Which model does the Streaming API utilize for notifications?

The Streaming API utilizes the publish-subscribe model for notifications. This model allows clients to subscribe to specific channels or topics, which are associated with particular events or changes in data. When an event occurs that matches the subscribed criteria, the system sends a notification to all active subscribers without them needing to request it actively. This decouples the producers of events from their consumers, enhancing the efficiency of real-time updates.

In contrast, the request-response model involves a direct query from a client, followed by a response from the server, which is not suited for real-time event notifications. The RESTful model does provide a way to interact with data via HTTP requests, but it does not inherently support real-time notifications like the publish-subscribe model does. Similarly, the SOAP model revolves around structured messaging, which lacks the direct feed capabilities offered by the Streaming API. Therefore, the publish-subscribe model is the most fitting choice for the functionality provided by the Streaming API in terms of efficient and real-time communication between systems.