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Also question is, what is web application and how it works?

Web Applications, Defined In computer system, a web application is a client-side and server-side software application in which the client runs or request in a web browser. Common web applications include email, online retail sales, online auctions, wikis, instant messaging services and more.

Similarly, what is meant by Web application? A web application is a software application that runs on a remote server. In most cases, Web browsers are used to access Web applications, over a network, such as the Internet. Some web applications are used in intranets, in companies and schools, for example.

Moreover, how does a Web application work internally?

The web application requires a web server to manage requests from the client, an application server to perform the tasks requested, and, sometimes, a database to store the information. User triggers a request to the web server over the Internet, either through a web browser or the application's user interface.

How does a Web request work?

The web browser connects to the web server and sends an HTTP request (via the protocol stack) for the desired web page. The web server receives the request and checks for the desired page. If the page exists, the web server sends it. If the server cannot find the requested page, it will send an HTTP 404 error message.