Google Cloud Professional Cloud Network Engineer — Question 186

You are deploying your infrastructure in the us-central1 region. Your on-premises data center is located in New York City, and the Google Cloud region closest to New York City is us-east4. Your Cloud Interconnect is located in Ashburn, Virginia (VA), United States. You need to use Cloud Interconnect to connect your application infrastructure with backend systems in your data center location. You do not expect the application bandwidth to exceed 500 Mbps. You want to minimize latency and cost. What should you do?

Answer options

• A. Create a Cloud Router and VLAN attachments in the us-east4 region attached to your physical Interconnect in Ashburn, VEnable global routing in your VPC. Set the bandwidth on the VLAN attachments to 500 Mbps.
• B. Create a Cloud Router and VLAN attachments in the us-east4 region attached to your physical Interconnect in Ashburn, VA. Enable global routing in your VPC.
• C. Create a Cloud Router in the us-central1 region and VLAN attachments in the us-east4 region attached to your physical Interconnect in Ashburn, VA. Enable global routing in your VPC.
• D. Create a Cloud Router and VLAN attachments in the us-central1 region attached to your physical Interconnect in Ashburn, VA.

Correct answer: B

Explanation

Option B is correct because it ensures that the Cloud Router and VLAN attachments are in the nearest region to the data center, minimizing latency while enabling global routing, which is essential for efficient routing. Option A unnecessarily sets the bandwidth limit to 500 Mbps, which is not required given the context. Option C places the Cloud Router in the us-central1 region, which is farther from the data center, increasing latency. Option D also places the Cloud Router in the us-central1 region without the benefits of the closer region's attachments.