Abstract: As the wireless communications is coming to the offices and the homes, there are some new security issues to take care. Today we have continuously growing markets for the wireless LANs, but there is a big black hole in the security of this kind of networks. This study explores and analyzes the threats and vulnerabilities of wireless LANs. The research is intended to help business owners and network administrators understand the key elements that a secure wireless network requires so they can avoid the expense and risk associated with an inadequate deployment. The study also provides background information, suggestions and guidelines for assessing the various types of wireless security solutions available using today’s technology.