Apache is an open-source web server that is the most popular on the internet. It is secure, fast, and reliable. Apache supports many features including CGI, SSL, virtual domains, and plug-in modules for extensibility. Apache uses simple text configuration files and is controlled through command line scripts to start, stop, and restart the server process.

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

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

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

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

5. FEATURES Implements many frequently requested features, including:

6. 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 It provides a full range of Web server features, including CGI, SSL, and virtual domains.It 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

20. HTTP clients (such as Web browsers) and servers communicate via HTTP request and response messages.

21. The three main HTTP message types are