What are the types of tiers?

Answered by Edward Huber

There are three types of tiers in a software architecture: the presentation tier, the application tier, and the data tier.

1. Presentation Tier:
The presentation tier is the user interface and communication layer of the application. It is where the end user interacts with the application and receives information. This tier is responsible for displaying data to the user in a visually appealing and user-friendly manner. It includes components such as web pages, mobile apps, and desktop applications. The main goal of the presentation tier is to provide a seamless and intuitive user experience.

In my personal experience, I have worked on developing the presentation tier for a web-based e-commerce application. This involved designing and implementing responsive web pages using HTML, CSS, and JavaScript. The challenge was to create a visually appealing and user-friendly interface that allowed users to easily navigate through products, add items to their cart, and complete the checkout process.

2. Application Tier:
The application tier, also known as the logic tier or middle tier, is the heart of the application. It contains the business logic and processing logic of the application. This tier is responsible for processing user requests, performing calculations, and making decisions based on the data received from the presentation tier. It acts as a bridge between the presentation tier and the data tier.

In my experience, I have developed the application tier for a banking application. This involved implementing various functionalities such as account management, transaction processing, and interest calculations. The application tier handled the validation of user inputs, performed the necessary calculations, and interacted with the data tier to retrieve and store data.

3. Data Tier:
The data tier is responsible for storing and retrieving data. It includes databases, file systems, and other data storage mechanisms. This tier is responsible for ensuring data integrity, security, and availability. It handles the storage and retrieval of data requested by the application tier and provides a means for data persistence.

In my previous project, I worked on designing and implementing the data tier for a customer relationship management (CRM) system. This involved creating a database schema, defining tables and relationships, and implementing SQL queries to retrieve and manipulate data. The data tier was crucial in storing customer information, tracking interactions, and generating reports.

The three tiers in a software architecture are the presentation tier, application tier, and data tier. Each tier has a specific role and responsibility in the overall functioning of the application. The presentation tier handles user interaction, the application tier contains the business logic, and the data tier manages data storage and retrieval.