What is a web server? Does the server mean giant size computers?

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What is a web server? Does the server mean giant size computers?
Have you ever wondered about how this page was loaded into your browser? Maybe you are sitting in front of the computer, and reading this article, this page is open in front of your browser, maybe click on the link and the page came forward in front of you. But what do you know about the story behind these scenes? All these things are related to a term, named Web server. When people think about the server, they imagine it is a physical giant computer that is kept in a cool room and it looks like a supercomputer. Really is it? So what is the web server? Let's explore everything today ...

What is a web server?
Generally, the server is able to serve all pages from the Internet to your computer browser. So what is this "web server"? Actually, "server" means no giant computer, not even a single computer. so what is it? "Server" is basically a software program that works on HTTP protocols to fetch web pages when user request for these pages. It does not require a huge computing system to operate even it is possible to run a web server by a simple USB drive (PenDrive) after installing the software (eg: XAMPP server software).
Computers that are used to host websites must have the necessity of installing the server program. However, those who provide you website hosting services have many dedicated computing facilities. They have server applications such as Apache, IIS, or AnonymousX (NGINX) installed on their large computer. Or build-in server operating systems such as Windows IIS (Internet Information Server), or Ubuntu Linux, is also capable to work as a server.
Besides those professional servers, you can also use your computer as a server. If your computer is currently running on the Windows operating system, you can create a local server or localhost for your PC by launching the IIS service from the "Programs and Features" option in Control Panel. Once you've enabled IIS, you can put any HTML file into the "c: \ inetpub \ wwwroot" directory and run it on the server. Once again, you can install a small program called XAMPP on a computer and run PHP Script. Many people have run PHP Script on their PC using "WordPress", "Joomla" and so on. After launching your PC server, you can view your local hosted pages using any web browser, and you can access your server with any computer or smartphone in the same network that is connected with your PC.