Which of the following is NOT a system-sensing wireless proximity card?

A.
magnetically striped card

B.
passive device

C.
field-powered device

D.
transponder

Explanation:
A system sensing device recognizes the presence of a card and communicates with it without the user needing
to carry out any activity.
A magnetically striped card is a card with a magnetic strip along one edge of the card. Credit cards today still
have magnetic strips although they are rarely used for reading the card. To obtain information from the card by
using the magnetic strip, the card needs to be ‘swiped’ through a card reader. The physical contact required
between the card and the card reader means that a magnetically striped card is not a wireless proximity card.
System sensing access control readers, also called transponders, recognize the presence of an approaching
object within a specific area. This type of system does not require the user to swipe the card through the
reader. The reader sends out interrogating signals and obtains the access code from the card without the user
having to do anything.
Incorrect Answers:
B: A passive device is a wireless proximity card. Passive devices contain no battery or power on the card, but
sense the electromagnetic field transmitted by the reader and transmit at different frequencies using the power
field of the reader. Therefore, this answer is incorrect.
C: A field-powered device is a wireless proximity card. They contain active electronics, a radio frequency
transmitter, and a power supply circuit on the card. Therefore, this answer is incorrect.
D: A transponder is a wireless proximity card. The reader and card communicate directly. The card and reader
have a receiver, transmitter, and battery. The reader sends signals to the card to request information. The card
sends the reader an access code. Therefore, this answer is incorrect.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 484