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PROFESSIONAL-CLOUD-NETWORK-ENGINEER · Question #259

Your company uses Network Connectivity Center to connect its VPCs in Google Cloud. They plan to connect their on-premises data center to one of these VPCs by using HA VPN. The CIDR range of your on-pr

The correct answer is D. Configure a subnet of purpose PRIVATE_NAT and use Hybrid NAT.. When your on-prem network CIDR overlaps with your Google Cloud CIDR, you need to translate one side’s addresses so that routes don’t clash. Network Connectivity Center’s Private NAT lets you perform destination NAT on traffic between your spoke VPCs and the on-prem network. By co

Submitted by suresh_in· Apr 18, 2026Configuring network services

Question

Your company uses Network Connectivity Center to connect its VPCs in Google Cloud. They plan to connect their on-premises data center to one of these VPCs by using HA VPN. The CIDR range of your on-premises network overlaps with the IP addresses in Google Cloud. You want your VMs in Google Cloud to connect directly to the IP address of the on-premises hosts. What should you do?

Options

  • AConfigure a subnet of purpose REGIONAL_MANAGED_PROXY and use a Google Cloud
  • BConfigure a subnet of purpose REGIONAL_MANAGED_PROXY and use a Google Cloud TCP
  • CConfigure a subnet of purpose PRIVATE_NAT and use Private NAT for the Network Connectivity
  • DConfigure a subnet of purpose PRIVATE_NAT and use Hybrid NAT.

How the community answered

(46 responses)
  • A
    4% (2)
  • B
    13% (6)
  • C
    7% (3)
  • D
    76% (35)

Explanation

When your on-prem network CIDR overlaps with your Google Cloud CIDR, you need to translate one side’s addresses so that routes don’t clash. Network Connectivity Center’s Private NAT lets you perform destination NAT on traffic between your spoke VPCs and the on-prem network. By configuring a PRIVATE_NAT subnet in your NCC hub and applying a Private NAT policy to your spoke, you can rewrite the on-prem host IPs into a non-overlapping range, allowing your GCE VMs to connect directly to the (translated) on-prem IPs over HA VPN.

Topics

#Hybrid Cloud Networking#Network Address Translation (NAT)#Overlapping IP Ranges#Private NAT

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