What is the maximum number of serial ports the Commander Site Controller can have with an additional 8 Port Serial Card installed?

To understand why the option indicating a maximum of 24 serial ports is correct, it's important to consider the standard configuration of the Commander Site Controller and the functionality provided by the additional 8 Port Serial Card.

Typically, the Commander Site Controller comes with a base number of serial ports already integrated into the system. When an additional 8 Port Serial Card is installed, it adds 8 more serial ports to the existing configuration.

If the base model, for example, has 16 serial ports, then adding an 8 Port Serial Card brings the total to 24 (16 existing + 8 additional = 24). Therefore, when considering the advancements in the technology and the potential maximum configurations, the answer indicating a total of 24 accounts for the capabilities of both the base unit and the additional hardware option.

This comprehensive understanding of the hardware capabilities and expansion possibilities within the system informs why 24 is the maximum number of serial ports that can be supported when the additional card is utilized.