Final answer:
The technology that allows one device to identify the status of another is used in electronic toll collection systems like E-ZPass and mobile communication for tracking cell phones.
Step-by-step explanation:
The technology being referred to allows one device to identify the status of another and is widely used in various systems such as electronic toll collection and mobile communication.
In the context of electronic toll collection systems like E-ZPass, FasTrak, and I-Pass, this technology automatically identifies a passing vehicle through an RFID transponder to charge the toll without the need for stopping. Meanwhile, in mobile communication, a device known as an IMSI catcher identifies and tracks all cell phones within its range, which can potentially be used by both law enforcement and criminals to surreptitiously activate a phone's microphone and camera.