What is NFC & how does it work?

Many of people don't know about nfc and how does it work so i had decided to share it with you peoples .

NFC stands for “Near Field Communication” and, as the name implies, it enables short range communication between compatible devices. This requires at least one transmitting device, and another to receive the signal. A range of devices can use the NFC standard and can be considered either passive or active, depending on how the device works.

Passive NFC devices include tags, and other small transmitters, that can send information to other NFC devices without the need for a power source of their own. However, they don’t really process any information sent from other sources, and can’t connect to other passive components.  These often take the form of interactive signs on walls or advertisements.

Active devices are able to both send and receive data, and can communicate with each other as well as with passive devices. Smartphones are by far the most common implementation of active NFC devices, but public transport card readers and touch payment terminals are also good examples of the technology.

How does its works?

Just like Bluetooth and WiFi, and all manner of other wireless signals, NFC works on the principle of sending information over radio waves.  Near Field Communication is another standard for wireless data transitions, meaning that there are specifications which devices have to adhere to in order to communicate with each other properly. The technology used in NFC is based on older RFID (Radio-frequency identification) ideas, which uses electromagnetic induction in order to transmit information. 

The transmission frequency for data across NFC is 13.56 megahertz, and data can be sent at either 106, 212 or 424 kilo bits per second, which is quick enough for a range of data transfers – from contact details to swapping pictures and music.

How to use it ?

If your device has NFC, the chip and Android Beam need to be activated so that you can use NFC:

1. Go to Settings > Wireless & Networks > More.
2. Tap on the NFC switch to activate it. The Android Beam function will also automatically turn on.
3. If Android Beam does not automatically turn on, just tap it and select Yes to turn it on.

Smartphones’ NFC capabilities operate in tandem with Android Beam. If Android Beam is disabled, it may limit NFC’s sharing capacity.
  After doing above steps then set your devices as shown in picture
     

 If you have a high-end smartphone, the chances are it has NFC. But you can be sure by checking out the definitive list of NFC-compatible devices here: http://www.nfcworld.com/nfc-phones-list/ .