Certified Information Systems Security Professional (CISSP) Practice Exam 2026 – All-in-One Guide to Mastering Your Certification!

Passive RFID tags are the correct choice because they operate without an internal power source. Instead, they draw power from the electromagnetic field generated by an RFID reader. When the reader emits a radio frequency signal, the passive tag captures some of that energy, allowing it to transmit its stored information back to the reader. This characteristic distinguishes passive RFID tags from active RFID tags, which contain a battery and can transmit signals independently.

In contrast, active RFID tags are powered by an internal battery and can communicate over longer distances than passive RFID tags. Smart RFID does not refer to a specific type of RFID technology; rather, it suggests the integration of RFID with additional processing capabilities. Magnetic RFID is not a recognized category in RFID technologies. Therefore, passive RFID is explicitly identified for not needing any power source beyond what is provided by the RFID reader, making it the clear fitting choice for unpowered RFID tags.