sathya vani

• Jan 5th, 2006

 

2-tier architecture:

In a two-tier system, we have a client program and a server program. The main difference between the two is that the server responds to requests from many different clients, while the clients usually initiate the requests for information from a single server.

3-tier architecture:

A three-tier application we have a client,a server and a database, in which the server stores its data.  The flow of information is still essentially linear: a request comes from the client to the server; the server requests or stores data in the database; the database returns information to the server; the server returns information back to the client