What system uses radio frequency transmission for identification and tracking?

Radio Frequency Identification (RFID) technology is specifically designed for identification and tracking using radio frequency transmissions. RFID systems consist of readers and tags; the tags contain antennas that receive and transmit radio waves. When an RFID reader sends out a radio wave signal, it energizes the nearby passive tags and prompts them to send back their stored information. This allows for rapid identification and tracking of various objects, making RFID widely used in applications such as inventory management, access control, and supply chain logistics.

In contrast, other options do not primarily focus on identification and tracking through radio frequency. Simultaneous authentication of equals (SAE) is a security protocol to enhance the security of Wi-Fi password authentication and not a tracking system. Near Field Communication (NFC) involves short-range communication between devices and is often used for mobile payments but cannot track items over longer distances like RFID can. Bluetooth also facilitates data exchange but is primarily used for connecting devices over short distances rather than identification and tracking, which is the primary function of RFID technology.