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Web Server


Web Server
A Web Server can be defined as software that enables computer to deliver web pages written in html to client machine. Capabilities provided by a web server are:
1.       Security services
2.       FTP(File Transfer Protocol)
3.       Data capturing(Logs are maintained in web server)
1 Web server plays two roles static and dynamic.
1.       Static : A static web page is one that has been written once, like a word processing document, and then saved onto the web server. Static pages are created using tools like HTML, JavaScript, CSS and images. 
2.       Dynamic : A dynamic web page is created on the fly. It doesn’t actually exist on the web server until a web browser requests it. When a request is made, web server runs whatever program will create the web page. That program creates the page dynamically and returns it to the web server, which then passes it along to the web browser.
Eg: Xamp server is required for PHP
a)      First php page is retrieved
b)      Decode the page
c)       Convert output to simple html

Application Server
A web application server can be defined as software programs that provide specific business functionality required by a website. The objective is to isolate the business applications from the detail of display of pages. They can be defined as middleware software that provides ability to connect traditional cooperate system to customer as well as providing functionality to conduct e-commerce.
Application Server
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