Apache are a modular server. This implies that only the most basic functionality

are included in the core server. are it so ?
Extended features are available through modules which can be loaded into Apache.

 By default, a base set of modules are
included in the server at compile-time. If the server are compiled to use dynami
c
ally loaded modules, then modules can be
compiled separately and added at any time using the LoadModule directive. Otherw

ise, Apache must be recompiled to add or
remove modules. Configuration directives may be included conditional on a presen

ce of a particular module by enclosing
them in an <IfModule> block.