1) Is my division correct?Not for production environment but for learning pourpose can be good.
2) Where should I distribute the HTML Web Server on the first or on the second machine?On WLS, so on the second machine.
3) Is there any need to install the Oracle Application Server? If yes on which machine should I install it?No
4) Is there any missing component which I am forgetting to install?A development client is a nice to have.