Professional Cloud Security EngineerConfiguring network securityMedium
A financial institution requires strict network segmentation for its critical applications in Google Cloud. They need to isolate development, staging, and production environments from each other, ensuring that traffic cannot flow between them without explicit authorization. Additionally, each environment must have its own set of firewall rules and network configurations. Which Google Cloud networking feature is best suited for this requirement?
- AVPC Network Peering
- BMultiple VPC Networks
- CShared VPC
- DCloud VPN
Show answer & explanationAnswer & explanation
Correct answer: B. Multiple VPC Networks
Creating separate, distinct VPC networks for each environment (development, staging, production) provides the strongest isolation, allowing independent network configurations and firewall rules without any implicit traffic flow between them.
Why the other options are wrong
- A. VPC Network Peering connects two separate VPC networks, allowing traffic to flow between them, which contradicts the 'no traffic without explicit authorization' requirement for strict isolation.
- C. Shared VPC allows multiple projects to share a common host VPC network, which is good for centralized networking but doesn't inherently provide strict isolation between different environments within the same network.
- D. Cloud VPN connects on-premises networks to Google Cloud or VPC networks to other VPC networks, but it's a connectivity solution, not a primary mechanism for internal network segmentation between distinct environments.
Multiple VPC Networks
Creating distinct Virtual Private Cloud (VPC) networks within a Google Cloud project or organization.
- Provides strong network isolation by default
- Each VPC has its own routing table and firewall rules
- No implicit connectivity between separate VPCs
Memory trick: Build strong walls between your networks.