- A
VPC peering
VPC peering provides private connectivity between VPCs without internet exposure.
- B
Direct peering
Why wrong: Direct peering is not a supported option for DMS source connection profiles.
- C
Cloud SQL Auth Proxy
Why wrong: Auth Proxy is used to connect to Cloud SQL, not as a source network option.
- D
IP allowlisting for public IP
Why wrong: This would expose the source to the internet, which is not desired.
Question 397 of 1,000
PCDOE Migrate Database Solutions Practice Question
This PCDOE practice question tests your understanding of migrate database solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 team is migrating a self-managed PostgreSQL database to AlloyDB using DMS. They need to set up the source connection profile. The source database is in a different VPC network, and the team wants to avoid exposing it to the internet. Which connectivity option should they use?
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
✓
VPC peering
VPC peering is the correct connectivity option because it allows private IP connectivity between two VPC networks without exposing the source database to the internet. DMS can use VPC peering to connect to a source PostgreSQL database in a different VPC, as long as the CIDR ranges do not overlap and the necessary firewall rules allow traffic on port 5432. This meets the requirement of avoiding internet exposure while enabling secure, low-latency replication.
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.
- ✓
VPC peering
Why this is correct
VPC peering provides private connectivity between VPCs without internet exposure.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Direct peering
Why it's wrong here
Direct peering is not a supported option for DMS source connection profiles.
- ✗
Cloud SQL Auth Proxy
Why it's wrong here
Auth Proxy is used to connect to Cloud SQL, not as a source network option.
- ✗
IP allowlisting for public IP
Why it's wrong here
This would expose the source to the internet, which is not desired.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse VPC peering with Direct peering, assuming both are for VPC-to-VPC connections, but Direct peering is specifically for on-premises or external networks, not for connecting two Google Cloud VPCs.
Detailed technical explanation
How to think about this question
VPC peering uses the Google Cloud internal IP infrastructure to route traffic between VPCs, leveraging the global VPC capability without requiring VPN tunnels or public IPs. DMS creates a private connectivity configuration that uses the peering connection to reach the source database, and you must ensure that the source database's firewall allows inbound traffic from the DMS subnet's CIDR range. A common real-world scenario is when the source database resides in a shared VPC or a different project, and VPC peering is the only way to maintain private connectivity without complex VPN setups.
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.
TExam Day Tips
- 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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Visual reference
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Migrate Database Solutions — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this PCDOE question test?
Migrate Database Solutions — This question tests Migrate Database Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: VPC peering — VPC peering is the correct connectivity option because it allows private IP connectivity between two VPC networks without exposing the source database to the internet. DMS can use VPC peering to connect to a source PostgreSQL database in a different VPC, as long as the CIDR ranges do not overlap and the necessary firewall rules allow traffic on port 5432. This meets the requirement of avoiding internet exposure while enabling secure, low-latency replication.
What should I do if I get this PCDOE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
This PCDOE 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 PCDOE exam.
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