Microsoft Azure Security Technologies (AZ-500)

After deploying an HDInsight cluster, what is needed to support authentication from on-premises Active Directory?

1. Enable NAT for on-premises connections.

2. Deploy the On-premises data gateway.

3. Implement a VPN gateway.

4. Create an ExpressRoute connection.

The correct answer is: Deploy the On-premises data gateway.

To support authentication from on-premises Active Directory for an HDInsight cluster, deploying the On-premises data gateway is essential because it facilitates secure communication and authentication between your on-premises infrastructure and Azure services. This gateway acts as a bridge, allowing Azure services to access on-premises data sources without needing to expose them directly to the internet. The On-premises data gateway supports different authentication mechanisms, ensuring that the HDInsight cluster can integrate with on-premises Active Directory. By using this gateway, you enable seamless data access while maintaining security compliance with your organization’s identity management policies. Other options, while they hold value in different scenarios, do not specifically address the authentication needs for an HDInsight cluster with on-premises Active Directory. A VPN gateway might create a secure connection to your Azure resources, but it does not directly manage authentication. Similarly, enabling NAT or creating an ExpressRoute connection may facilitate connectivity but does not inherently enable authentication with Active Directory. Thus, the On-premises data gateway is the most suitable solution for authenticating users against an on-premises Active Directory environment when using HDInsight.