What is the difference between MVC and 3 tier architecture in asp.net?

Hi,

3-tier means communication between layers is bi-directional
In MVC, communication is Uni-Directional

N-tier architecture usually has each layer separated by the network.
MVC is a design pattern where different portions of code are responsible for representing the Model, View, and controller in some application.

A fundamental rule in a three-tier architecture is the client tier never communicates directly with the data tier; in a three-tier model all communication must pass through the middleware tier.
the MVC architecture is triangular: the View sends updates to the Controller, the Controller updates the Model, and the View gets updated directly from the Model.

Hope this help.

Refer this:

http://stackoverflow.com/questions/698220/mvc-vs-n-tier-architecture

http://asp.net.bigresource.com/finding-difference-between-2-tier-and-3-tier--tejeEJAKe.html

MVC always gets a thums up it gives you better control on the html generated and from performance perspective it is still more good. You can club it with Jquery and make it still more effective like make the page work without postbacks completely dumping the Ajax framework.

You can make your current project too into MVC by adding the MVC dll ref and doing some tweaks in the config file. Currently MVC 3.0 is the latest. MVC 2.0 is available with VS2010.

Regards,
Praneeth