* this method will return the referral path to which it maps. Otherwise
     * <code>null</code> is returned.
     * 
     * @return URL to the DFS volume
     */
    String getDfsPath ();


    /**
     * @return the transport port, if specified
     */
    int getPort ();


    /**
     * @return the original URL
     */
    URL getURL ();


    /**