2-Tier Architecture and 3-Tier Architecture

2-Tier Architecture-

Two tier means two layer Architecture one is view level and other is database. The relation between view level or application level  and the database directly is called one tier Architecture. For example- You go to railway station  for reservation of a ticket from reservation window you collect the form for reservation and fill the detail like source, destination, name etc. Submit that form to reservation window then the inside the reservation railway employee search detail that you filled and reserve your ticket. reservation window authorized employee reserve the ticket by using interface. Communication between Client and database is called 2-Tire Architecture.  This architecture provide limited scalability, easy to Maintained and low security.

3-Tier Architecture-

In this architecture consists of 3 layer client level, Business layer and Data layer. 3- Tier Architecture are communicate with database or Server through using the Intermediate Layer.

Multiple user can  get and store information into the database through the interface or using any application. For example- you want book a reservation on IRCTC, Booking Bus ticket on RedBus.

Scalability- High

Maintenance- High

Security- High

3-Tier Architecture