The types of error pages available are as follows:
Error 400: Bad Request Error 401: Authorization Required (when you create password-protected directory and there is an unauthorized entry attempt) Error 403: Forbidden (when a person tries to access a forbidden page) Error 404: Wrong page (when a person tries to access a file that does not exist on the server) Error 500: Internal Server Error (like when you try to install a CGI script but the script can not be compiled due to programming error)