A static module is a module that been compiled into Apache itself, and thus cannot be removed.
The following is a list and brief description of the static modules that have been included with your server:
mod_so.c - Allows other modules to be loaded in at run time
mod_auth_mysql.c - Allows you to restrict access to areas of your Web site based on authentication information stored in a MySQL database.
mod_frontpage.c - Extensions for Microsoft FrontPage, a popular Web site creation tool.
More information about these modules can be found on the Apache Web site at the following URL: