Queso blanco is simply 'white cheese'. In Cuba we used to also call it farmer's cheese or 'queso de campo'.
Queso Fresco (Fresh Cheese) and Queso Blanco are slightly different in texture although even in Mexico or South America the two names are sometimes used interchangeably. They are similar in taste and style but made differently.
Queso Fresco is made with rennet and will melt when heated.
Queso Blanco can be made with lemon juice or vinegar and will soften but not melt when heated but can be sliced and fried.
Serve with crackers.