A wireless local area network (WLAN) enables access to computing resources for devices that are not physically connected to a network. WLANs typically operate over a fairly limited range, such as an office building or building campus, and usually are implemented as extensions to existing wired local area networks to enhance user mobility. This guide seeks to assist organizations in better understanding the most commonly used family of standards for WLANs-Institute of Electrical and Electronics Engineers (IEEE) 802.11-focusing on the security enhancements introduced in the IEEE 802.11i amendment. In particular, this guide explains the security features and provides specific recommendations to ensure the security of the operating environment.