Client and Server

Most organization today are moving to client server architectures. Client server attempt to balance the processing between the client and the server by having both do some of the logic. In these networks, the client is responsible for the presentation logic, while the server is responsible for the data access logic and data storage. The application logic may reside on the client on the client or on the server, or it may be split between both.

These are many ways in which the application logic can be partitioned between the client and the server. The type of the client server consists of two-tier, three-tier and multi-tier client server. Two-tier client server is one of the most common. In this case, the server is responsible for the data and the client is responsible for the application and presentation. The two-tier client server is uses only two sets of computers, one client and one server. For example, the database management system (DBMS) runs in the server. A request from the client is sent to the DBMS, which responds by searching the server and sending only the result to the client. If 100 records matched the criteria in our million-record example, only 100 kilobytes of data traverse network rather than one gigabyte.

Another type of client server architectures is three-tier client server uses three sets of computers. In this case, the software on the client computer is responsible for presentation logic, an application server is responsible for the application logic, and a separate database server is responsible for the data access logic and data storage.

Three-tier client server
Beside that, the web really is a client server. Because on the server side, the web uses a multi-tier architecture with interlinked web server, application servers, database servers and caching servers. On the client side, user machines commonly execute scripts embedded in countless web pages. They also execute java applets, java programs and rich client application, all of