WPA provides all of the following improvements to 80211 wire

WPA provides all of the following improvements to 802.11 wireless security, EXCEPT: Choose one

Solution

Please follow the data and description :

Wi-Fi Protected Access (WPA) and the Wi-Fi Protected Access II (WPA2) are two security protocols that are developed by the Wi-Fi Alliance to secure the wireless computer networks.

WPA provides all of the following improvements to 802.11 wireless security,

a) Keyed hash for integrity instead of CRC32 checksum.
b) Authentication using EAP to a central server instead of pre-shared key between client and AP.
c) Better implementation of RC4 using stronger IV and key rollover.

So the answer is OPTION D (Protection against denial of service through encrypted management frames.)

Hope this is helpful.