Question: What is true regarding the IEEE 8 0 2 . 1 1 WLAN standard? a . to avoid the crowded ISM spectrum, 8 0 2

What is true regarding the IEEE 802.11 WLAN standard?
a. to avoid the crowded ISM spectrum, 802.11 requires the use of licensed frequency channels
b. both centralized and decentralized access methods are available in the 802.11 standard
c. WLAN communications can only be accomplished using an AP
d. there is no method available to minimize data collisions over unguided medium

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