Do wireless network cards need to support WMM (802.11e) or is it only a function of a wireless acces

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Do wireless network cards need to support WMM (802.11e) or is it only a function of a wireless access point?

 

 

802.11e specifies enhancements to the Media Access Control (MAC) layer of 802.11 networks. So it must be supported in all WLAN devices in order to work.