what is 2 tier architecture

Question: Two-Tier and Three-Tier Architecture?
Hi,

I want know about 2-tier architecture and 3-tier architecture. Please explain me with some examples.

Answer

http://www.virtu-software.com/ask-doug/QandA.asp?q=48

http://bhuvans.wordpress.com/2006/08/22/two-tier-architecture/

Basically 2 tier architecture : This has 2 parts namely client (front
end) and database (back end).The window application
generally developed in this technology


3 tier architecture :
1 Client-front end (request is given through client)
2.business logic :Middle layer (protocols are used for
processing the request)
3. Database :back end (response is given to the client)
Web applications are good examples for 3 tier architecture