Which of the following uplink/downlink configurations is used where mobile or fixed-station point-of-sale terminals are linked to a home office?

The correct configuration for linking mobile or fixed-station point-of-sale terminals to a home office is multipoint-to-point. In this scenario, the point-of-sale terminals, which are considered 'multipoint' entities, communicate data to a single centralized location, which is the home office.

This configuration allows for multiple terminals to transmit their data to one point, facilitating efficient communication and management of transactions. It is particularly useful in environments where numerous terminals need to report data or receive updates from a singular source, such as a home office overseeing several retail locations.

In contrast, point-to-point would imply a direct link between two devices, which is not suitable for a setup involving multiple terminals. Meanwhile, point-to-multipoint would enable a single transmitter to communicate with several receivers, but it does not align with the structure of terminals sending data back to a central office. Lastly, multipoint-to-multipoint would suggest that multiple terminals communicate with multiple other terminals, which does not fit the specific need of centralized reporting to a home office. Therefore, the multipoint-to-point configuration is the ideal model for this particular communication scenario.