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Q. With reference to communication technologies, what is/are the difference/differences between Bluetooth and Near Field Communication?

Select the correct answer using the code given below:


A
1 only
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B
2 only
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C
Both 1 and 2
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D
Neither 1 nor 2
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Solution

The correct option is A 1 only

Explanation:

Statement 1 is correct: Bluetooth is a wireless technology standard used for exchanging data between fixed and mobile devices over short distances using short-wavelength UHF radio waves. It communicates on a frequency of 2.45 gigahertz (actually between 2.400 GHz and 2.483.5 GHz, to be exact). This frequency band is one of a handful of frequencies that have been set aside by international agreements for the use of industrial, scientific, and medical devices (ISM). Near Field Communication (NFC) works on Radio waves technology. It transmits at 13.56 megahertz with a max speed of 424 kilobits per second. Most tags are passive devices that contain an antenna and a microchip. The antenna is a coil and the NFC device picks power from the magnetic field. This power is used by the NFC tag to transmit information. Thus the magnetic field provides a communication medium as well as power.

Statement 2 is incorrect: Near Field Communication (NFC) works on Radio waves technology. It is used for small information exchange or to do small actions such as contactless card payments.


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