In the three-tier architecture, the intermediate layer between database and client servers is classified as

In the three-tier architecture, the intermediate layer between the database and client servers is classified as the Application Server or Business Logic Layer.

Here's a step-by-step breakdown:

1. The first tier in this architecture is the Database Server. This is where the data is stored and managed.

2. The second tier is the Application Server or Business Logic Layer. This is the intermediate layer that communicates with both the client servers and the database. It contains the business logic that dictates how data can be created, displayed, stored, and changed.

3. The third tier is the Client Server, also known as the Presentation Layer. This is where the data or the results of the business logic are presented to the user. The client server interacts with the application server to access the data stored in the database server.

So, in the context of your question, the intermediate layer between the database and client servers is the Application Server or Business Logic Layer.