1. What are the different QoS levels that MQTT provides? Provide an explanation of when you would use each of the QoS levels.

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2. MQTT uses TCP under the hood. Why then would MQTT include QoS when TCP provides reliability?

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3. What are some benefits of using MQTT (provide 2 examples)? What are some disadvantages of using MQTT (provide 2 examples)?

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4. What are some commercial products that use MQTT (provide 2). Why do you think the company decided to use MQTT for that product?

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