Menu
What does it mean by N-Tiered and N-Layered architecture/design?
Is there any difference between N-Tiered and N-Layered architecture/design?
If yes, what is the difference?
805
N refers to # of tiers or # of layers in ArchitectureLayers Logical layers are merely a way of organizing your code. Typical layers include Presentation, Business and Data – the same as the traditional 3-tier model. But when we're talking about layers, we're only talking about logical organization of code.
An N-tier architecture divides an application into logical layers and physical tiers. Layers are a way to separate responsibilities and manage dependencies. Each layer has a specific responsibility. A higher layer can use services in a lower layer, but not the other way around.
In 3 Tier Application there are three tiers like Presentation Layer , Application Layer and Data layer. Here the application layer contains business logic as well . On the other hand in N Tier Application layer is divided into 2 i.e. Application Layer and Business Logic layer.
People often use the two terms interchangably in that they can describe an architecture as being both multi-layered and multi-tiered. My take on it is that generally a tier refers to some physical separation while a layer is more of a logical separation.
For example, a typical web application I would say has a front end - what's displayed in the browser - and the actual application logic running on the application server, and a database. This could be referred to as 3 tiered, since there is a database server, an application server and the client machine. Just as easily, however, one may refer to the database layer, the logic layer and the presentation (or UI) layer.
100
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
