Explanation/Reference:
Explanation:
Doorways with automatic locks can be configured to be fail-safe or fail-secure. A fail-safe setting means that if a power disruption occurs that affects the automated locking system, the doors default to being unlocked. Fail-safe deals directly with protecting people. If people work in an area and there is a fire or the power is lost, it is not a good idea to lock them in. A fail-secure configuration means that the doors default to being locked if there are any problems with the power. If people do not need to use specific doors for escape during an emergency, then these doors can most likely default to fail-secure settings.
Incorrect Answers:
A: The doorway should be configured to be fail-safe, not fail-secure. A fail-secure configuration could lock people in the building if a power disruption occurs that affects the automated locking system. Therefore, this answer is incorrect.
C: A door delay cipher lock will sound an alarm if the door is held open for too long. This is not a requirement for a doorway of a manned facility. Therefore, this answer is incorrect.
D: Piggybacking is when an individual gains unauthorized access by using someone else's legitimate credentials or access rights. Usually an individual just follows another person closely through a door without providing any credentials. It is not a requirement for a doorway of a manned facility to not allow piggybacking. Therefore, this answer is incorrect.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 451