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3.6.1. Architecture Types

ArchitectureHow It WorksSweet SpotThe Trade-off
AutonomousEach AP configured individually1-10 APsSimple setup, management nightmare at scale
Controller-basedWLC manages all APs centrally10-10,000+ APsRequires WLC infrastructure, but scales beautifully
Cloud-managedCloud dashboard manages APs5-500 APsEasy multi-site, but requires internet connectivity
Embedded WLCWLC built into Catalyst switch50-200 APsGreat for branches, limited scale

Why controller-based dominates enterprise: When a security vulnerability is discovered, you patch once on the WLC—not 500 times on individual APs. When you rename the guest network, it's one change. When you add a new SSID, it appears on every AP within minutes. Without centralized control, managing wireless at scale is a full-time job.