Bluetooth and NFC (Near Field Communication) are both wireless communication technologies, but they differ in several key aspects. Here's how they relate to the options provided:
A. Devices are able to connect wirelessly.
Both Bluetooth and NFC allow for wireless connections, so this statement is true for both technologies.
B. Devices have to be within a short range of each other.
This statement is more applicable to NFC, as it typically requires devices to be within a few centimeters of each other to establish a connection. Bluetooth has a longer range, usually up to 10 meters or more, depending on the specific version and conditions.
C. Devices have to be compatible.
This is true for both Bluetooth and NFC; devices must support the respective technology to communicate. However, compatibility is more relevant as a general requirement for any wireless communication.
D. Devices have to be paired.
Bluetooth usually requires pairing, where devices establish a secure connection before communication can occur. NFC, on the other hand, does not require pairing in the same way, as it's often used for simpler or quick connections (like tap-to-pay).
In summary, the correct answer highlighting a key difference between Bluetooth and NFC is B. Devices have to be within a short range of each other.