Internet of Things (IoT) Practice Exam

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Which protocol is commonly used for IoT communication?

HTTP
FTP
MQTT
SMTP

The correct answer is: MQTT

The protocol commonly used for IoT communication is MQTT (Message Queuing Telemetry Transport). MQTT is specifically designed to connect devices with minimal bandwidth and low power consumption, making it ideal for IoT applications. It operates on a publish-subscribe model, allowing devices to send and receive messages efficiently. This lightweight nature and efficient message handling facilitate the communication between devices, especially in environments where network bandwidth is limited. In contrast, HTTP (HyperText Transfer Protocol) is more resource-intensive and better suited for web applications, while FTP (File Transfer Protocol) is primarily used for transferring files rather than for real-time communication between devices. SMTP (Simple Mail Transfer Protocol) is focused on sending emails and is not suited for the dynamic and frequent communication needs of IoT devices. Therefore, MQTT stands out as the protocol of choice for efficient and effective IoT communication.