Which of the following has an easy-to-use button interface for handling simple AV functions over a standard Ethernet network?

The MediaLink Plus Series Controllers are specifically designed to provide an intuitive and user-friendly button interface for managing simple audio-visual functions over a standard Ethernet network. Their primary focus is to streamline AV control in various environments, such as classrooms and conference rooms, where users may not be technically savvy. The controllers offer a straightforward way to manage sources like projectors, displays, and other devices with minimal setup or training required, which is a significant advantage in user-centric applications.

While the other options may have their specific functions and features, they do not typically emphasize the ease of use through a dedicated button interface in the same way. The AV Control Panel may provide more in-depth control but might not offer the same level of simplicity and accessibility for basic functions. The Smart AV Switcher is concentrated on switching capabilities rather than user interface simplicity, and the Networked AV Receiver focuses more on streaming and connectivity rather than providing a straightforward control interface. Thus, the MediaLink Plus Series stands out as the most suitable choice for its intended purpose.