An engineer configures a WLAN with fast transition enabled. Some legacy clients fail to connect to this WLAN. Which feature allows the legacy clients to connect while still allowing other clients to use fast transition based on their OUIs?

A. over the DS
B. 802.11k
C. adaptive R
D. 802.11v

An engineer configures a WLAN with fast transition enabled. Some legacy clients fail to connect to this WLAN. Which feature allows the legacy clients to connect while still allowing other clients to use fast transition based on their OUIs?

A. over the DS
B. 802.11k
C. adaptive R
D. 802.11v

Correct Answer: C

Cisco 802.11r supports three modes:

+ Pure mode: only allows 802.11r client to connect

+ Mixed mode: allows both clients that do and do not support FT to connect

+ Adaptive mode: does not advertise the FT AKM at all, but will use FT when supported clients connect.