The purpose of this document is to provide guidance to organizations in securing their legacy IEEE 802.11 wireless local area networks (WLAN) that cannot use IEEE 802.11i. Details on securing WLANs capable of IEEE 802.11i can be found in NIST Special Publication (SP) 800-97. Recommendations for securely using external WLANs, such as public wireless access points, are outside the scope of this document.