NFC (Near Field Communication) - definition
NFC is short-range wireless communication technology. By using this technology we can do contactless payments such as Apple Pay, Ali Pay, etc. it shares data over radio frequency. NFC is basically a tiny piece of a chip that gets powered up by the host device and the host can read the security number or codes stored inside of that chip. Nowadays more or less every flagship mobile has NFC built-in, not only a smartphone, but few smartwatches also have this feature. NFC is a family member of RFID (Radio Frequency Identification) but provides a more secure and fast communication protocol than RFID. To use NFC, both the host and the NFC enabled device should be over a distance of 4cm or less. The operating frequency of NFC is 13.56 MHz (Mega-hertz).