Why is MQTT used in IoT?

Residing on top of the TCP/IP network stack, MQTT is a lightweight publish/subscribe messaging protocol designed for low-bandwidth, high latency, unreliable networks. MQTT’s features make it an excellent option for sending high volumes of sensor messages to analytics platforms and cloud solutions.

What is the difference between MQTT and Websockets?

Key Differences of MQTT vs WebSocket. WebSocket servers can send messages to clients/groups of clients. They are always open channel for bidirectional data transfer without request for open and close like HTTP. While MQTT defines how different machines can talk to each other, they can talk to the same channel.

Why is IPv6 preferred over IPv4 for IOT implementations?

IPv6 has an address space of 128 bits (which is 4 times larger than IPv4) and can accommodate large no. of devices. Apart from providing a large address space IPv6 provides security features like authentication and privacy to thwart increasing cyber crimes.

Is MQTT a standard protocol used for IoT?

An MQTT (Message Queuing Telemetry Transport) is a lightweight IoT data protocol. Despite MQTT’s wide adaptation – most notably as an IoT standard with industrial applications – it doesn’t support a defined data representation and device management structure mode.

Does MQTT use WebSockets?

In MQTT over WebSockets, the MQTT message (for example, a CONNECT or PUBLISH packet) is transferred over the network and encapsulated by one or more WebSocket frames. WebSockets are a good transport method for MQTT because they provide bi-directional, ordered, and lossless communication (WebSockets also leverage TCP).

How is COAP different from HTTP?

HTTP is mainly used for viewing web pages. Coap is a simplified version of HTTP for IoT or WSNs. Although COAP is based on UDP, it should have ACK messages to emulate TCP. Since COAP is simpler than HTTP, it will have lower latency and draw less power.

What are the advantages of MQTT protocol in IoT applications briefly explain MQTT protocol in IoT Infrastructure?

The benefits of MQTT include:

• Lightweight code footprint: Devices need only a few lines of code in order to get up and running with the MQTT protocol.
• Minimized data packets: MQTT is very energy-efficient.
• Speed: MQTT operates in real time, with no delays outside of QoS.