How many layers are involved in the application architecture discussed?

In the context of application architecture, particularly in systems like Avaloq, there are typically three layers that form the basis of the architecture. These layers are designed to separate concerns, enhance modularity, and support scalability and maintainability.

The three layers generally consist of the Presentation Layer, which manages the user interface and user interaction. This is where users interact with the system through graphical interfaces or APIs. The next layer is the Business Logic Layer, which contains the core functionality of the application, processing data and enforcing business rules derived from user interactions. Finally, the Data Layer is responsible for communication with the database, handling data storage and retrieval.

This architectural model is widely adopted in various software applications because it simplifies development and maintenance efforts by clearly defining roles for each layer. Understanding these layers helps developers and architects create robust systems that are easier to update and scale over time.