Matthew Gast is the author of 802.11 Wireless Networks: The Definitive Guide, Network Printing, and T1: A Survival Guide. Gast: Each wireless LAN deployment is unique in many respects, and careful planning and a meticulous site survey are required before removing any equipment from the box. Gast says wireless networks require far more deployment planning because of the nature of the radio link. The guiding principle of Figure 15-1 is that mobility must be limited to the link layer, because network-layer mobility is not generally available on IP networks.”]
Source: https://www.amazon.co.uk/exec/obidos/ASIN/0596001835/helpnetsecuri-21