If you need a full-length essay on USB identifiers, driver matching, or FTDI’s vendor ecosystem, I can write that for you—just let me know the specific angle.
This string— usb\vid_0403&pid_d6da&rev_0600 —is a used by Windows operating systems to uniquely recognize a specific device model and its revision. usb\vid_0403&pid_d6da&rev_0600