Which characteristic is essential for a 'point-to-point' network?

A point-to-point network is defined by its structure, which features direct connections between two endpoints or stations. This characteristic is fundamental because it allows for straightforward communication and data transfer between those specific points without the need for intermediary devices or multiple routing paths. The simplicity of a point-to-point connection effectively enhances the efficiency of data transmission and minimizes delays, making it ideal for dedicated communications.

While the other options describe different aspects of network design or functionality, they do not align with the defining feature of a point-to-point network. For example, a reliance on a single hub suggests a different kind of network architecture, often associated with hub-and-spoke models that typically centralize communication through one major node instead of maintaining direct connections. Flexibility in destination choices implies the possibility of multiple routes or connections, which contrasts with the singular nature of point-to-point links. Lastly, a high volume of international traffic pertains to specific operational considerations rather than the fundamental characteristics of the network's structure, making it not essential to defining a point-to-point network.