Apache web server is an HTTP Daemon you can install to deliver
content over HTTP. If you're with a webhost, they do the worrying
about the web server, all you need to do is upload your stuff to
it.
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The Apache Bridge is an Apache plugin that integrates an
Application server like Oracle's Weblogic with an Apache HTTP
server and is usually used in cases in which Apache handles static
web pages and Weblogic servlets handle the dynamic content.