A 3-tier architecture, also referred to as a three-tier software architecture, is a commonly used structure for software application development. This architecture consists of three layers, each of which performs specific functions and tasks.

The first layer, also called the presentation layer or user interface, is responsible for the presentation and interaction with the user. This is where the visual elements of the application are created, such as user interfaces, menus, and forms. The presentation layer allows users to interact with the software and provide input.

The second layer, also called the logic layer or business layer, contains the actual logic and functionality of the application. This is where the data processing, calculations and business rules are implemented. The logic layer ensures that the application performs the required operations and generates the desired results.

The third layer, also known as the data layer or database, is responsible for storing and managing data. This is where the databases and file systems are set up to store the persistent data of the application. The data tier provides access to stored information and ensures that data is managed consistently and securely.

A 3-tier architecture provides numerous benefits, including clear separation of responsibilities, improved application maintainability and scalability, and enhanced security. By dividing the software into separate tiers, each tier can be developed, tested and updated independently of the others.

In summary, a 3-tier architecture, also known as a three-tier software architecture, is a common structure for developing software. By dividing the application into presentation layer, logic layer and data layer, this architecture enables efficient development, maintenance and scaling of software applications.

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