How to Connect On-Premises to GCP with Low Latency and Redundancy?
Short answer
B Order two 10Gbps Dedicated Interconnect connections in a single metropolitan area (metro). Distribute the connections across different edge availability domains. Create a Cloud Router and two 10Gbps VLAN attachments.
Question
Key Takeaways
Tests mapping explicit performance metrics to the correct connectivity product, with the common trap being the preference for cheaper or simpler alternatives like Partner Interconnect or HA VPN.
This question evaluates the selection of Google Cloud network interconnects for high-performance hybrid architectures. The community consensus confirms that Dual Dedicated Interconnects are the only solution meeting strict 10Gbps bandwidth, redundancy, and lowest-latency requirements.
Common mistake: Option A (Partner Interconnect) is frequently selected due to its lower provisioning overhead, but it introduces higher latency and reduced control because traffic traverses a third-party service provider backbone.
Expert Analysis
Why the Answer Is Correct
Deploying two Dedicated Interconnect circuits across separate edge availability domains in the same metro directly satisfies the 10Gbps bandwidth, redundancy, and 99.9% SLA requirements. Private fiber eliminates public internet congestion and routing hops, which guarantees the absolute lowest latency for sensitive workloads. Google Cloud natively supports this dual-circuit architecture to ensure hardware-level fault tolerance without compromising performance.
Why the Other Options Are Wrong
Partner Interconnect routes traffic through a third-party carrier backbone, adding unnecessary latency and reducing administrative control, which violates the strict performance criteria. HA VPN options traverse the public internet, making them susceptible to jitter, packet loss, and unpredictable latency regardless of how tunnels are terminated. Additionally, terminating both VPN tunnels on a single public IP creates a critical single point of failure, directly contradicting the mandatory redundancy requirement.
Community Comment Notes
Examinees universally agreed that Dedicated Interconnect is the only viable choice when deterministic latency and high throughput are explicitly required [Comment 1]. Multiple candidates pointed out that Partner Interconnect introduces dependency on external carriers, which compromises both speed and administrative control [Comment 2]. Several users referenced official Google documentation detailing the specific edge availability domain distribution needed to achieve the mandated 99.9% uptime target [Comment 3].
Official Reference
- https://cloud.google.com/network-connectivity/docs/interconnect/tutorials/dedicated-creating-999-availability#requirements
- https://cloud.google.com/network-connectivity/docs/interconnect/concepts/overview
- https://cloud.google.com/architecture/hybrid-network-design
These links open the official vendor documentation in a new tab.
Exam Strategy
Always map explicit performance metrics like "lowest latency" and "guaranteed throughput" directly to Dedicated Interconnect before considering VPN or Partner options. When redundancy and SLA thresholds are specified, look for architectural patterns that distribute connections across distinct physical infrastructure zones rather than relying on logical failover alone.
Community Votes
100% of anonymous learners picked answer B. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 4 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 4
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b0b25 👍 3 Answered BLowest on latency, 10gbps requirement and must be redundant
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jfwahab 👍 1 Answered BA) Partner Interconnect Partner Interconnect does not meet the lowest latency requirement, as it routes through a service provider. SLA and control are dependent on the partner — not ideal for sensitive workloads requiring high control and performance. C & D) HA VPN Options VPNs are over the public internet, not suitable for sensitive workloads needing low latency and guaranteed throughput. Even with redundancy (as in D), VPN cannot achieve 10 Gbps throughput or Dedicated Interconnect-like latency.
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Gwendal 👍 1 Answered Bhttps://cloud.google.com/network-connectivity/docs/interconnect/tutorials/dedicated-creating-999-availability#requirements
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RKS_2021 👍 1 Answered BB is correct.
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