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多选题
Which three statements are true about load-based Call Admission Control?（）
A
grants a VoWLAN client-initiated call based on the number of active clients associated to the accesspoint
B
grants a VoWLAN client-initiated call based on channel bandwidth capacity
C
uses the 802.11i specification
D
uses 802.11 action frames
E
requires a WMM-enabled client
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