What is it called when two Bluetooth devices connect and remember each other for the first time?
AnswerPairing
Pairing sets up a trusted link between two devices so they can reconnect automatically later.
Tech · Facts & stats
BT facts & stats
7 fact-checked facts about Bluetooth wireless technology, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Bluetooth is mainly designed for what kind of connection?
AnswerShort-range wireless links
Bluetooth was designed to connect nearby devices, such as headphones and phones, without cables.
Going deeper
Bluetooth operates in which radio frequency band?
Answer2.4 GHz
Bluetooth uses the licence-free 2.4 GHz ISM band, from about 2.400 to 2.4835 GHz.
What does BLE stand for?
AnswerBluetooth Low Energy
Bluetooth Low Energy is a version designed for very low power use, ideal for small sensors and wearables.
Which household appliance uses the same unlicensed radio band as Bluetooth and can interfere with it?
AnswerMicrowave oven
Microwave ovens heat food with radio waves in the same ISM band, so a running microwave can disrupt nearby Bluetooth links.
Expert level
Which technique does Bluetooth use to reduce interference from other radio signals?
AnswerFrequency hopping
Bluetooth rapidly hops between many narrow channels, so interference on one channel has little effect.
What is a small ad hoc network of connected Bluetooth devices called?
AnswerA piconet
A piconet links one central Bluetooth device with a small number of active peripheral devices.
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