Hard1 markMultiple Choice
GCP PCA · Question 24 · Network topologies
You are designing a hybrid DNS architecture. On-premises servers need to resolve internal GCP hostnames (e.g., my-db.us-central1.c.my-project.internal), and GCP VMs need to resolve on-premises hostnames (e.g., app.corp.local). How should you configure Cloud DNS?
You are designing a hybrid DNS architecture. On-premises servers need to resolve internal GCP hostnames (e.g., my-db.us-central1.c.my-project.internal), and GCP VMs need to resolve on-premises hostnames (e.g., app.corp.local). How should you configure Cloud DNS?
Answer options:
A.
Create an inbound server policy in Cloud DNS, and create a private forwarding zone pointing to the on-premises DNS servers.
B.
Create a public DNS zone for both environments and use internet routing.
C.
Configure the GCP VMs to use the on-premises DNS servers directly via DHCP.
D.
Create an outbound server policy in Cloud DNS and configure VPC Peering.
How to approach this question
Understand the two-way nature of hybrid DNS: inbound policies for on-prem->GCP, and forwarding zones for GCP->on-prem.
Full Answer
A.Create an inbound server policy in Cloud DNS, and create a private forwarding zone pointing to the on-premises DNS servers.✓ Correct
Create an inbound server policy in Cloud DNS, and create a private forwarding zone pointing to the on-premises DNS servers.
Hybrid DNS requires two components. 1) Inbound server policy: Creates an IP in your VPC that on-prem DNS servers can query to resolve GCP names. 2) Forwarding zone: Tells Cloud DNS that any query for `corp.local` from a GCP VM should be forwarded over the Interconnect/VPN to the on-prem DNS servers.
Common mistakes
Only configuring one side of the connection, or trying to override the default GCP metadata DNS server on the VMs.
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