Internet of Things (IoT) Practice Exam

Which communication protocol is often associated with lower power usage in IoT applications?

1. Zigbee

2. WiFi

3. Bluetooth Classic

4. MQTT

The correct answer is: Zigbee

Zigbee is a communication protocol specifically designed for low-power usage in IoT applications. It is based on an open standard and offers a way to create personal area networks with low data rates over a small range, making it well-suited for devices that require long battery life and are often used in sensor networks and home automation. The key features of Zigbee include its ability to support many devices in a mesh network, which can extend the range and effectiveness of the network without significantly increasing power consumption. This makes Zigbee ideal for applications where devices need to operate over extended periods without frequent battery replacements. The protocol typically operates in the 2.4 GHz frequency range and has mechanisms to minimize energy consumption, such as allowing devices to enter sleep modes when not actively transmitting data. In comparison, other options like WiFi generally consume more power due to their higher data rates and requirements for continuous connectivity. Bluetooth Classic, while more efficient than WiFi, is still not as low-power as Zigbee, especially in applications where devices are frequently sending small bits of data. MQTT, on the other hand, is a lightweight messaging protocol designed for low-bandwidth, high-latency connections, but it is not a physical communication protocol like the others mentioned; it