What is defined as a shared boundary through which information is exchanged between two persons or systems?

The term that describes a shared boundary through which information is exchanged between two persons or systems is "Interface." In the context of systems and communication, an interface serves as the point of interaction where data is transmitted and received. It can encompass various formats of communication, including verbal exchanges between individuals or technological exchanges between systems, such as hardware or software interfaces.

For example, in software development, an application programming interface (API) is a specific type of interface that defines the methods and data formats that applications can use to communicate with each other. This aligns with the concept of an interface being a clear boundary that facilitates the flow of information while also managing how that information is structured and used.

Other terms like "Channel," "Connection," and "Interaction" have their own meanings in communication and systems. A channel typically refers to the medium through which the information is conveyed, a connection describes the linking aspect itself, and interaction is more about the actions that occur during communication rather than the structural boundary. Thus, "Interface" is the most precise term that captures the essence of a shared boundary for information exchange.