Virtual Labs

Which MQTT message type is used to subscribe to a topic and receive live updates from the broker?

a: PUBLISH Explanation

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b: SUBSCRIBE Explanation

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c: CONNECT Explanation

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d: DISCONNECT Explanation

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What is the role of the **Quality of Service (QoS)** level in MQTT?

a: It defines the frequency of message transmission Explanation

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b: It determines the message retention period Explanation

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c: It defines the reliability of message delivery Explanation

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d: It specifies the message format Explanation

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Simulation of sending live sensors data on IoT Platform using MQTT Protocols and ESP8266/ESP32.