WLAN has fast transition enabled and legacy clients fail to connect. Which feature lets legacy clients connect while allowing FT for clients selected by OUI?
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Correct answer: Adaptive 802.11r.
Why this is the answer
Adaptive 802.11r is the correct solution because it allows legacy clients (those that do not support 802.11r Fast Transition) to connect to the WLAN while still enabling FT for clients that do support it. It achieves this by using a different authentication method for legacy clients, typically Open System or Shared Key, while 802.11r-capable clients use FT. This prevents connection failures for older devices. "Over the DS" is a general concept for communication over the Distribution System and not a specific feature for legacy client compatibility with FT. 802.11k and 802.11v are related to radio resource management and network-assisted power savings, respectively, and do not address the issue of legacy client compatibility with 802.11r Fast Transition.
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