An IoT basic interview questions and answers, don't miss this one. In general, the Internet of Things refers to the act of connecting various devices to the internet; however, the way these connections are made is not always clear. The Internet of Things devices interact with one another and communicate using their own technological communication models.   An efficient communication model explains how the process works and provides insight into the many ways in which communication may be carried out. The Internet of Things (IoT) makes it possible for people and things (devices) to remain connected regardless of their location and makes it possible for them to use any network or service of their choice.  Models of communication available in several forms:  Request-Response Model  This communication architecture is known as the request-response model, and it is predicated on the idea that the client (the IoT Device) will make requests, and the server will answer to those requests. After receiving a request, the server will first determine what kind of answer it will offer, then it will retrieve the data that was requested, then it will prepare the response, and finally it will send it back to the client.   This approach is stateless since the data from individual requests are not kept between them; as a result, each request is processed in isolation from the others.  Publisher-Subscriber Model  The Publisher-Subscriber Paradigm is a communication model that includes all parties involved, including publishers, brokers, and consumers. Publishes, also known as data sources, are the ones responsible for sending data to subjects. Subscribers, also known as consumers, are responsible for monitoring and managing the topics that are being distributed by the broker.   There is a lack of communication between customers and publishers. The broker distributes the data for a subject to all of the customers who have subscribed to it as soon as they get it from the publisher. As a direct consequence of this, brokers are tasked with the responsibility of collecting data from publishers and distributing it to the relevant users.  Push-Pull Model  The Push-Pull Architecture is a kind of communication model in which data producers place their data in queues and data consumers get their data from those queues. There is no need for either the producer or the consumer to be aware of the other. The queues contribute to the decoupling of the messages between the many consumers and providers.   In the event that the pace at which data is pushed by producers and the rate at which it is pulled by consumers does not match, queues may also serve as a buffer for the data.  Exclusive-Pair Model  Model of the Exclusive Pair An exclusive pair is a kind of full-duplex, bidirectional communication model that was established for continual or continuous communications between a client and a server. Clients and servers are able to communicate with one another after a connection has been established.   The connection will be open until one of the clients initiates the process of closing it by sending a request to do so. The server is aware of all connections that are currently open.