What is the difference between discretionary access control (DAC) and role-based access control (RBAC)?

DAC requires explicit authorization for a given user on a given object, and RBAC requires specific conditions.

RBAC access is granted when a user meets specific conditions, and in DAC, permissions are applied on user and group levels.

RBAC is an extended version of DAC where you can add an extra level of authorization based on time.

DAC administrators pass privileges to users and groups, and in RBAC, permissions are applied to specific groups