802.11 Fast BSS Transition (FT) Part 1 of 2
The 802.11i amendment gave us Preauthentication and Pairwise Master Key (PMK) Caching. Nothing fancy, just the basics. Preauthentication enables supplicants (stations) to authenticate with authenticators (APs or WLAN controllers) to which they may roam. Preauthentication always happens through the AP to which the station is currently associated – over the distribution system (typically an Ethernet network).
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