AZ-305 · Question #188
Hotspot Question You have the Azure resources shown in the following table. You need to design a solution that provides on-premises network connectivity to SQLDB1 through PE1. How should you configure
The correct answer is Configure VM1 to forward contoso.com to the public DNS zone = No; Configure VM1 to forward contoso.com to the Azure-provisioned DNS at 168.63.129.16 = Yes; In VNet1, configure a custom DNS server set to the Azure provided DNS at 168.63.129.16 = No; Forward contoso.com to VM1 = Yes; Forward contoso.com to the public DNS zone = No; Forward contoso.com to the Azure-provisioned DNS at 168.63.129.16 = No. For on-premises connectivity to a Private Endpoint, DNS resolution must route private endpoint queries through Azure's private DNS infrastructure. The correct architecture requires a DNS forwarder VM (VM1) in Azure that forwards the private zone domain (contoso.com or the private
Question
Exhibits
Answer Area
- Configure VM1 to forward contoso.com to the public DNS zoneNo
- Configure VM1 to forward contoso.com to the Azure-provisioned DNS at 168.63.129.16Yes
- In VNet1, configure a custom DNS server set to the Azure provided DNS at 168.63.129.16No
- Forward contoso.com to VM1Yes
- Forward contoso.com to the public DNS zoneNo
- Forward contoso.com to the Azure-provisioned DNS at 168.63.129.16No
Explanation
For on-premises connectivity to a Private Endpoint, DNS resolution must route private endpoint queries through Azure's private DNS infrastructure. The correct architecture requires a DNS forwarder VM (VM1) in Azure that forwards the private zone domain (contoso.com or the privatelink zone) to Azure's magic IP 168.63.129.16, which can resolve Private DNS Zone records - on-premises resolvers cannot reach 168.63.129.16 directly. On-premises DNS must then forward the relevant domain to VM1 (the conditional forwarder in Azure), completing the resolution chain: on-premises → VM1 → 168.63.129.16 → Private DNS Zone → PE1's private IP.
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