Explanation/Reference:
Explanation:
802.11 Wireless Local Area Network uses CSMA\CA.
Note: Carrier sense multiple access with collision avoidance (CSMA/CA) is a network multiple access method in which carrier sensing is used, but nodes attempt to avoid collisions by transmitting only when the channel is sensed to be "idle".
Incorrect Answers:
B: While Ethernet uses CSMA/CD, 802.11 Wireless does not. In wireless networks the collision detection of the alternative CSMA/CD is unreliable due to the hidden node problem.
C: 802.11 uses Carrier sense multiple access (CSMA/CA).
D: Wireless network uses CSMA/CA, not 802.11 RTS/CTS Exchange.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 578

The concept of need-to-know means that, in addition to whatever
specific object or role rights a user may have on the system, the
user has also the minimum amount of information necessary to perform
his job function.
* Answer "Need-to-know ensures that no single individual (acting alone) can compromise security controls." is separation of duties, assigning parts of tasks to different personnel.
*Answer "Need-to-know grants each user the lowest clearance required for their tasks." is least privilege, the user has the minimum security level required to perform his job function.
*Answer "Need-to-know limits the time an operator performs a task." is rotation of duties, wherein the amount of time an operator is assigned a security-sensitive task is limited before being moved to a different task with a different security classification.

Explanation

Explanation