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WI-FI (WIreless FIdelity) devices - well-known for their portability, flexibility and increased productivity are based on IEEE 802.11 standard. IEEE 802.11 WLAN, or Wi-Fi, is the most widely accepted broadband wireless networking technology, providing the highest transmission rate among wireless networking technologies. Enterprise Wireless Fidelity implementations have complicated requirements for Authentication, Authorization, Accounting (AAA) and detection of unauthorized access. Recent incidents show that unsecured implementations invite severe risk to enterprise network and data (especially for financial and critical sectors). In this paper a secure implementation is proposed which addresses most of the possible threats in enterprise arena. The system is based on IEEE 802.1X port based NAC. The system is having authentication, authorization and accounting/auditing features.
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