3-tier architecture in web development

3-tier architecture in web development

1. Presentation Layer (also known as the User Interface or UI)

• This layer is the topmost layer and is responsible for presenting information to the user and gathering user inputs.
• It consists of the user interface components such as web pages, forms, graphical interfaces, etc.
• The presentation layer communicates with the other layers to retrieve and display data, but it does not handle business logic.

2. Application Layer (also known as the Business Logic Layer)

• The application layer is where the business logic of the application resides. It processes the data received from the presentation layer, performs necessary operations, and interacts with the data layer for data retrieval and storage.
• This layer implements the rules and regulations that govern the application’s functionality.
• It is responsible for validation, authentication, authorization, and other business-specific logic.

3. Data Layer (also known as the Data Access Layer)

• The data layer is responsible for managing the storage and retrieval of data from persistent data sources, such as databases, files, or external services.
• It abstracts the underlying data storage mechanisms from the rest of the application layers, providing a consistent interface for data manipulation.
• This layer handles tasks such as querying databases, executing CRUD (Create, Read, Update, Delete) operations, and managing transactions.

Benefits of Three-Tier Architecture:

• Scalability: Each layer can be scaled independently based on demand, allowing for better resource utilization.
• Modularity: The separation of concerns into distinct layers promotes code reusability and maintainability.
• Flexibility: Changes to one layer typically don’t require changes to the other layers, making the system more adaptable to evolving requirements.
• Security: By separating concerns, it’s easier to implement security measures at appropriate layers, such as authentication and authorization.

Conclusion: Overall, the three-tier architecture provides a clear separation of concerns, making it easier to develop, maintain, and scale web applications.