M

Mr. Dubey • 52.30K Points
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Q. Which protocol interacts asynchronously over UDP?

(A) hmtp
(B) coap
(C) mqtt
(D) tcp/ip
Correct : Option (B)

Explanation: 
 coap is an application layer protocol (ietf draft) for resource constrained devices. it is asynchronous message interactions over udp, request/response semantics coap resources are identified by uniform resource identifiers.

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