Which of the following statements is true about the source Network Structure?

The correct statement regarding the source Network Structure is that it outlines the set of fields usable in MSG STRUCT sources. In the context of the Avaloq Message Interface, the source Network Structure is integral as it defines the schema for how messages are structured, including which fields can be utilized. This structure is essential for ensuring that the messaging system operates efficiently and conforms to necessary specifications for data interchange between systems.

The other statements refer to different aspects of network communication and message handling but do not accurately describe the role of the source Network Structure. For instance, while protocols for data transmission are indeed crucial, they pertain to how data is sent and received rather than the specifics of MSG STRUCT fields. Similarly, user permissions for message retrieval and redundancy in message formats are important considerations but fall outside the scope of what the source Network Structure specifically addresses. Understanding that the source Network Structure is fundamentally about defining message fields helps in grasping the overall architecture of the messaging interface.