Both Wi-Fi and Bluetooth offer wireless communication between devices. Bluetooth is useful when which of the following is true?

1.Transferring data between two or more devices which are less than 30 metres apart

2.The speed of data transmission is not critical

3.Using a high-bandwidth application, for example sending music files from a mobile phone to a headset

A1 & 2 only ✓ Correct

B1 & 3 only

C2 & 3 only

D1, 2 & 3

Correct answer: (A) 1 & 2 only

Explanation

Bluetooth suits short-range links between nearby devices where transfer speed is not critical.

Statement 1 fits because Bluetooth connects devices only over short distances.

Statement 2 fits because Bluetooth carries data slowly and speed is not its strength.

Statement 3 is wrong because Bluetooth is low-bandwidth and unsuited to demanding transfers.

Sending large music files quickly is better served by Wi-Fi or a cable.

Bluetooth trades speed for low power use and simple pairing.

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