... available wireless LAN technologies. The mainsecurity issue with wireless networks, especially radio−frequency−based networks (for example, 802. 11 based networks) , is that the wireless networks ... used to secure wireless LANs. Wetalk about security requirements of wireless LANs, the IEEE 802. 11 security architecture, theshortcomings of 802. 11 security protocols, the future of 802. 11 security, ... conversation. Wireless LANs are, therefore, inherently insecure and appropriate measures must be taken toensure a high−performance and secure wireless LAN. 87 Virtual Private Networks (VPNs)Today,...