What function does a port serve in a computer system?

A port serves a crucial role in a computer system by acting as a point of connection for external peripheral devices. This includes devices such as printers, keyboards, mice, and external storage drives. Ports allow these devices to communicate with the computer, facilitating the transfer of data and commands between the computer system and the peripherals. By providing these connections, ports enable users to expand the functionality of their computer systems and enhance their overall experience.

The other functions mentioned in the options do not align with what a port is designed to do. Processing internal data, running the operating system, and transforming signals for wireless communication are tasks managed by different components within a computer, such as the CPU, operating system software, or wireless communication hardware. Thus, the role of a port as a connector for external devices distinctly categorizes it as an essential component in a computer system's architecture.