Test wpa-encrypted

[antonio giulio <antongiulio05@gmail.com>]

Hi,

I have installed wpa_supplicant for my wireless connection.
Is there a way to test it? I can use internet normally, but I'm not
sure that it's using wpa (I have read this tutorial: 
http://www.neowin.net/forum/index.php?showtopic=399787&view=getlastpost).
Could be good a sniffer like ethereal? And if so, how test it?

Thanks,
Giulio