Answer: A single VPN tunnel, which limits throughput, A copy command that is not suited to operate over long distances, Complicated internet connectivity between the on-premises infrastructure and GCP

Based on the community discussion and best practices for Google Cloud migrations, the correct answers are A, C, and F. Option A (single VPN tunnel) is a bottleneck because VPN tunnels have throughput limits (up to 3 Gbps per tunnel) and lack redundancy, which is insufficient for migrating large datasets like 100TB. Option C (copy command not suited for long distances) is valid as standard copy commands may not handle network latency, packet loss, or resume transfers efficiently over long distances; tools like gsutil with parallel uploads are recommended. Option F (complicated internet connectivity) can cause routing issues, firewall conflicts, or ISP congestion, reducing throughput. Option B is incorrect because Cloud Storage is suitable for migration when used correctly (e.g., with multi-part uploads). Option D is irrelevant as VM count doesn't directly affect data transfer throughput. Option E is incorrect as a separate storage layer (e.g., Cloud Storage) is standard and efficient for migrations.

Author: LeetQuiz Editorial Team