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CWAP Chapter 8 Exam Questions and Answers
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CWAP Chapter 8 Exam Questions and Answers
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CWAP Chapter 8What 802.11 amendment defined new power management methods, involving the STA
entering the doze state, that are used in real-world devices? - Question and
answers802.11n defined unscheduled PSMP
802.11e defined U-APSD
which are used in real-world stations and APs that are WMM Power Save certified.
Which of the following frames types is typically used by stations to notify an AP of a
change in power management mode? - Question and answersNull data frames use the
power management flag in the 802.11 header to change between active mode and
power save mode.
PS-Poll frames are used in power management, but they are not typically used to
retrieve buffered unicast frames from the AP, not to notify the AP of a change in power
state.
What state drains most of the battery life? - Question and answersTransmit
What sate drains the least amount of battery life? - Question and answersDoze
What power management method uses the PS-Poll frame? - Question and
answers802.11 power management.
The Bitmap offset defines: - Question and answershow many 8-bit sequences may be
eliminated from the Partial Virtual Bitmap because of the stations not having unicast
frames buffered at the AP.
If the only station that has buffered unicast frames at the AP was assigned an AID of 27,
what will be the value of the Bitmap Offset in the TIM information element? - Question
and answers1. The Bitmap Offset defines how many 8-bit sequences (octet) may be
eliminated from the Partial Virtual Bitmap field because of the stations not having
unicast frames buffered at the AP. Each station is assigned an AID, and if the station
does not have any unicast frames buffered at the AP, then the value for the station's
AID in the Partial Virtual Bitmap is 0. If an entire of AIDs at the start of the bitmap are 0s
( AIDs 0-7, 8-15, 16-24 and so on), then a Bitmap Offset value can be set. If a STA with
with an AID is 27 is the first set AID with unicast frames buffered at the AP, then a
Bitmap Offset value of 1 (meaning the AIDs 0-7 and 8-15 are all set to 0) would be
used.
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