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Web Application : web application - Coggle Diagram
Web Application : 
DESCRIBE WEB APPLICATION
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Common web applications include email, online retail sales, online auctions, instant messaging services and more
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STATIC AND DYNAMIC
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DYNAMIC
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Offers a unique mix of dynamic content, ,multimedia elements and interactive features
PHP, JavaScript, ASP, and JSP can be used to create dynamic pages
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Web Server
Retrieves the file associated with the URL and return the contents to the client (static website did not interact with database)
Invoke scripts (SQL and server side scripting language) that communicates with database server to construct a response message
The web server will send any web page from the website it is hosting to any user's browser, per user request.
To publish a website, you need either a static or a dynamic web server.
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A static web server, or stack, consists of a computer (hardware) with an HTTP server (software). We call it "static" because the server sends its hosted files as-is to your browser.
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A dynamic web server consists of a static web server plus extra software, most commonly an application server and a database. We call it "dynamic" because the application server updates the hosted files before sending content to your browser via the HTTP server.
Web server communicating with HTTP clients
Database Server
As hardware, the database server is typically a dedicated higher-end computer that hosts the database
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As software, a database server is the back-end portion of a database application, following the traditional client-server model.
Upon requests from the client machines, it searches the database for selected records and passes them back over the network.
Database server may refer to both hardware and software used to run a database, according to the context.
Web Server software
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IIS
Runs on Windows NT/2000, 2003 , Win XP, Vista, Win 7 and upcoming windows version
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Used with ASP, .NET framework and SQL Sever
Apache HTTP
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Can be install in almost all operating systems including Linux, Unix, Windows, FreeBSD, Mac and more
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LIGHTTPD
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Fast, secure and consume less CPU power
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Run on Windows, Mac OS, Linux and Solaris
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Dynamic Web
can contain client-side scripting or server-side scripting to generate the changing content or a combination of both scripting types.
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A dynamic website contains information that changes, depending on the viewer, the time of the day, the time zone, the viewer's native language, and other factors.
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