Introduction203113-B 1-5Figure 1-1 illustrates an infrastructure network:Figure 1-1. Infrastructure NetworkNetwork Service AreasCoverage area, or cell around each access point, is called its basic service area(BSA), as illustrated in Figure 1-1.Figure 1-2. Extended Service AreaTotal coverage area in a facility consists all the overlapping BSAs with the sameSSID, is called the extended service area (ESA) (see Figure 1-2).1 2 34 5 6Mobile unit out ofrange of allaccess pointsServerBayStackAccessPoint8702FA8828FA225 feet(69 meters)
