- A
Configure the HA VPN gateway with two interfaces and use BGP to load balance traffic
Why wrong: Using two interfaces requires two public IPs on-premises, which is not supported.
- B
Use a Cloud Router with custom route advertisements to the on-premises network
Why wrong: Cloud Router is used for dynamic routing but does not address the single IP limitation of the on-premises gateway.
- C
Create a Classic VPN tunnel instead of HA VPN
Why wrong: Classic VPN is supported but is not recommended and lacks the high availability of HA VPN; the question asks for a configuration step for HA VPN.
- D
Configure the HA VPN gateway with only one interface and disable the second interface
HA VPN supports using a single interface when the peer supports only one IP address. You can create one tunnel for each interface but only enable the one that matches the peer.
Google ACE Planning and Configuring a Cloud Solution Practice Question
This ACE practice question tests your understanding of planning and configuring a cloud solution. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 has a VPC in auto mode and wants to create a VPN connection to an on-premises network using HA VPN. The on-premises VPN gateway supports only a single public IP address. Which configuration step is required to establish a functional HA VPN tunnel?
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
Configure the HA VPN gateway with only one interface and disable the second interface
HA VPN normally requires two interfaces (two public IPs) for redundancy. If the on-premises gateway supports only one IP, you can configure the Cloud VPN tunnel to use a single interface (interface 0) and disable the second interface. Alternatively, you can create a Classic VPN tunnel, but Classic VPN is not recommended. The correct approach is to use HA VPN with only one interface enabled.
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.
- ✗
Configure the HA VPN gateway with two interfaces and use BGP to load balance traffic
Why it's wrong here
Using two interfaces requires two public IPs on-premises, which is not supported.
- ✗
Use a Cloud Router with custom route advertisements to the on-premises network
Why it's wrong here
Cloud Router is used for dynamic routing but does not address the single IP limitation of the on-premises gateway.
- ✗
Create a Classic VPN tunnel instead of HA VPN
Why it's wrong here
Classic VPN is supported but is not recommended and lacks the high availability of HA VPN; the question asks for a configuration step for HA VPN.
- ✓
Configure the HA VPN gateway with only one interface and disable the second interface
Why this is correct
HA VPN supports using a single interface when the peer supports only one IP address. You can create one tunnel for each interface but only enable the one that matches the peer.
Related concept
Read the scenario before looking for a memorised answer.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Quick reference
IPv4 Address Class Summary
| Class | First Octet Range | Default Mask | Networks | Hosts per Network |
|---|---|---|---|---|
| A | 1–126 | /8 (255.0.0.0) | 126 | 16,777,214 |
| B | 128–191 | /16 (255.255.0.0) | 16,384 | 65,534 |
| C | 192–223 | /24 (255.255.255.0) | 2,097,152 | 254 |
| D | 224–239 | N/A | Multicast groups | — |
| E | 240–255 | N/A | Reserved / experimental | — |
127.x.x.x is reserved for loopback. Modern networks use CIDR (classless) rather than classful addressing.
What to study next
Got this wrong? Here's your next step.
Identify which ACE 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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Planning and Configuring a Cloud Solution — study guide chapter
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FAQ
Questions learners often ask
What does this ACE question test?
Planning and Configuring a Cloud Solution — This question tests Planning and Configuring a Cloud Solution — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure the HA VPN gateway with only one interface and disable the second interface — HA VPN normally requires two interfaces (two public IPs) for redundancy. If the on-premises gateway supports only one IP, you can configure the Cloud VPN tunnel to use a single interface (interface 0) and disable the second interface. Alternatively, you can create a Classic VPN tunnel, but Classic VPN is not recommended. The correct approach is to use HA VPN with only one interface enabled.
What should I do if I get this ACE question wrong?
Identify which ACE 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
This ACE 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 ACE exam.
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