Google PCA Manage implementation of cloud architecture Practice Question
A large enterprise is migrating their on-premises data center to Google Cloud. They have hundreds of VMs and need to minimize network latency between on-prem and cloud during migration. They have high bandwidth requirements. Which connectivity solution should they use?
⚠ Common exam trap
Many candidates confuse Cloud VPN with Cloud Interconnect, assuming VPN is sufficient for high-bandwidth, low-latency needs, but VPN's reliance on the public internet introduces jitter and bandwidth constraints that make it unsuitable for large-scale migrations.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Cloud Interconnect
Cloud Interconnect provides a dedicated, high-bandwidth, low-latency connection between on-premises data centers and Google Cloud, bypassing the public internet. This is ideal for large-scale migrations with hundreds of VMs where minimizing latency and ensuring consistent throughput is critical.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Cloud Interconnect
Why this is correct
Cloud Interconnect provides dedicated private connectivity at 10 Gbps or 100 Gbps per attachment, bypassing the public internet. This satisfies the high-bandwidth, low-latency requirement for migrating hundreds of VMs, unlike VPN tunnels which traverse shared internet paths.
- ✗
Cloud VPN
Why it's wrong here
Cloud VPN tunnels traffic over the public internet, so latency and throughput depend on internet conditions and cannot meet high-bandwidth, low-latency requirements for hundreds of VMs. It would be correct for low-cost, lower-bandwidth connectivity or as a backup to Dedicated Interconnect.
- ✗
Cloud NAT
Why it's wrong here
Cloud NAT provides outbound internet address translation for private instances; it cannot connect an on-premises data centre to a VPC at all. It would be the right choice for letting private GCE instances reach the internet without external IPs, not for high-bandwidth, low-latency migration traffic.
- ✗
Peering with Google
Why it's wrong here
Peering with Google connects your VPC to Google's network for Google services and third-party peering, not to your own on-premises data centre. It would suit accessing Google APIs or SaaS over Google's backbone, but provides no path to on-prem resources.
Go deeper
Related to this question
Learn chapter
Data Migration and Transfer Services
Key term
Throughput
Throughput is the rate at which data is successfully transferred from one point to another over a network, typically measured in bits per second.
Key term
Cloud Interconnect
Cloud Interconnect is a service that provides a dedicated, private, high-bandwidth connection between your on-premises network and a cloud provider's network, bypassing the public internet for improved reliability, security, and performance.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCA practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCA exam.