Which term describes a message circuit between switching centers or message points?

The term that accurately describes a message circuit between switching centers or message points is "trunk." A trunk typically refers to a communication line or pathway that connects different segments of a network, facilitating the transmission of data, voice, or video between central points. In a telecommunications context, trunks are essential for carrying multiple signals simultaneously, allowing for efficient communication and resource sharing between network nodes.

In contrast, a link generally refers to a connection between devices or components, but it does not specifically denote a high-capacity circuit used for aggregate communication. Full-duplex refers to a communication channel that allows simultaneous transmission of data in both directions, but it does not specifically apply to the circuit designation between switching centers. Broadcast pertains to the transmission of messages to multiple recipients over a network, which is not a description of a circuit between points.

Understanding these distinctions helps clarify why "trunk" is the most relevant term for circuits specifically designed to connect switching centers or messaging points.