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2025-2026 LABORATORI DE SENSORS I TECNOLOGIES MÒBILS (17244132, 17244226, 17254125, 17924132)
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You connect to a broker with the clean session flag set to false, and subscribe to the topic house/sensor1 with QOS 0.You then disconnect, and after about 10 minutes you reconnect with the same client. If another client publishes messages on house/sensor1 with QOS 1 while you are disconnected. What happens when you reconnect?
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Who created MQTT?
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Messages sent to an MQTT broker are encrypted by default?
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Does MQTT support security?
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You must always start your topic hierachy with a / e.g. /topic name?
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You can subscribe to multiple topics at once using wild cards?
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You connect to a broker with the clean session flag set to false, and subscribe to the topic house/sensor1 with QOS 1.You then disconnect, and after about 10 minutes you reconnect with the same client. If another client publishes messages on house/sensor1 with QOS 1 while you are disconnected. What happens when you reconnect?
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An MQTT broker can use any port, but by default it uses port 1883?
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What are the key components of a M2M system?
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MQTT-SN uses
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