What is a prerequisite for protecting on-premises Kubernetes clusters with Microsoft Defender for Cloud?

To protect on-premises Kubernetes clusters with Microsoft Defender for Cloud, it's essential to ensure that your Azure Arc-enabled Kubernetes clusters meet specific network requirements. Azure Arc is a bridge that enables management and security of Kubernetes clusters running outside of Azure. It allows these clusters to be monitored and secured as if they were native Azure resources.

Meeting the network requirements ensures that the clusters can effectively communicate with the necessary Microsoft Defender for Cloud services and resources. This connectivity is crucial for receiving security updates, configurations, and alerts that enable comprehensive protection and management of security policies.

The other options, while important in the broader context of container security within Azure, do not specifically address the prerequisites for securing on-premises Kubernetes clusters through Microsoft Defender for Cloud.