An engineer must design a predictive site survey. The wireless network must be "location-ready". Each floor is quite small and has only a few offices. Which approach must be considered?

Two APs provide only two reference points, which is insufficient for triangulation and cannot produce a reliable location estimate.

One AP provides only a single signal reference, making any two-dimensional location calculation impossible.

Cisco location services require signal input from a minimum of three access points to calculate a client's X/Y position via triangulation or trilateration. With only one or two APs, the system lacks sufficient reference points to compute accurate location coordinates. This three-AP minimum is a foundational requirement in Cisco's Location Services design guidance for any floor that must be location-ready.

Four APs exceed the minimum requirement and improve accuracy, but the question asks for the minimum approach that must be considered, not the optimal density.