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QusWhich IoT communication protocol is commonly used for device discovery and lightweight communication? Qusडिवाइस डिस्कवरी और लाइटवेट संचार के लिए आमतौर पर किस IoT संचार प्रोटोकॉल का उपयोग किया जाता है?

A. HTTP
B. CoAP
C. MQTT
D. TCP

Solution

B. CoAP

Explanation

CoAP is designed specifically for constrained devices and networks, typical in IoT environments. It supports:<ul><li>Lightweight communication over UDP</li><li>Low power consumption</li><li>Device discovery using multicast support</li><li>RESTful architecture (similar to HTTP but lighter)</li></ul>