What is a primary function of the Public Switched Telephone Network (PSTN)?

The Public Switched Telephone Network (PSTN) primarily operates by establishing dedicated channels for voice communication between two points. This system is designed for switching calls and establishing a temporary connection that allows users to communicate in real time. The architecture of the PSTN relies on a circuit-switched model, meaning that a specific and exclusive path is created through the network for the duration of a call, ensuring a consistent quality of service, which is crucial for voice communication. This function is fundamental to traditional telephony, enabling users to make calls reliably and effectively across various geographic locations.

While other options mention functions that are part of different technologies or services—such as internet connections, cloud storage, or encryption—they do not pertain specifically to the primary capabilities of the PSTN. This emphasizes the importance of understanding the core operations of communication networks, especially in distinguishing between various services and their roles in modern telecommunications.