- A
Deploy Cloud HA VPN with two interfaces, each with its own external IP address, and configure two tunnels to the on-premises VPN appliance.
HA VPN uses two external IPs and two tunnels, providing automatic failover and high availability.
- B
Use a single Cloud Classic VPN tunnel with a static route.
Why wrong: A single tunnel is not highly available; failure of the tunnel or on-premises appliance will cause outage.
- C
Deploy two Cloud Classic VPN gateways in the same region, each with one tunnel to the on-premises VPN appliance.
Why wrong: This does not protect against zonal failure as both gateways are in the same region.
- D
Deploy Cloud HA VPN with one interface and one external IP address, and configure a single tunnel to the on-premises appliance.
Why wrong: HA VPN requires two external IP addresses per gateway for high availability; a single IP does not provide redundancy.
PCNE Implementing hybrid interconnectivity Practice Question
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 company wants to connect its on-premises data center to Google Cloud. They have a single VPN appliance on-premises and need high availability for the connection. Which architecture provides the most cost-effective high availability solution?
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
Deploy Cloud HA VPN with two interfaces, each with its own external IP address, and configure two tunnels to the on-premises VPN appliance.
Option D is correct because Cloud HA VPN uses two external IP addresses per tunnel and automatically provides high availability by using two VPN gateways in different regions. Option A is incorrect because using two Cloud VPN gateways in the same region does not protect against zonal failure. Option B is incorrect because a single Classic VPN tunnel is not highly available. Option C is incorrect because HA VPN with a single IP per tunnel is not supported; HA VPN requires at least two IPs.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deploy Cloud HA VPN with two interfaces, each with its own external IP address, and configure two tunnels to the on-premises VPN appliance.
- ✗
Use a single Cloud Classic VPN tunnel with a static route.
Why it's wrong here
A single tunnel is not highly available; failure of the tunnel or on-premises appliance will cause outage.
- ✗
Deploy two Cloud Classic VPN gateways in the same region, each with one tunnel to the on-premises VPN appliance.
Why it's wrong here
This does not protect against zonal failure as both gateways are in the same region.
- ✗
Deploy Cloud HA VPN with one interface and one external IP address, and configure a single tunnel to the on-premises appliance.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Identify which PCNE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this PCNE question test?
Implementing hybrid interconnectivity — This question tests Implementing hybrid interconnectivity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy Cloud HA VPN with two interfaces, each with its own external IP address, and configure two tunnels to the on-premises VPN appliance. — Option D is correct because Cloud HA VPN uses two external IP addresses per tunnel and automatically provides high availability by using two VPN gateways in different regions. Option A is incorrect because using two Cloud VPN gateways in the same region does not protect against zonal failure. Option B is incorrect because a single Classic VPN tunnel is not highly available. Option C is incorrect because HA VPN with a single IP per tunnel is not supported; HA VPN requires at least two IPs.
What should I do if I get this PCNE question wrong?
Identify which PCNE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 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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