Apache is an open-source web server software that is very popular, secure, fast and reliable. It became the first web server to serve over 100 million websites. Apache relies on text configuration files like httpd.conf to manage settings and is run from the command line using a control script. It supports features like SSL, virtual hosts and CGI and can be installed on Linux, Unix and Windows systems.

1. APACHE An open source web server. Mostly for Unix, Linux and Solaris platforms

2. In 2009 it became the first web server software to surpass the 100 million web site milestone.

3. Apache is the most popular web server on the net.

4. It is very secure, fast, and reliable.

5. The name "Apache" derives from the word "patchy" that the Apache developers used to describe early versions of their software.

6. Implements many frequently requested features, including: DBM databases for authentication

7. Customized responses to errors and problems

8. Virtual Hosts

9. Multiple DirectoryIndex directives

10. It has been tested thoroughly by both developers and users.

11. APACHE WEB SERVER The Apache Web server provides a full range of Web server features, including CGI, SSL, and virtual domains. Apache also supports plug-in modules for extensibility.

12. The Apache Web Server has HTTP

13. IIS

14. SSL

15. The Apache Web server has been ported to Windows and other network operating systems (NOS). The Apache HTTP Server is web server software notable for playing a key role in the initial growth of the World Wide Web.

16. HTTP is an Hypertext Transfer Protocol.

17. It provides a standard for Web browsers and servers to communicate.

18. The definition of HTTP is a technical specification of a network protocol that software must implement.

19. HTTP is an application layer network protocol built on top of TCP. HTTP