Short Stay < 90 days
If you intend to stay in the Netherlands for a period that is shorter than 4 months, you will not automatically receive a Citizen Service Number (BurgerServiceNummer, or simply BSN). However, you may still need a BSN for official types of registration. Some banks require this for the opening of a bank account.
The FAQ page
on burgerservicenummer.nl, the page Long Stay > 90 days
provide more information.
If you have any questions regarding procedures upon entering the Netherlands, you can ask your Faculty contact person