AZ-104 Certification Practice Question #239

Question

You have an Azure subscription that contains two virtual machines as shown in the following table.

You perform a reverse DNS lookup for 10.0.0.4 from VM2.
Which FQDN will be returned?

Accepted Answer

When utilizing default Azure-provided name resolution (which resolves via `168.63.129.16`), Azure automatically registers pointer (PTR) records for virtual machines using their private IP addresses. These reverse DNS lookups resolve to the fully qualified domain name format `<vmname>.internal.cloudapp.net`. Therefore, performing a reverse DNS lookup for VM1's private IP (10.0.0.4) will resolve to `vm1.internal.cloudapp.net`.

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