Role-Based Access Control (RBAC) is a security mechanism that restricts system access to authorized users based on their roles within an organization. In this model, permissions are assigned to specific roles rather than individual users, simplifying the management of user rights. For example, an employee in the HR department may have different access rights compared to someone in the IT department. RBAC enhances security by ensuring that users can only access information necessary for their job functions. This minimizes the risk of unauthorized access and data breaches. Organizations often implement RBAC in systems like databases and applications to streamline user management and maintain compliance with regulations.