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PROFESSIONAL-CLOUD-NETWORK-ENGINEER · Question #252

You are setting up a Dedicated Interconnect connection from your organization's on-premises data center in Frankfurt, Germany, towards the europe-west3 region, which is also in the Frankfurt…

The correct answer is C. Set up a remote VLAN attachment to the europe-west4 region on the Dedicated Interconnect. A remote VLAN attachment lets you extend your existing Dedicated Interconnect circuit in europe-west3 into europe-west4 over Google’s private backbone. This delivers the same low- latency, high-throughput connectivity to TPUs in europe-west4 without provisioning a second…

Submitted by lukas.cz· Apr 18, 2026Designing, planning, and prototyping a Google Cloud network

Question

You are setting up a Dedicated Interconnect connection from your organization's on-premises data center in Frankfurt, Germany, towards the europe-west3 region, which is also in the Frankfurt metropolitan area. The AI team lead expressed their concern regarding connectivity to the europe-west4 region because their team wants to use Google Cloud TPUs for their workloads. You need to ensure that low latency network connectivity is established for this team's workloads. You want to minimize costs and operational overhead. What should you do?

Options

  • ASet up the Dedicated Interconnect connection towards the europe-west4 region instead of the
  • BSet up an additional Partner Interconnect connection between your data center and the europe-
  • CSet up a remote VLAN attachment to the europe-west4 region on the Dedicated Interconnect
  • DUse Cloud VPN instead of Dedicated Interconnect to send traffic over the internet.

How the community answered

(41 responses)
  • A
    15% (6)
  • B
    5% (2)
  • C
    73% (30)
  • D
    7% (3)

Explanation

A remote VLAN attachment lets you extend your existing Dedicated Interconnect circuit in europe-west3 into europe-west4 over Google’s private backbone. This delivers the same low- latency, high-throughput connectivity to TPUs in europe-west4 without provisioning a second physical circuit (minimizing both costs and operational overhead).

Topics

#Dedicated Interconnect#VLAN Attachments#Hybrid Connectivity#Inter-region Networking

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