" Mask operation is used to hide object either partially or completely."

• Binary masks are used for various purposes but only one reason.

  Binary masks are used to change specific bits in the original value to the desired setting(s) or to create a specific output value.

  A binary mask is used to change one or more bits from 1 to 0 or vice versa using a boolean comparison operation.

Places Binary Masks are used

• Network Masks
• Computer Graphics
• Changes to CPU Registers & Flags

References:

• https://www.inetdaemon.com/tutorials/basic_concepts/number_systems/binary/masks.shtml