Tuesday, February 7, 2012

What is 3 tire architecture ?

3-Tier architecture is client server architecture consists of three main layers which are separate from each other.
  • Presentation Layer: Contains actual display of pages like Html and .aspx etc, where data is presented to user or input is taken from user.   
  • Business Access Layer (BAL)Also called as Business logic layer, Contains business logic validations or calculations related with the data. 
  • Data Access Layer (DAL): It contains methods that helps BAL to connect to database and perform required action e.g.: insert, update, delete etc.  
check the following urls with example,
diff  between 2 and 3 tier.
i hope it will help you


  1. a nice one thanks abi

  2. It is really a great work and the way in which u r sharing the knowledge is excellent.Thanks for helping me to understand basic concepts. As a beginner in Dot Net programming your post help me a lot.Thanks for your informative article.
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