GCP Professional Cloud Security Engineer Practice Question
Your organization runs a multi-region application on Google Cloud. Each VPC network contains subnets in us-central1, europe-west1, and asia-southeast1. Security mandates that a single set of egress rules must block known malicious IP ranges and allow outbound HTTPS to partner networks, no matter which region a VM is in. At the same time, network engineers need the flexibility to add region-specific deny rules for legacy systems being phased out only in europe-west1. You plan to use Cloud Next Generation Firewall (Cloud NGFW). Which combination of firewall policy attachments best meets the requirements while minimizing rule duplication and operational overhead?
Attach a global network firewall policy to each VPC for the common rules and a regional firewall policy only in europe-west1 for the legacy deny rules.
Attach a hierarchical firewall policy at the organization level for the common rules and another hierarchical policy at the folder level targeting europe-west1 projects.
Attach a regional firewall policy in every region for the common rules and another regional policy in europe-west1 for the legacy deny rules.
Attach a single global network firewall policy that contains both the common rules and the europe-specific legacy deny rules, using target tags to scope the deny rules to europe-west1.
A global network firewall policy attached to each VPC ensures that the base rules (block threat-intel IPs and allow outbound HTTPS) are evaluated first for every VM in every region. Because regional firewall policies are evaluated after a global network policy that belongs to the same network, attaching a regional firewall policy to the europe-west1 region lets engineers add europe-specific deny rules without affecting VMs in other regions. Using only regional policies would force you to duplicate the common rules in every region, while attaching the europe-west1 policy at the organization or folder level would incorrectly apply the legacy restrictions to all regions.
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What is Cloud Next Generation Firewall (Cloud NGFW)?
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What is the difference between global and regional firewall policies in Google Cloud?
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Why are hierarchical firewall policies unsuitable for this scenario?
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What is Cloud Next Generation Firewall (Cloud NGFW)?
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How do global and regional firewall policies differ in Google Cloud?
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Why is minimizing rule duplication important in firewall policy design?
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GCP Professional Cloud Security Engineer
Securing communications and establishing boundary protection
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