5.1.5. Configure Azure DNS for Networking

💡 First Principle: Configuring Azure DNS is fundamental to network communication, providing accurate, reliable, and secure name resolution for both public-facing and internal Azure resources, thereby enabling seamless connectivity.

Scenario: You need to manage the public DNS records for your company's website. Separately, your internal applications deployed in Azure Virtual Networks need to resolve each other by custom hostnames (e.g., api.internal.local) without relying on public DNS or managing custom DNS servers.

This task delves into the practical application of Azure DNS services in a networking context. You'll explore how to:

• Configure Azure DNS Zones and Record Sets: Manage public domain name resolution.
• Configure Private DNS Zones: Enable internal name resolution within Azure virtual networks.

Mastering these concepts is crucial for the AZ-104 exam, as it assesses your ability to implement and manage core DNS infrastructure.

⚠️ Common Pitfall: Forgetting to delegate the domain at the registrar to the Azure DNS name servers. Without this step, Azure DNS will not be authoritative for the public domain.

Key Trade-Offs:

• Public vs. Private DNS: Public DNS is for internet-facing resources. Private DNS is for secure, internal name resolution, which enhances security by not exposing internal network topology.

Reflection Question: How does Azure DNS, through its ability to manage both public and private DNS zones, fundamentally ensure reliable, scalable, and high-performance name resolution for diverse networking needs?