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MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol designed for IoT. It works on a publish-subscribe model, minimizing network bandwidth usage. MQTT is ideal for resource-constrained devices due to its minimal overhead and efficient communication over unreliable networks. Example: An IoT device like a smart thermostat publishes temperature data to an MQTT broker, which then forwards it to subscribed clients. ________________________________________ Why Other Options Are Incorrect: 1. HTTP: HTTP is heavier and not optimized for low-power IoT devices. 2. FTP: FTP is used for file transfer, unsuitable for real-time IoT communication. 3. SOAP: SOAP is a verbose protocol primarily used in web services, unsuitable for constrained environments. 4. SMTP: SMTP is for email transfer and lacks IoT-specific optimizations.
Train A running at speed of 162 km/hr crosses a platform having twice the length of train in 22 sec. Train B whose length is 760m crosses same platform ...
A 400 m long train crosses a platform twice its length in 2 min. Find the speed of the train.
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A train crosses a pilar in 20 seconds and a platform of length 300 metres in 25 seconds,then what will the 120% of the length of the train.
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Two trains, whose respective lengths are 120 metres and 180 metres, cross each other in 15 seconds when they are moving in opposite directions and in 5...
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100 metre long train ‘A’ can cross a platform of length 50 metres in 20 seconds. If the speed of train ‘B’ is 6 m/s more than that of train ‘A...
A train after travelling 150 km meets with an accident and then proceeds at of its former speed and arrives at its destination 8 hrs late. Had the accid...