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Apache Web Server (Apache HTTP Server)

       Apache is the most widely used web server software. Developed and maintained by Apache Software Foundation, Apache is an open source software available for free, it runs on 43% of all webservers in the world. Apache is fast, reliable and secure. It can be highly customized to meet the needs of many different environments by using extensions and modules.

 1.  Advantages of Apache Web Server

Apache Web Server has many advantages, we will focus on the top advantages such as

-   Price
Apache Web Server is a free open source software , which means it is available for anyone to download and user at no cost.

-   Features
Apache is a powerful Web server program with features that compare to its high-priced competitors. The software includes an administration control panel, customizable error messages and authentication schemes. The virtual hosting module allows you to run multiple websites from the same server.

-   Compatibility
Apache is compatible with numerous hardware configurations and operating systems. It runs on Linux, Windows NT, MacOS, Unix and many other systems. Each installation can be tweaked to suit the technical capabilities of your hardware. Apache includes support for programming languages such as PHP, Perl and Python, among many others, along with SSL and TSL encryption for websites

that require elevated security.

Note: I don't recommend to use apache web server on production under Windows, MacOS. You still can use Apache under Windows, MacOS for development and test purposes.

-   Community Support
Technical support resources for Apache are available on multiple websites around the world. This allows server owners to access reference articles and live help whenever necessary. This gives Apache a major advantage over programs that only have a company website as a source of support. When a new bug is found, the open source user community typically creates a patch to fix it and posts the solution for free on forums and social media websites.
2.  How Apache HTTP Works?

Apache's main role is all about communication over networks, and it uses the TCP/IP protocol, The Apache server is set up to run through configuration files, in which directives are added to control its behavior. In its idle state, Apache listens to the IP addresses identified in its config file. Whenever it receives a request, it analyzes the headers, applies the rules specified for it in the Config file, and takes action.


One server can host many websites, not just one - though, to the outside world,
they seem separate from one another. To achieve this, every one of those

websites has to be assigned a different name, even if those all map eventually to
the same machine. This is accomplished by using what is known as virtual host

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