<--1.client sends probe request via RF. --->
---> 2.APs(a/b) send probe response via RF.<--
client evaluates probe response and selects best
AP(a)
<--- 3.client sends authentication request to
selected AP(a) via RF.
---> 4.AP(a) confirms authentication via RF packet.
<--- 5.client sends association request to selected
AP(a) via RF packet
---> 6.AP(a) confirms association request via RF
packet and registers client.
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