Which method sends bidirectional control commands between a controller and an AV device over the network?

The correct choice of Ethernet as the method that sends bidirectional control commands between a controller and an AV device over the network is based on its inherent capabilities for data transmission.

Ethernet is a networking technology that establishes local area networks (LANs) and supports communication between multiple devices. It allows for simultaneous two-way data transfer, making it ideal for applications requiring bidirectional control. This means that not only can the controller send commands to the AV device, but the device can also send status updates or feedback back to the controller over the same connection. This continuous exchange of information is crucial in modern AV setups where real-time communication is necessary for efficient operation and monitoring.

In contrast, Wi-Fi, while also capable of bidirectional communication, is more prone to issues like interference and range limitations compared to wired Ethernet connections. Serial communication typically operates in a unidirectional manner, sending commands from the controller to the device without a robust mechanism for returning data. USB connections are usually point-to-point, designed for direct connections between two devices and do not typically facilitate network-wide communication scenarios.

Thus, Ethernet stands out as the most effective method for enabling bidirectional control commands between a controller and AV devices over a network, supporting the seamless integration and operation of modern AV systems