IEEE 802.11ai is a Wireless LAN standard from IEEE that since June 2017[1] provides fast initial link setup (FILS) methods that enable a wireless LAN client to achieve a secure link setup within 100ms, designed to improve dense environments.
[1] FILS provides fast roaming without 802.11r.
[2] The Intel wireless daemon IWD in Linux added support for FILS in May 2019.
[3] A denial-of-service attack has been reported for 802.11ai.
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