three-tier

Question posted by: ArthiBakthavatsalam (Newbie) on May 20th, 2008 09:50 AM

I don't understand clearly what is meant by three-tier architecture. Front end is programming language, backend is database and the middle one is business unit i suppose.what is that middle layer the so called business unit

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Nitin646

Member

59 Posts

May 20th, 2008
10:04 AM
#2

Re: three-tier

Search GOOGLE!!

have you searched on google yet??

Nitin646

Member

59 Posts

May 20th, 2008
10:08 AM
#3

Re: three-tier

Just take a look at this

Ken Sharpe

Newbie

3 Posts

July 1st, 2008
07:56 PM
#4

Re: three-tier

Generally speaking, 3 tier apps have a display layer, business logic layer (called, creatively, a BLL), and a Data access layer (also imaginative, the DAL). I believe this architecture is basically worthless on real projects, but for the record, the display layer asks for information to display from the BLL. The BLL decides what information to access, and asks the DAL for it. the DAL decides how to get that actual information, and returns it to the BLL in the format the BLL asked for. The BLL then does some acrobatics to format the data for viewing, then the display layer displays it.

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