The Three Tiers In Detail
Presentation Tier
It is the user interface and topmost tier in the architecture. Its purpose is to take request from the client and displays information to the client. It communicates with other tiers using a web browser as it gives output on the browser. If we talk about Web-based tiers then these are developed using languages like- HTML, CSS, JavaScript.
Application Tier
It is the middle tier of the architecture also known as the logic tier as the information/request gathered through the presentation tier is processed in detail here. It also interacts with the server that stores the data. It processes the client’s request, formats, it and sends it back to the client. It is developed using languages like- Python, Java, PHP, etc.
Data Tier
It is the last tier of the architecture also known as the Database Tier. It is used to store the processed information so that it can be retrieved later on when required. It consists of Database Servers like- Oracle, MySQL, DB2, etc. The communication between the Presentation Tier and Data-Tier is done using middle-tier i.e. Application Tier.
Three-Tier Client Server Architecture in Distributed System
In this article, we will get into detail about the three-tier client-server architecture. The most common type of multi-tier architecture in distributed systems is a three-tier client-server architecture. In this architecture, the entire application is organized into three computing tiers
- Presentation tier
- Application tier
- Data-tier
The major benefit of the three tiers in client-server architecture is that these tiers are developed and maintained independently and this would not impact the other tiers in case of any modification. It allows for better performance and even more scalability in architecture can be made as with the increasing demand, more servers can be added.
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