This PCNE practice question tests your understanding of implementing hybrid interconnectivity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A small company is moving their on-premises application to Google Cloud. They have a single on-premises office with a small router that supports IPsec VPN. They need a simple and low-cost connectivity solution that provides encryption and a consistent experience. They anticipate low bandwidth needs (under 100 Mbps). They also want the ability to use BGP for dynamic routing to avoid manual route updates. Which Google Cloud service should they use?
Partner Interconnect
Why wrong: Too expensive and complex for low bandwidth needs.
Cloud HA VPN with dynamic routing (BGP)
HA VPN supports dynamic routing, provides encryption, and is cost-effective for low bandwidth.
Cloud Classic VPN with static routes
Why wrong: Classic VPN does not support dynamic routing; they want BGP.
Direct Peering
Why wrong: Does not provide encryption and is not designed for VPC connectivity.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Cloud HA VPN with dynamic routing (BGP)
Cloud HA VPN with dynamic routing (BGP) is the correct choice because it provides an encrypted IPsec tunnel, supports BGP for automatic route exchange, and is a low-cost, simple solution for sub-100 Mbps bandwidth needs. It meets the requirement for a consistent experience without the complexity or cost of dedicated interconnect services.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Partner Interconnect
Why it's wrong here
Too expensive and complex for low bandwidth needs.
Cloud HA VPN with dynamic routing (BGP)
Why this is correct
HA VPN supports dynamic routing, provides encryption, and is cost-effective for low bandwidth.
Related concept
Read the scenario before looking for a memorised answer.
Cloud Classic VPN with static routes
Direct Peering
Why it's wrong here
Does not provide encryption and is not designed for VPC connectivity.
Common exam traps
The trap here is that candidates often confuse Cloud Classic VPN with static routes as sufficient for dynamic routing, but Cisco tests the distinction that static routes require manual updates while BGP provides automatic route exchange, making Cloud HA VPN the only correct option for dynamic routing with encryption at low cost.
Detailed technical explanation
Cloud HA VPN uses two external IP addresses and two tunnels per cloud region to provide a 99.99% SLA, supporting BGP via Border Gateway Protocol (RFC 4271) for dynamic route advertisement and failover. Under the hood, it leverages IKEv2 for key exchange and can handle up to 3 Gbps per tunnel, but for sub-100 Mbps it remains cost-effective as it charges per tunnel-hour with no minimum commitment. In a real-world scenario, a small office with a single router can establish a single HA VPN tunnel (using one of the two available interfaces) and still benefit from BGP to automatically learn routes from Google Cloud's VPC.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
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FAQ
Implementing hybrid interconnectivity — This question tests Implementing hybrid interconnectivity — Read the scenario before looking for a memorised answer..
The correct answer is: Cloud HA VPN with dynamic routing (BGP) — Cloud HA VPN with dynamic routing (BGP) is the correct choice because it provides an encrypted IPsec tunnel, supports BGP for automatic route exchange, and is a low-cost, simple solution for sub-100 Mbps bandwidth needs. It meets the requirement for a consistent experience without the complexity or cost of dedicated interconnect services.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This PCNE 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 PCNE exam.
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