Doubt about WPA and WPA2

[Raghavendra. S]

Hi,

   I read some where that only WPA2 has capability to use AES/CCMP
encryption. But I saw few Access Points which provide an option to
configure WPA1 to use either of TKIP or CCMP/AES, can any body tell me
why?


They option to configure AP, with PSK-Mixed/WPA-Mixed/WPA2-Mixed, here
in all three cases user can configure encryption types as one of AES,
TKIP and (AES+TKIP), please tell what it means?

-- 
Regards & Thanks
Raghavendra. S