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GCP Professional Cloud Security Engineer Practice Question

Your company is building a PCI-DSS cardholder data environment (CDE) on Google Cloud. The CDE lives in a dedicated folder under the organization and spans multiple projects that share a host VPC. A control states: "Outbound traffic from any CDE subnet must be restricted to a short allow-list of compliance-scanner IPs. No other egress is permitted, and project admins must not bypass or remove the control." Which design meets this requirement while minimizing operational overhead?

  • Disable Private Google Access and Cloud NAT on the Shared VPC and expose the scanner IPs through external HTTP(S) load balancing so instances cannot send traffic elsewhere.

  • Create subnet-level egress deny rules in each CDE project with priority 1000 that block all destinations except the scanner IP range; instruct network admins in every project to keep the rules in place.

  • Configure a VPC Service Controls perimeter around the CDE projects and add the scanner IP range to the perimeter's access level; no additional firewall rules are required.

  • Attach a hierarchical firewall policy to the CDE folder that first allows egress to the scanner IPs, followed by a lower-priority rule that denies all other egress; ensure project owners lack firewall-policy admin rights.

GCP Professional Cloud Security Engineer
Supporting compliance requirements
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