In PCF, the client devices cannot transmit unless ________.
A) the WLAN is operating in peer-to-peer mode
B) the AP sends an ACK frame
C) the AP sends data first
D) the client is "polled" by the AP

Question

Quizplus · Accepted Answer

In PCF (Point Coordination Function), the AP (Access Point) polls individual client devices to transmit data, so the client cannot transmit until it is polled by the AP. The other choices (A, B, and C) are not correct because peer-to-peer mode does exist in WLAN but not relevant to PCF, ACK frames are sent after successful transmission, and the AP does not need to send data first for the client to transmit in PCF.

In PCF, the Client Devices Cannot Transmit Unless ________