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ABSTRACT
The World Wide Web provides a new paradigm in computer networking for human communication which had an impact on the delivery of information and continues to stand in rapid developments.
Important trends used to develop new Web Technology and services such as Ubiquity, Dynamic content, Reliance on open standards and open source. The word Web Technology represents a discontinuity in the way applications are connected. Using the Web Technology as the basis for an application brings substantial advantages to the adopter.
This paper focuses on 2 tier architecture and mainly on the 3 tier architecture which is the present web technology. This paper will also review the client-side scripting and the server-side scripting.
INTRODUCTION:
 NEED FOR TECHNOLOGY:
Web sites have quickly evolved from simple, static pages to complex Web applications performing critical operations for many businesses. These applications involve dynamic data from multiple sources; ever-changing and various features for e-commerce, personalization and many more.
At the same time, customers and internal users have understandably come to expect and demand more and more sophistication in the Web-based applications they use every day. The result? Web application solution providers — and their client companies — face several new challenges. They must meet or exceed increasing user demands and deliver information quickly while adapting to each new stage of the evolution.
Yet addressing these challenges effectively requires efficient technologies for application development.
Important trends in computing which help in shape up new web technology and services such as
Ubiquity: decreases in the size of web server hardware and software, web services embedded in numerous consumer items, wireless communications, and protocols to support mobile networking.
Dynamic content: use of Java as well as both server-side and client-side scripting languages, video/audio/text conferencing, more sophisticated services hiding behind web front-ends.
Reliance on open standards and open source: software quality and reliability are not correlated with the cost of software or its associated support services; innovation is often more rapid where source code is openly available.
To meet the above the trends in web technologies we provide some architecture along with their own advantages and disadvantages.
2 tier architecture
3 tier or Multi-tier architecture
 TERMINOLOGY:
 client computer: The computer which is at remote place connected to server via internet.
 Server: which provides services to client up on client’s request.
 UI code: code for the user interface i.e., displaying buttons and lists of data.
 Database code: code that talks to a database system to fetch or store data.
 Business logic: code that processes the fetched data according to commands from the UI.