AP modes differ in management. The HCSP-Presales-Campus Network Planning and Design V1.0 documentation explains:

A: Fat APs are standalone, manually configured, simple, and cost-effective—true.

B: Fat APs are not centrally managed by a WAC (Wireless Access Controller); this applies to Fit APs—false.

C: Cloud-mode APs are managed by iMaster NCE, not WACs, but this varies by deployment—partially true but not definitive.