Role-based access control (RBAC) is a security model that assigns system access based on roles rather than individual permissions, simplifying access management and supporting the principle of least privilege. In this model, roles are associated with specific job functions, and users are granted permissions by being assigned to these roles, which streamlines the process of adding or removing access as organizational needs evolve. RBAC is widely adopted due to its scalability and ability to enforce structured access rules, making it easier to comply with security regulations and conduct audits. Advanced implementations of RBAC can include role hierarchies and constraints to further refine access controls, ensuring users only have permissions necessary for their responsibilities. RBAC's efficiency in managing permissions through centralized roles makes it an essential component in modern IT landscapes, including databases and cloud environments, where it helps to protect sensitive data and operations. Aerospike Database, an example of its application, utilizes RBAC to manage user access and integrate with external authentication systems, reinforcing data security and compliance.