What is a peripheral device?

A peripheral device refers specifically to an external device that connects to a computer to add functionality or enhance the capabilities of the system. This includes a wide range of devices such as printers, scanners, keyboards, mice, and external storage drives. The key aspect of peripheral devices is their role in extending the capabilities of the computer beyond its internal components, allowing users to perform various tasks that the computer alone could not achieve.

Unlike internal components, which are integral to the computer's core functions (like the CPU, RAM, and motherboard), peripheral devices are typically external and can be easily added or removed as needed. This external characteristic is what distinguishes them from components that are housed within the computer case. The other choices do not align with this definition, as they refer to either internal components essential for the computer’s operation, software applications, or data management systems rather than external enhancements to a computer's functionality.