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Existing WLAN security schemes are few and product specific. While there exist some schemes for dealing with problems relating to Information Integrity, there are hardly any standard solutions for security problems relating to Quality of Service and Network Health Maintenance in Wireless Networks. In the absence of strong standards, the existing approach to general WLAN security is vendor specific.We propose a low cost and generic secure WLAN architecture which can be implemented on WLANs comprising of Access Points from different vendors. A behavior monitoring scheme which validates the model has been developed and tested.