World Wide Web is one of the ultimate applications of Computers. Different websites are running on different servers. Each of the servers have its own IP
address and when browsers sends the dmain of that server as the URL(Uniform Resource Locator), Domain Name Server searches for the IP address of that server from
its database and return that value, now the router in the path contacs with that server through the IP address and sends HTTP request. If it is foundon that server, result is
sent back to the client browser. A webpage containing only HTML needs only to be processed by the client browser after getting the contents from server webroot.
But a webpage with server-side scripting languages like PHP, ASP, JSP needs to have executed those server-side scripts by the web server at the host machine before presenting
the result to client browser.
Besides there are client-side scripting languages like Java Script & VB Script, all of them executes in client browser only.
World Wide Web Consortium looks after the standards used in web pages and internet.
There are different types of network servers like web server, email server, file server, printing server, DNS server, telnet etc.
World Wide Web Consortium
W3 School
PHP
