Which of the following statements is true about network protocols used with PLCs?

Network protocols play a critical role in the communication between Programmable Logic Controllers (PLCs) and other devices in automation systems. Ethernet and USB are indeed commonly used protocols in this context, making the statement true.

Ethernet is widely adopted due to its speed, flexibility, and ability to support a wide range of devices on a single network. It allows for real-time data exchange and can easily connect multiple PLCs, sensors, and control systems over a local area network. This communication facilitates remote monitoring and control, which is essential for modern automation functions.

USB, while traditionally considered more of a direct device connection interface, is also utilized for connecting PLCs to computers for programming, data transfer, and diagnostics. It provides a straightforward and efficient means to set up communication between the PLC and other devices, making it a valuable protocol for specific applications.

In contrast, the other options present inaccuracies regarding the capabilities and options for PLC communication. Relying solely on USB would limit the networking flexibility and scalability that is often required in industrial settings. Suggesting that wireless is the only option overlooks the widespread use and advantages offered by wired protocols like Ethernet. Lastly, stating that no protocols are necessary is fundamentally incorrect, as protocols are essential for enabling effective communication and operation of