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Which of the following is not a type of control frame in 802.11?
Reserved
RTS
PS-Poll
None of these
Actually all of the given frames are control frames used in 802.11.
**** Excuse me, but a Google search on Reserved type of control frame in 802.11 turned up nothing. Furthermore a read of http://ilovewifi.blogspot.com/2012/07/80211-frame-types.html shows that Reserved as a control frame type is not there. Therefor the correct answer to this question is "Reserved" not "None of these." **** --Reserved is a control frame type https://supportforums.cisco.com/t5/wireless-mobility-documents/802-11-frames-a-starter-guide-to-learn-wireless-sniffer-traces/ta-p/3110019
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