Question

IoT Communication Protocols and their architecture name are given in the following table. Match List-I (Protocol Name) with List-II (Architecture).

• A. A - I, B - II, C - III, D - IV
• B. A - I, B - III, C - II, D - IV
• C. A - I, B - II, C - IV, D - III
• D. A - III, B - IV, C - I, D - II

Hint:

Associate IoT protocols with their web counterparts: CoAP is like a lightweight HTTP (Client-Server). AMQP is for reliable messaging queues (Bus/Broker). DDS is for high-performance real-time data sharing (P2P).

Answer 1

The Correct Option is A

Step 1: Match each protocol with its architecture.

(A) AMQP (Advanced Message Queuing Protocol): This is a publish-subscribe protocol that uses a central broker to pass messages between publishers and subscribers. The broker acts as a central message (I) Bus.
(B) CoAP (Constrained Application Protocol): This protocol is designed for constrained devices and is modeled on HTTP. It uses a request-response pattern, which is the hallmark of a (II) Client-server architecture.
(C) DDS (Data Distribution Service): This is a data-centric middleware standard for real-time systems. It operates without a central broker, allowing nodes to communicate directly. This is a (III) P2P (Peer-to-Peer) or publish-subscribe architecture.
(D) XMPP (Extensible Messaging and Presence Protocol): This is a protocol for instant messaging and presence. While it is client-server, its federated nature, where servers communicate with other servers, can be represented as a hierarchical or (IV) Tree structure.

Step 2: Combine the matches. The correct matching is A-I, B-II, C-III, D-IV.