Which statement accurately describes 802 11i Mixed Mode?

A.
The AP sends all stations a TKIP group key.

B.
The AP sends all stations both a TKIP and an AES group key.

C.
The AP sends stations using TKIP a TKIP group key and stations using AES an AES group key

D.
The AP sends all stations an AES group key

Explanation:

Student Guide Book 1 – Implementing and Troubleshooting HP Wireless Networks – Page 4-42
The two WPA versions correspond loosely to encryption protocols. WPA stationsalways support
TKIP, and WPA2 stations always support CCMP/AES. However,
WPA stations, with the proper software and hardware, can use AES. WPA2 stationssupport
backward compatibility with TKIP.
Because WPA and WPA2 overlap in many ways, stations of both types can join thesame WLAN.
However, all stations in the WLAN must use the required encryptionstandard. For example, if the
WLAN requires AES encryption, WPA stations can joinonly if they support such encryption, even
though AES is optional under WPA.802.11i Mixed Mode allows simultaneous support for multiple
encryption standardsso that networks can migrate from TKIP with WPA to CCMP/AES with WPA2.
Mixed
Mode allows stations to choose either a TKIP or AES key for unicast traffic.
The Mixed Mode group key is always a TKIP key. Because both WPA and WPA2stations must
support this standard, all stations can encrypt and decrypt broadcastsand multicasts.