What is the optional security model in Azure Kubernetes that allows Azure AD users and groups to be leveraged for role-based access control?

The correct answer focuses on Role-based Access Control (RBAC) in Azure Kubernetes Service (AKS). RBAC is an essential security model that helps manage access to resources based on the specific roles assigned to users or groups. In this context, it allows for the integration of Azure Active Directory (Azure AD) users and groups for finely controlled access permissions.

By leveraging Azure AD within the RBAC framework, organizations can utilize existing identities and manage access permissions in a more streamlined and secure way. This allows administrators to define roles that have specific permissions over Azure Kubernetes resources, thereby ensuring that users only have access necessary for their tasks. This integration effectively simplifies user management and strengthens security by allowing organizations to manage permissions consistently across their Azure resources.

Network security groups, service fabric, and Azure policies serve different functions within Azure's broader security and resource management ecosystem but do not provide the direct role-based access capabilities tied to Azure AD like RBAC does. Network security groups are primarily used for controlling inbound and outbound traffic to Azure resources. Service Fabric is a platform for running microservices and distributed applications, while Azure policies are used for governance and compliance management. These components are essential for a comprehensive security posture in Azure but do not fulfill the specific need for leveraging Azure AD users