Application Development
Training Index
What is N-Tier?
N-Tier applications are useful in that they are able to readily implement Distributed Application Design and architecture concepts. These types of applications also provide strategic benefits to solutions at the enterprise level. It is true that two tier client server applications may seem deceptively simple from the outset they are easy toThree Tier Software Architectures
In this tutorial you will learn about three tire software architectures purpose history technical details three tier architecture usage considerations maturity costs and alternatives. The concept of Three Tier and multi tier architectures originated with the idea of Rational Software. Three Tier software is defined as client server architectureClient-Server Models and N-Tier Applications
One of principal objective of Client-Server methods is to provide data to an end user. However Client-Server architectural methodologies are much more complex. Client-Server describes the process wherein a client program generates contact with a separate server for a particular reason on a networked system. The client in these cases is the requesterN-Tier Application Manageability
While it is a fact that N-Tier applications tend to provide almost limitless scalability the desire to change or add new forms of functionality can present a challenge in more than one arena. Growth on a large scale can make capacity planning quite hard. When available resources have been exhausted by applications then there must be some sort of provisionN-Tier Application Partitioning
Application partitioning is a vital process as it provides one with the opportunity to clearly define an even distribution of an application’ s presentation process and key data components without which you may find yourself feeling quite lost. The components may be distributed over several different physical machines or across a vastN-Tier Architecture: Data Access Layer
In an N-Tier architecture the data access layer consists of components that aid one in the process of accessing the database. When it is used correctly the data access layer serves as an abstract level for the structures of the database. Simple changes that are made to the database and to tables and other components will not effect the rest of theN-Tier Architecture: The Business Rules Layer
The Business Rules Layer in an N-Tier architecture is that layer that contains the Business logic and or Business rules of the application. Reserving a separate layer strictly for Business logic in an N-Tier architecture is a major advantage in that any changes that need to be made to Business rules can be made here without having any effect on otherN-Tier Architecture Presentation Logic Layer
The Presentation Layer in an N-Tier structure is commonly referred to as the client” layer. It consists of parts that are used to present data to an end user. Examples of components on the Presentation Layer might include edit boxes labels text boxes grids buttons Windows or Web forms or more. The Presentation Layer can be either
