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Table of contents
1.
Introduction
2.
What is AMQP Protocol
3.
AMQP Architecture
4.
How does AMQP work?
5.
Advantages Of AMQP Protocol
6.
Frequently Asked Questions
6.1.
What are the key characteristics of AMQP?
6.2.
How is AMQP different from MQTT?
7.
Conclusion
Last Updated: Mar 27, 2024
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AMQP Protocol

Author Akash Nagpal
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Introduction

IoT communication protocols are methods of communication that secure and maintain the highest level of security for data sent between connected devices.

The Internet of Things devices is often linked to the Internet over an IP (Internet Protocol) network. Bluetooth and RFID, on the other hand, enable IoT devices to communicate locally. There is a variation in power, range, and memory employed in these circumstances.

Connections over IP networks are more complicated, necessitating more memory and power from IoT devices, whereas range is not an issue. Non-IP networks, on the other hand, use less power and memory but have a shorter range.

In this blog we will learn about AMQP Protocol in IoT environment.

What is AMQP Protocol

AMQP is an open protocol for asynchronous message queuing that has been developed and evolved over several years.

AMQP is an open standard binary application layer protocol created for message-oriented middleware. The AMQP protocol standardises messaging by utilising Producers, Brokers, and Consumers, and messaging enhances loose coupling and scalability.

The AMQP protocol was designed to allow a wide range of applications and systems to communicate with one another, regardless of their internal architecture, hence standardising business communications on an industrial scale. The OASIS industry standards group1 has chosen the AMQP protocol to become an ISO/IEC standard. The AMQP protocol is nearly a complete superset, except for explicit protocol support for Last-Value-Queues and will messages. However, its planned extensible design, which combines an IANA-like approach with a discursive process, assures that such features may be introduced in a forward-compatible, broadly agreed-upon manner.

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AMQP Architecture

  • The distinction between MQTT and AMQP is that AMQP brokers have two parts: exchanges and queues. Exchange and queuing are both bound together.
  • Client applications are referred to as producers ("publishers") in this architecture, while the AMQP server is referred to as the broker. Client apps generate messages, which are sent to the broker. Messages are routed and queued in the broker. Consumers read them from the queues where they are processed. These client apps are referred to as consumers ("subscribers").

 

  1. The exchange is where publishers distribute messages. The messages contain routing keys that the "exchange" module uses to route them (i.e. messages). There are several exchange mechanisms, including default, direct, fanout, topic, and header exchange.
  2. Queues are where messages are held until they are delivered to or received by subscribers.
  3. Default trade: Message routing to a queue (routing key = queue name)
  4. Direct exchange: Message routing to a queue based on routing key (no queue name required, routing key Equals bind-key)
  5. Fanout exchange: Routing messages to several queues (publish/subscribe) without using a routing key.
  6. Subject exchange: Messages are routed to a queue based on a routing key, such as a topic (routing key match a pattern)
  7. Header exchange: Message routing to queue based on header filters
     

A frame is the fundamental data unit in AMQP. They are used to start, regulate, and terminate message transfers between two peers. These are the nine AMQP frame bodies:

  1. be open (the connection) 
  2. begin (the session) 
  3. affix (the link) 
  4. transfer 
  5. flow 
  6. temperament 
  7. separate (the link) 
  8. final (the session) 
  9. final (the connection)

Also see, Difference Between Verilog and Vhdl

How does AMQP work?

Let's have a look at how AMQP works. AMQP operates with both publishers and consumers. The publishers create the messages, and the consumers take them up and process them. It is the responsibility of the message broker (such as RabbitMQ) to guarantee that messages from a publisher are delivered to the appropriate consumers.

To do this, the broker employs two crucial components:

  1. Exchanges
  2. Queues.

 

As you can see, the setup is rather simple. Depending on the arrangement, a publisher sends messages to a designated exchange, and a consumer gets messages from a queue, or the queue pushes them to the consumer.

The connections must be created first, so how do publishers and consumers find each other? The answer is via the exchange's name.

Typically, either the publisher or the consumer initiates the exchange with a provided name, subsequently made public.

To know about Instruction Format in Computer Architecture here. 

Advantages Of AMQP Protocol

  • It employs QoS to ensure the secure transmission of critical data.
  • AMQP employs the same publish/subscribe architecture as the MQTT protocol for data exchange.
  • Because it employs a wire-level protocol that provides data as a stream of bytes, it assures compatibility.
  • It facilitates peer-to-peer communication while also acting as an intermediary.
  • The protocol has room to grow to operate with multiple standards.
  • It provides users with secure connections using SSL protocols like CoAP, MQTT, HTTP, and XMPP.

You can also read about - Lock based protocol in DBMS

Frequently Asked Questions

What are the key characteristics of AMQP?

Message orientation, queuing, routing (including point-to-point and publish-and-subscribe), dependability, and security are key characteristics of AMQP

How is AMQP different from MQTT?

MQTT is built on a client/broker architecture, whereas AMQP is built on a client or broker and a client or server architecture. MQTT adheres to the publishing and subscription abstractions, whereas AMQP adheres to the response or request and publish or subscribe techniques.

Conclusion

In this article, we have extensively discussed AMQP Protocol in IoT Environment. We have also discussed the features, functions, and advantages of AMQP. We hope this blog has helped you enhance your knowledge regarding AMQP Protocols in the IoT environment. Some official documentation on big data that can help you improve your understanding is Actuators in IoT.

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If you would like to learn more, check out our articles on Actuators in IoT, and Sensors and Actuators.  Practice makes a man perfect. To practice and improve yourself in the interview, you can check out Top 100 SQL problemsInterview experienceCoding interview questions, and the Ultimate guide path for interviews.

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