Which diagram specifically shows the connections of installations or component devices?

The correct answer is 'Connection' because this type of diagram is dedicated to illustrating how various installations or component devices are interconnected. It conveys a clear representation of the physical connections and relationships between different parts of a system, differentiating it from other diagram types that may emphasize other aspects, such as function or logic flow.

Understanding this type of diagram is essential as it helps technicians and engineers visualize the layout and wiring of components, ensuring that installations are conducted properly and enabling effective troubleshooting when issues arise. In contrast, schematic diagrams typically represent the functionalities and operations of a system rather than the specific connections, while interconnection diagrams focus more on the general linking rather than detailed physical wiring. Extraction diagrams do not pertain to connections at all, as they are generally concerned with the process of removing data or components from a system.