Which statement is true in concern with Request-response IoT communication model?

अनुरोध-प्रतिक्रिया IoT संचार मॉडल के संबंध में कौन सा कथन सत्य है?

Each Request-response pair is dependent of others

Request – response is a stateless communication model

Client server architecture of Request-response uses queues

In Request-response publisher is a client and broker are server.

Explanation: