Messaging protocols

AMQP (Advanced Message Queuing Protocol): An open standard [application layer protocol] for message-oriented middleware. AMQP allows for complex message routing configuration, including point-to-point, publish-subscribe, and store-and-forward patterns. AMQP is commonly used in enterprise environments. [RabbitMQ] is probably the most well known implementation of AMQP.

MQTT (Message Queuing Telemetry Transport): A lightweight publish-subscribe messaging protocol optimized for use in resource-constrained devices and low-bandwidth, high-latency, or unreliable networks. MQTT is often used in [Internet of Things (IoT)] and home automation applications. It is also used for some real-time data feeds, such as financial market data. A key feature is a Quality of Service (QoS) setting that allows for different levels of delivery assurance, eg. QoS 0 for "fire and forget" (deliver each message at most once), QoS 1 for acknowledged receipt, and QoS 2 for ensured no duplicates. [RabbitMQ] support MQTT as an alternative messaging protocol to AMQP via plugins. Mosquitto is an open-source, lightweight MQTT broker, while HiveMQ is a commercial MQTT broker. [Apache Kafka] can also integrate with MQTT through connectors and proxies.

STOMP (Simple (or Streaming) Text Orientated Messaging Protocol): A lightweight text-based messaging protocol. Unlike binary protocols, STOMP uses a text format for messages, which makes it easier to read and debug.