You might have heard the word "tier" when researching Internet applications. A tier is like a layer in a wedding cake. A cake can have multiple layers and a Web application can have multiple appears ...
I'm trying to get a mental handle on the 3 tiered DB app (DB-back end, Mid-tier, Web Server-Front end) and when it should be used in place of a smaller scale 2-tiered web app (DB-Backend, Web-Front ...