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An interface is the point of interaction or connection between two different systems, components, or a user and a system. It can be a physical port like a USB connection, or a software-based boundary like a Graphical User Interface (GUI) that allows a person to interact with a computer, or an Application Programming Interface (API) that lets two programs communicate with each other.

Types of interfaces

User Interface (UI): The part of the system that allows a human to interact with the computer.

Graphical User Interface (GUI): Uses visual elements like windows, icons, and menus.

Command-Line Interface (CLI): Uses text-based commands to operate the system.

Hardware Interface: A physical connection between hardware components, such as cables, ports, and connectors like USB, Ethernet, or PCI.

Software Interface (API): A set of rules and protocols that enables different software components to communicate and exchange data.

Network Interface: Connects a computer to a network to allow communication with other computers.