Layered and n-tier architecture

Layered architecture is a logical division of functional units. This is mainly used in enterprise applications to solve complex business scenarios.
Whereas tiered architecture is more of physical division of functional units.
To have a closer look following diagram will elaborate this.
Here a single layer can have multiple logical units like presentation layer, database layer etc. In tiered architecture these units represents physical entities like presentation server , database servers. These entities may or may not be a different computers, but in most enterprise applications for the scalability and maintenance these units are distributed.

Here is a sample layered application for reference.

1 comment:

  1. This is awesome!! really helpful for me. Thanks for sharing with us. Following links also helped me to complete my task.



.net .Net Instrumentation logging .net localization Agile amazon amazon elasticache amazon services AppDomain Application Domain architecture asp ASP.Net authentication authentication mechanisms Byte order mark c# cache cdata certifications class classic mode cloud cloud computing cluster code-behind Combobox compilation Configuration providers configurations connection connectionString constructors control controls contructor CSV CTS .net types conversion database DataGridView DataSource DataTable DataType DBML delegates design pattern dispose double encoding Entity framework Events exception handling expiry fault contracts fault exceptions function pointers functions generics help HostingEnvironmentException IIS inner join instance management integrated mode javascript join left outer join LINQ LINQ join LINQ to SQL memory leak methods microsoft modes in IIS MSIL multiple catch blocks no primary key Nullable Osmos Osmotic Osmotic communication Osmotic communications page events page life cycle partial class PMI preserve precision points private contructor ProcessExit Project management properties property protect connectionString providerName providers query regular expression repository Responsive Web Design return type run-time RWD Saas self join session session expiry sessions singelton singleton pattern software as a service source control system SQLMetal string toolstrip ToolStrip controls ToolStripControlHost tortoise SVN ToString() try catch finally update wcf web application web design web site web.config where-clause xml