GCP Professional Data Engineer Practice Question

Your company, a global payments provider subject to PCI-DSS, is planning a phased migration of 5 PB of on-premises Oracle data to BigQuery using Datastream for continuous change data capture. You already maintain two redundant 10-Gbps private fiber cross-connects to a Google-connected colocation facility. Compliance policy requires that replication traffic must never traverse the public Internet while sustaining predictable high throughput during the migration. Which connectivity option should you implement to satisfy these requirements?

Create high-availability Cloud VPN tunnels over the existing circuits to encrypt and route the data migration traffic.
Provision redundant 10-Gbps Dedicated Cloud Interconnect connections and attach private VLANs for the Datastream replication traffic.
Arrange a Partner Interconnect through the colocation provider to carry the replication traffic on their managed links.
Order and use Google Transfer Appliance devices to ship the 5 PB of data to Cloud Storage before loading into BigQuery.

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Answer Description

Dedicated Cloud Interconnect terminates over privately provisioned cross-connects in a Google edge point of presence, keeping all traffic on Google's private backbone rather than the public Internet. A 10-Gbps or 100-Gbps VLAN attachment can be created for Datastream or other migration tools to reach Cloud Storage or BigQuery with a 99.99 percent availability SLA when deployed in a redundant configuration, providing the guaranteed bandwidth and compliance-driven isolation the payment company needs.

High-availability Cloud VPN rides over the public Internet, which violates the no-Internet mandate and offers lower, best-effort bandwidth. Partner Interconnect relies on a service provider's network and would not use the company's existing direct fibers while also offering a lower 99.9 percent SLA. Transfer Appliance is an offline bulk-transfer solution that cannot support continuous, near-real-time CDC replication.

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