Network Defense Essentials (NDE) 2025 – 400 Free Practice Questions to Pass the Exam

The most suitable protocol for enabling communication between sensors and their controllers in IoT devices is Zigbee. This protocol is specifically designed for low-power, low-data-rate communications in short-range scenarios, making it ideal for environments where energy efficiency is critical, such as in many IoT applications.

Zigbee operates in the IEEE 802.15.4 standard frequency bands and supports mesh networking, which enhances communication reliability across multiple devices, extending the operational range of the network. This feature is particularly advantageous in IoT ecosystems where devices may be spread out, and not all can maintain a direct connection with a controller. Zigbee also allows for a large number of devices to be connected within a network, supporting environments where many sensors need to communicate simultaneously.

While Bluetooth and Wi-Fi are more widely recognized for connecting devices, they are not specifically tailored for the constraints typically found in IoT implementations, such as low power consumption and the need for communication in dense networks. ANT is a protocol primarily used for real-time data transfer, often in fitness and health devices, but it does not hold the same breadth of application as Zigbee in the broader IoT context.

Thus, Zigbee stands out as the most appropriate wireless sensor protocol for the communication requirements in