Multi-tier Web Application using ASP.NET

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A Multi-tier Web Application includes 4 layers:

  • Web Layer (Presentation Layer)
  • Business Rules Layer
  • Data Access Layer

From the post in [1], the author based on the Microsoft Architecture exams and has a conclusion that Multi-Tiers are either physical or logical, physical being “machines”, such as client – server and logical being the layers Presentation, Business Logic and Data Access.

Internet explorer and IIS count as tiers anyway, so yes you are multi tier.

[1] Multi-tier Web Application using ASP.NET, Microsoft ASP.NET,, retrieved in 13/08/2010
[2] Deploy Patterns, Microsoft MSDN,, retrieved in 13/08/2010
[3] Building a 3-Tier Application using ASP.NET, C# Corner,, retrieved in 13/08/2010 
[4] Building a Multi-Tier Web Application in the .NET 3.5 Framework Using LINQ to SQL, The Code Project,, retrieved in 13/08/2010 
[5] Three-Tier Architecture, Linux Journal,,2, accessed in 13/08/2010
[6] Multi-tier web application in ASP.NET, Microsoft ASP.NET,, accessed in 13/08/2010
[7] 3-tier Architecture with ASP.NET 2.0, Microsoft MSDN Library,, accessed in 14/08/2010

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