Joe has read and write access to his own home directory. Joe and Ann are collaborating on a project, and Joe
would like to give Ann write access to one particular file in this home directory. Which of the following types of
access control would this reflect?
Role-based access control
Rule-based access control
Mandatory access control
Discretionary access control
Discretionary access control (DAC) allows access to be granted or restricted by an object’s owner based on
user identity and on the discretion of the object owner.