Question

Needs information about these Questions of almost 400 words atleast

What is MQTT?

Why MQTT?

How does it work?

MQTT Archictecture

Advantages of mqtt

Conclusion

Answer 1

MQTT or Message Queuing Telemetry Transport is a lightweight data centric protocol used to transport messages between devices with limited bandwidth. It is standardized by OASIS and is open source. It is generally used for remote connection communication where small code is required. It is used for data exchange and messaging in IOT technologies. It   

MQTT was designed for sensors, actuators and phones to transfer data from these mobile devices to the server and then to different receivers in case of limited bandwidth, lag/latency or unstable connections. It is made with a goal of lightweight, bandwidth-efficient and low energy consumption to ensure optimal communication on remote connections.

Working-

MQTT working is based on connect, publish/subscribe, disconnect based paradigm where senders are publishers and receivers are subscribers and data is divided into classes or topics and subscribers choose interested classes to receive those messages only. It starts with TCP/IP connection. Broker is the server which connects the devices.

Architecture-

MQTT is a model in which sensor is a client which connects to server called broker over TCP and devices are receivers. Every data message is a chunk of data hidden to the broker which is published to different topics. Publishers send data to broker and subscribers subscribed to the particular topic get the messages of that topic only.  

Advantages-

MQTT provides TLS/SSL internet security for encrypted and secure transmission of data. It is a lightweight protocol which is 2 bytes header which is thousand times less than 8000 bytes header of TCP. Less processing overhead for clients due to presence of broken which acts as server reducing the packets usage.

It is well suited for IOT devices where the demand of low memory and low processing power devices is fulfilled by this protocol. It also operates at lowest possible energy which saves lot of battery life.  

Just like TCP handshaking, MQTT also ensures message delivery. It ensures reliability in case of unstable IOT connections. The subscriber doesn't need to be always connected in order to receive data messages.

Conclusion-

MQTT with features such as open source, easy to use and implement makes it a perfect choice for communication in IOT and other applications. In age of IOT, M2M and other advanced technologies with endless operations, MQTT provides a great performance boost in messaging and handling multiple things at once. It is going to be even more popular in upcoming years.