Which IoT communication protocol is commonly used for device discovery and lightweight communication?

A. HTTP

B. CoAP

C. MQTT

D. TCP

Correct Answer is :

B. CoAP

Explanation

<p>CoAP is designed specifically for constrained devices and networks, typical in IoT environments.</p><p><br></p><p>It supports:</p><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>