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      Question

      Which protocol is most commonly used for secure

      communication between IoT devices over the internet?        
      A HTTP Correct Answer Incorrect Answer
      B FTP Correct Answer Incorrect Answer
      C MQTT Correct Answer Incorrect Answer
      D SMTP Correct Answer Incorrect Answer
      E SNMP Correct Answer Incorrect Answer

      Solution

      MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol optimized for use with low-bandwidth, high-latency, or unreliable networks, making it ideal for IoT applications. It uses a publish-subscribe model to facilitate efficient communication between IoT devices. MQTT is preferred in IoT due to its minimal overhead and support for intermittent connectivity. a) HTTP is not specifically designed for low-bandwidth scenarios and is heavier compared to MQTT. b) FTP is used for file transfer and is not suitable for real-time or lightweight communication in IoT. d) SMTP is a protocol for email transmission, not for IoT communication. e) SNMP is used for network management and monitoring, not for IoT communication.

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