 5GHz band
What are the two most common frequency bands used by Wi-Fi?
2 GHz and 3 GHz
2.4 GHz and 5 GHz
2.8 GHz and 5 GHz
4 GHz and 6 GHz
.Which technology is best suited for operating full-scale networks, Wi-Fi or Bluetooth?
A.Wi-Fi
B.Bluetooth
Which technology is best suited for operating full-scale networks, Wi-Fi or Bluetooth?
WI-FI
Bluetooth
What is the maximum distance up to which a Wi-Fi-enabled device can access the internet wirelessly at any access point (AP) or ‘hot spot’?
Up to 50 metres away
Up to 75 metres away
Up to 100 metres away
Up to 125 metres away
What is the maximum distance between two devices for which Bluetooth is useful
Less than 10 metres
Less than 20 metres
Less than 30 metres
Less than 40 metres
WI-FI uses (WEP,WPA) as a type of data transmission security.
TRUE
FALSE
