CWAP Chapter 7 Review Cards from Sybex CWAP PWO-270 Westcott Coleman Mackenzie Miller Study Guide 2024.

CWAP Chapter 7 Review Cards from Sybex CWAP PWO-270 Westcott Coleman Mackenzie Miller Study Guide 2024. Coordination function not used. - correct answer PCF What would cause a 2.4GHz 802.11n station to stay quiet after data has been transmitted? - correct answer -An 802.11b station from a nearby BSS is transmitting a data frame, and the received signal is above the ED threshold. -APs and STA stay quiet because of the CCA being set to BUSY whenever another whenever another 802.11 transmission is detected above the ED threshold. -Below the ED threshold, channel is IDLE This IFS is used only in between frame transmissions by the same STA or AP. - correct answer -RIFS -RIFS- 802.11n used exclusively between frames transmitted during a CFB. -A Single CFB is always transmitted by a single STA. -AIFS & EIFS are used exclusively between frames transmitted by different STA. -The SIFS may be used during a CFB, but it may also be used prior to an acknowledgement, which would place it between frames transmitted by different stations. This IFS is used when an 802.11n station begins the arbitration process after a failed transmission. - correct answer -802.11n stations will always use AIFS even when the previous transmission has failed. -DIFS 802.11 b/g/n station that is not QoS. -EIFS is only used when the previous frame was seen as corrupted. -SIFS is never used during arbitration. What two access categories use the same default AIFSN values by default? - correct answer Voice Video