In plain English
NFC is the technology behind tap-to-pay and most modern access cards. In physical security, NFC enables staff to unlock doors by tapping a card, fob, or their smartphone against a reader. Because the range is extremely short (typically under 4 cm), accidental reads are rare. Modern access control platforms like Ubiquiti UniFi Access support NFC credentials via cards, key fobs, and mobile devices running iOS or Android.
