A warehouse gate reads a tag on each pallet as it passes. The tag has no battery of its own. Which technology is the tag?
Select an answer to reveal the explanation.
Short Explanation
The pallet rolls through a gate and the gate hears a tag that carries no battery of its own. That tag is the radio-frequency identification you read at the gate. A Wi-Fi join, a Bluetooth pairing, and a phone tap are different radios with different habits.
Full Explanation
Radio-frequency identification tags can be passive, with no battery, and a reader at a gate powers and reads them as they pass. The warehouse tags match that technology. An 802.11 association is a Wi-Fi client joining an access point. A pallet tag with no battery is not a Wi-Fi client. Bluetooth pairing is a short-range relationship that normally involves devices with their own power and a pairing step. A battery-free pallet tag does not complete that pairing. Near-field communication is a very short tap, typically a phone against a terminal. A pallet passing a gate is not tapping a phone. Exam caveat: the reader and the tag have to be the same family. A tag the gate cannot excite will pass through unread. Operational check: walk a tagged pallet through the gate and confirm the reader logs that tag without a battery in the tag. Log one tagged pallet and one untagged pallet so you know the gate is reading tags, not every object. Use a tag the gate is built to read, and confirm the log names that pallet.