The Apache HTTP Server, also known as httpd, has been the most popular web server on the Internet since April of 1996. It is both free and robust and that's the reason that almost half of the world's websites runs on Apache HTTP web server, ranging from small hobby websites to huge e-commerce giants and big banks. There are also many companies which use Apache and Tomcat to host Java web application. In a typical setup, Apache web server receives the HTTP request and depending upon the URL it either route to Tomcat or serve the static files directly from the file system.