Answer: Network security groups (NSG)

Network security groups (NSG) in Azure are utilized to manage inbound and outbound traffic for network interfaces, VMs, and subnets. By setting up NSGs, you can establish rules that permit or block traffic according to source and destination IP addresses, ports, and protocols. This method enables the isolation of sensitive data in Azure Databricks by restricting network access to authorized sources only. While Azure DDoS Protection safeguards Azure resources against DDoS attacks, and Azure Firewall offers a managed network security service, neither is specifically tailored for isolating sensitive data within Azure Databricks. Similarly, Application security groups (ASG) focus on network security as an extension of an application's architecture but are not designed for data isolation in Azure Databricks. Thus, NSGs are the most appropriate choice for this purpose.

Author: LeetQuiz Editorial Team