Correct Answer: A
Explanation/Reference:
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.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 484