What characterizes a client-server application as a two-tier architecture?

A two-tier architecture in a client-server application refers to a model where the application logic is divided into two distinct layers: the client layer and the server layer. In this setup, the application runs predominantly on the client computer, which is responsible for the user interface and client-side processing. On the other hand, the database layer resides on a server, managing the data storage, retrieval, and processing tasks.

This division allows for a clear distinction between the client-side user interface and the server-side data management. Users interact with the client application to perform tasks such as entering or querying data, while the server processes these requests and manages the database.

The definition emphasizes the separation of concerns, making the architecture efficient for scenarios where client devices handle the front-end processing and servers handle back-end data management. In contrast, other models, such as three-tier architecture, would introduce an additional layer for application logic between the client and the database server.