This book provides the motivation behind the research work, background knowledge, previously reported work related to the Virus detection and a comprehensive review of the outstanding vulnerabilities and attacks in wireless local area networks (WLAN). The need, objectives, research methodology and scheme of the study.Wireless local area networks (WLANs) continue to grow rapidly despite sluggish capital spending and overall poor economic conditions. In today¿s broadcasting environment, the computation of the data through wireless local area networks (WLAN) is more prone to attacks when it is compared with wired networks.