IEEE 802.11 Wireless Networks have gained popularity, providing users mobility and flexibility in accessing information. Existing solutions for wireless LAN networks have been exposed to security vulnerabilities. Previous study has evaluated the security performance of IEEE 802.11 wireless networks using single server- client architecture. The research presented in this book investigates the effect of multiple security mechanisms on the performance of multi-client congested and un-congested networks. The effect of different TCP and UDP packet sizes on performance of secure networks was also...