Correct Answer: B
Explanation/Reference:
The combination door lock or cipher lock uses a numeric key pad, push button, or dial to gain entry, it is often seen at airport gate entry doors and smaller server rooms. The combination should be changed at regular interval or whenever an employee with access is transferred, fired or subject to disciplinary action.
This reduces risk of the combination being known by unauthorized people.
A cipher lock, is controlled by a mechanical key pad, typically 5 to 10 digits that when pushed in the right combination the lock will releases and allows entry. The drawback is someone looking over a shoulder can see the combination. However, an electric version of the cipher lock is in production in which a display screen will automatically move the numbers around, so if someone is trying to watch the movement on the screen they will not be able to identify the number indicated unless they are standing directly behind the victim.
Remember locking devices are only as good as the wall or door that they are mounted in and if the frame of the door or the door itself can be easily destroyed then the lock will not be effective. A lock will eventually be defeated and its primary purpose is to delay the attacker.
For your exam you should know below types of lock
Bolting door lock - These locks required the traditional metal key to gain entry. The key should be stamped
"do not duplicate" and should be stored and issued under strict management control.
Biometric door lock - An individual's unique physical attribute such as voice, retina, fingerprint, hand geometry or signature, activate these locks. This system is used in instances when sensitive facilities must be protected such as in the military.
Electronic door lock - This system uses a magnetic or embedded chip based plastic card key or token entered into a sensor reader to gain access. A special code internally stored in the card or token is read by sensor device that then activates the door locking mechanism.
The following were incorrect answers:
Bolting door lock - These locks required the traditional metal key to gain entry. The key should be stamped
"do not duplicate" and should be stored and issued under strict management control.
Biometric door lock - An individual's unique body features such as voice, retina, fingerprint,, hand geometry or signature, activate these locks. This system is used in instances when extremely sensitive facilities must be protected such as in the military.
Electronic door lock - This system uses a magnetic or embedded chip based plastic card key or token entered into a sensor reader to gain access. A special code internally stored in the card or token is read by sensor device that then activates the door locking mechanism.
Following reference(s) were/was used to create this question:
CISA review manual 2014 Page number376
and
Hernandez CISSP, Steven (2012-12-21). Official (ISC)2 Guide to the CISSP CBK, Third Edition ((ISC)2 Press) (Kindle Locations 25144-25150). Acerbic Publications. Kindle Edition.
