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    Question

    Internet of Things (IoT) In an IoT ecosystem, which

    protocol is most efficient for constrained devices communicating over lossy networks?
    A HTTP Correct Answer Incorrect Answer
    B MQTT Correct Answer Incorrect Answer
    C FTP Correct Answer Incorrect Answer
    D Telnet Correct Answer Incorrect Answer
    E SOAP Correct Answer Incorrect Answer

    Solution

    MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol designed specifically for IoT devices operating in resource-constrained environments. It uses a publish-subscribe model, allowing devices to send and receive messages via a central broker. MQTT is highly efficient due to its minimal bandwidth requirements, making it ideal for lossy or unreliable networks. It is widely used in IoT applications like home automation, healthcare monitoring, and connected vehicles. Features like Quality of Service (QoS) levels and persistent session support further enhance its reliability in constrained environments. Why Other Options Are Incorrect:

    • A) HTTP is verbose and resource-intensive, unsuitable for constrained IoT devices.
    • C) FTP focuses on file transfers, which are not optimized for real-time communication in IoT systems.
    • D) Telnet is a text-based protocol for remote device access, lacking the lightweight efficiency required for IoT.
    • E) SOAP is a heavy XML-based protocol used for enterprise-level applications, unsuitable for IoT’s bandwidth-constrained environments.

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