Of the following, which multiple access method for computer networks does 802.11 Wireless Local Area Network use?
Correct Answer: A
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