BLUETOOTH RFID AND NFC FACTS EXAM
QUESTIONS WITH 100% RATED ANSWERS, GET A+
What is Bluetooth designed for? - Bluetooth is designed to allow devices to communicate within
a personal area network (PAN) of close proximity.
What types of devices typically use Bluetooth in a PAN? - PAN devices include cell phones,
PDAs, printers, mice, and keyboards.
How does Bluetooth compare to infrared (IR)? - Bluetooth is designed for longer distances than
IR and has lower power consumption.
What must Bluetooth devices do to find and connect with each other? - Bluetooth devices must
be in discovery mode to find each other and synchronize.
What frequency does Bluetooth operate on? - Bluetooth operates in the 2.4 GHz range.
What technique does Bluetooth use to avoid interference? - Bluetooth uses Adaptive Frequency
Hopping (AFH) to avoid interference.
How does Adaptive Frequency Hopping (AFH) help Bluetooth avoid interference? - AFH
automatically detects other devices and avoids the frequencies they are using.
How many channels can Bluetooth switch between to avoid interference? - Bluetooth can switch
between 79 channels.
What encryption does Bluetooth use? - Bluetooth uses a 128-bit proprietary encryption
mechanism.
What determines the range of a Bluetooth device? - The class of the device determines its range.
What is the range of a Class 1 Bluetooth device? - Class 1 devices can transmit up to 100 meters.
, What is the range of a Class 2 Bluetooth device? - Class 2 devices can transmit up to 10 meters.
What is the range of a Class 3 Bluetooth device? - Class 3 devices transmit at a range less than
10 meters.
What is the speed and range of Bluetooth 1.0? - Bluetooth 1.0 operates at a range of 10 meters
and speeds up to 1 Mbps.
What is the speed and range of Bluetooth 2.0? - Bluetooth 2.0 operates at a range up to 30 meters
and speeds up to 1 Mbps.
What special mode does Bluetooth 2.0 support for faster speeds? - Bluetooth 2.0 supports
Enhanced Data Rate (EDR), which allows speeds up to 3 Mbps.
What is the speed and range of Bluetooth 3.0? - Bluetooth 3.0 operates at a range up to 30 meters
and speeds up to 1 Mbps.
What special mode does Bluetooth 3.0 use for high-speed transfers? - Bluetooth 3.0 uses High
Speed (HS) mode to achieve speeds up to 24 Mbps via a nearby 802.11 link.
What is the speed and range of Bluetooth 4.0? - Bluetooth 4.0 operates at a range up to 60 meters
and speeds up to 1 Mbps (24 Mbps using High Speed mode).
What new standard was introduced in Bluetooth 4.0? - Bluetooth 4.0 introduced the Bluetooth
Low Energy (BLE) standard.
What is the benefit of Bluetooth Low Energy (BLE)? - BLE reduces the power consumption of
Bluetooth devices.
What is the speed and range of Bluetooth 5.0? - Bluetooth 5.0 operates at a range up to 240
meters and speeds up to 2 Mbps (48 Mbps using High Speed mode).
QUESTIONS WITH 100% RATED ANSWERS, GET A+
What is Bluetooth designed for? - Bluetooth is designed to allow devices to communicate within
a personal area network (PAN) of close proximity.
What types of devices typically use Bluetooth in a PAN? - PAN devices include cell phones,
PDAs, printers, mice, and keyboards.
How does Bluetooth compare to infrared (IR)? - Bluetooth is designed for longer distances than
IR and has lower power consumption.
What must Bluetooth devices do to find and connect with each other? - Bluetooth devices must
be in discovery mode to find each other and synchronize.
What frequency does Bluetooth operate on? - Bluetooth operates in the 2.4 GHz range.
What technique does Bluetooth use to avoid interference? - Bluetooth uses Adaptive Frequency
Hopping (AFH) to avoid interference.
How does Adaptive Frequency Hopping (AFH) help Bluetooth avoid interference? - AFH
automatically detects other devices and avoids the frequencies they are using.
How many channels can Bluetooth switch between to avoid interference? - Bluetooth can switch
between 79 channels.
What encryption does Bluetooth use? - Bluetooth uses a 128-bit proprietary encryption
mechanism.
What determines the range of a Bluetooth device? - The class of the device determines its range.
What is the range of a Class 1 Bluetooth device? - Class 1 devices can transmit up to 100 meters.
, What is the range of a Class 2 Bluetooth device? - Class 2 devices can transmit up to 10 meters.
What is the range of a Class 3 Bluetooth device? - Class 3 devices transmit at a range less than
10 meters.
What is the speed and range of Bluetooth 1.0? - Bluetooth 1.0 operates at a range of 10 meters
and speeds up to 1 Mbps.
What is the speed and range of Bluetooth 2.0? - Bluetooth 2.0 operates at a range up to 30 meters
and speeds up to 1 Mbps.
What special mode does Bluetooth 2.0 support for faster speeds? - Bluetooth 2.0 supports
Enhanced Data Rate (EDR), which allows speeds up to 3 Mbps.
What is the speed and range of Bluetooth 3.0? - Bluetooth 3.0 operates at a range up to 30 meters
and speeds up to 1 Mbps.
What special mode does Bluetooth 3.0 use for high-speed transfers? - Bluetooth 3.0 uses High
Speed (HS) mode to achieve speeds up to 24 Mbps via a nearby 802.11 link.
What is the speed and range of Bluetooth 4.0? - Bluetooth 4.0 operates at a range up to 60 meters
and speeds up to 1 Mbps (24 Mbps using High Speed mode).
What new standard was introduced in Bluetooth 4.0? - Bluetooth 4.0 introduced the Bluetooth
Low Energy (BLE) standard.
What is the benefit of Bluetooth Low Energy (BLE)? - BLE reduces the power consumption of
Bluetooth devices.
What is the speed and range of Bluetooth 5.0? - Bluetooth 5.0 operates at a range up to 240
meters and speeds up to 2 Mbps (48 Mbps using High Speed mode).
