Which device connects the workstation (POS) and manages the EPS process?

The correct choice is related to the function and importance of a Single Board Computer (SBC) in managing Electronic Payment Systems (EPS) at a Point of Sale (POS) workstation. A Single Board Computer integrates all the necessary components of a computer onto a single circuit board, including a processor, memory, and I/O interfaces. This compact and efficient design allows it to manage the electronic transaction process seamlessly.

In the context of a POS system, the SBC is responsible for handling various tasks, such as processing payment data, communicating with payment terminals, and ensuring secure transaction management. It coordinates data flow between the POS workstation and external devices, facilitating the EPS process effectively.

Other options do not fulfill the specific function needed for managing the EPS process. A motherboard is a crucial component of a computer that houses the CPU and connects various peripherals, but it does not independently handle the EPS management. A network hub simply serves as a device that connects multiple networked devices but does not process or manage payment information. The power supply provides electricity to the systems, but it does not play a direct role in managing data or transactions. Thus, the Single Board Computer is the most suitable answer for connecting the workstation and managing the EPS process.