QUESTION 17
What is true regarding the IEEE 802.11 WLAN standard?
WLANs operate in the licensed operating frequencies; therefore, data collisions do not occur.
Since 802.11 WLANs implement DSSS and OFDM, there is no need for a collision avoidance mechanism.
The 802.11 Point Coordination Function (PCF) is an optional feature that enables the WLAN to operate as a centralized access network.
802.11 networks only implement centralized access using access points (APs).