All right , All the things I need to know now I get !!
Thanks for your helpful answer
(Look back to my question It look so damn sorry for this so much)

The direct answer for me and for this question
is about Radius Server (the authentication server)
Now I can imagine and Illustrate how the authentication
process running
Client connect to Authenticator(wireless Access Point or Wireless Router) via
EAP in 802.1x then Authenticator connect to Radius Server (Authentication Server)
for doing a authentication process , If qaulified client be the members of network and can use the public resources of that network (Internet,File Sharing,...)
Finally I wanna say Thankyou to these people
- A.Chotipatt Pornnavalai
- A.Lapas Pradittasnee
- P' Gundam
for your best regards
for anyone who need to get more information about
wireless sequrity method I recommend this link :
http://www.thaicert.nectec.or.th/paper/wireless/IEEE80211_4.php