The handbook suggests that these settings can be used for WPA in FreeBSD:
wlans_ath0="wlan0" ifconfig_wlan0="WPA DHCP"
But as far as I'm concerned this very settings can be used for WEP.
So what does "WPA" here stand for?
Judging by the code inside
WPA indicate that the wireless device wlan0 use WPA security protocols.