Chapter 6
1. D. An 802.11 frame contains four different address fields.
2. B. Frames are marked as going to the DS or from the DS.
3. D. The Address1 field always contains the RA.
4. A. 802.11 devices can participate in the distributed coordination function (DCF).
5. C. A wireless client uses the network allocation vector (NAV) to predict the number of timeslots required for the channel to become free so that a frame can be transmitted.
6. D. Frames are separated by the distributed interframe space (DIFS).
7. B. A probe request frame is sent to ask any listening APs to identify themselves.
8. B. A wireless device must send an ACK frame, one of the 802.11 control frames, back to the source of each unicast frame that is received.
9. A, B. A client ...
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