PCDE Migrate data solutions Practice Question
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?
⚠ Common exam trap
Many exam-takers 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.
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.
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.
- ✗
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.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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