Open Authentication for Wireless Access

Hello,
The standalone implementation of an existing wireless network is configured as Open Authentication with a TKIP Cipher. The client key management is set to WPA PSK.
What exacly is the authentication for? I see that MAC and EAP are available options. Would these options be used to block or authorize the actual wireless devices that connect to the AP?
The next thing I see is Client Authenticated Key management and I am using WPA PSK. What exactly happens once I enter thsi PSK from the client? Is it only used to encrypt the data?
Thanks,
Kevin

Hi Kevin,
Using WPA we can configure  either Enterprise or pre shared key.. Enterprise comprises of EAP and pre shared key is just the PSK..
if we are using EAP then auth will be done by the RADIUS and the encryotion will still be TKIP.. now coming back to PSK, this is shared key which will authenticate the users locally...
EAP is more secured auth compared to PSK..
Now regarding the "auth open" line.. see there are 2 kinds of auth in 802.11.. here while using wireless we need to auth twice, dot11 authentication and followed by the psk or EAP auth.. the auth open statement will force us to get the dot11 auth successful and then we move towards needed auth like PSK or EAP.. and another is Shared auth is very similar to WEP using open auth!!
in the nut shel we have 3 kinds of auth..
1> open - Dot11 auth
2> Shared - Nothing but WEP
3> 802.1X suite - EAP
again, the below link may give you some insights as well!!
http://www.cisco.com/en/US/docs/wireless/access_point/12.2_13_JA/configuration/guide/s13auth.html#wp1035025
Lemme know if this answered ur question and please dont forget to rate the usefull posts!!
Regards
Surendra

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