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In the publish–subscribe model, subscribers typically receive only a subset of the total messages published. The process of selecting messages for reception and processing is called filtering. There are two common forms of filtering: topic-based and content-based. In a topic-based system, messages are published to "topics" or named logical ...
Information and communications technology (ICT) is an extensional term for information technology (IT) that stresses the role of unified communications [1] and the integration of telecommunications (telephone lines and wireless signals) and computers, as well as necessary enterprise software, middleware, storage and audiovisual, that enable users to access, store, transmit, understand and ...
The subscription business model is a business model in which a customer must pay a recurring price at regular intervals for access to a product or service.The model was pioneered by publishers of books and periodicals in the 17th century, [1] and is now used by many businesses, websites [2] and even pharmaceutical companies in partnership with governments.
A data center is a pool of resources (computational, storage, network) interconnected using a communication network. [1] [2] A data center network (DCN) holds a pivotal role in a data center, as it interconnects all of the data center resources together.
In the first, a central server acts as the mechanism that provides integration services, whereas with the latter, the message broker is a communication backbone or distributed service that acts on the bus. [3] Additionally, a more scalable multi-hub approach can be used to integrate multiple brokers. [3]
Many models of communication include the idea that a sender encodes a message and uses a channel to transmit it to a receiver. Noise may distort the message along the way. The receiver then decodes the message and gives some form of feedback. [1] Models of communication simplify or represent the process of communication.
A personal communications service (PCS) is set of communications capabilities that provide a combination of terminal mobility, personal mobility, and service profile management. [1] This class of services comprises several types of wireless voice or wireless data communications systems, typically incorporating digital technology, providing ...
AMQP is a binary application layer protocol, designed to efficiently support a wide variety of messaging applications and communication patterns. It provides flow controlled, [3] message-oriented communication with message-delivery guarantees such as at-most-once (where each message is delivered once or never), at-least-once (where each message is certain to be delivered, but may do so ...