Google Cloud Professional Cloud Network Engineer — Question 94

You successfully provisioned a single Dedicated Interconnect. The physical connection is at a colocation facility closest to us-west2. Seventy-five percent of your workloads are in us-east4, and the remaining twenty-five percent of your workloads are in us-central1. All workloads have the same network traffic profile. You need to minimize data transfer costs when deploying VLAN attachments. What should you do?

Answer options

• A. Keep the existing Dedicated interconnect. Deploy a VLAN attachment to a Cloud Router in us-west2, and use VPC global routing to access workloads in us-east4 and us-central1.
• B. Keep the existing Dedicated Interconnect. Deploy a VLAN attachment to a Cloud Router in us-east4, and deploy another VLAN attachment to a Cloud Router in us-central1.
• C. Order a new Dedicated Interconnect for a colocation facility closest to us-east4, and use VPC global routing to access workloads in us-central1.
• D. Order a new Dedicated Interconnect for a colocation facility closest to us-central1, and use VPC global routing to access workloads in us-east4.

Correct answer: B

Explanation

The correct answer is B, as deploying VLAN attachments in us-east4 and us-central1 directly reduces data transfer costs since the majority of the workloads are in us-east4. Option A incurs higher costs due to the reliance on VPC global routing for accessing the other regions. Options C and D are inefficient because they involve ordering new Dedicated Interconnects further away from the majority of the workloads, leading to increased costs and latency.