Your company has decided to build a backup replica of their on-premises user authentication PostgreSQL database on Google Cloud Platform. The database is 4 TB, and large updates are frequent. Replication requires private address space communication. Which networking approach should you use?

Google Cloud Dedicated Interconnect provides a direct, private connection between your on-premises data center and Google Cloud, offering high bandwidth and low latency. This is ideal for large databases (4 TB) with frequent updates and ensures private address space communication. Google Cloud VPN is less suitable due to lower bandwidth limits and higher latency, which can impact replication performance for a large, frequently updated database. A NAT and TLS translation gateway doesn't provide the necessary private network connectivity for direct replication. A Compute Engine instance with a VPN server is a less reliable and scalable solution compared to a managed service like Cloud VPN or Dedicated Interconnect, and it introduces additional management overhead.