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PROFESSIONAL-CLOUD-NETWORK-ENGINEER · Question #92
After a network change window one of your company's applications stops working. The application uses an on-premises database server that no longer receives any traffic from the application. The…
The correct answer is B. The more specific VPC subnet route is taking priority. 10.0.0.0/8 is part of 10.1.0.0/24 10.2.0.0/24 and 10.3.0.0/24, but, VPC network route priority is VPC higher than 10.0.0.0/8. https://cloud.google.com/vpc/docs/routes#routeselection
Submitted by layla.eg· Apr 18, 2026Implementing a Google Cloud network
Question
After a network change window one of your company's applications stops working. The application uses an on-premises database server that no longer receives any traffic from the application. The database server IP address is 10.2.1.25. You examine the change request, and the only change is that 3 additional VPC subnets were created. The new VPC subnets created are 10.1.0.0/16, 10.2.0.0/16, and 10.3.1.0/24/ The on-premises router is advertising 10.0.0.0/8. What is the most likely cause of this problem?
Options
- AThe less specific VPC subnet route is taking priority.
- BThe more specific VPC subnet route is taking priority.
- CThe on-premises router is not advertising a route for the database server.
- DA cloud firewall rule that blocks traffic to the on-premises database server was created during the
How the community answered
(24 responses)- A13% (3)
- B75% (18)
- C4% (1)
- D8% (2)
Explanation
10.0.0.0/8 is part of 10.1.0.0/24 10.2.0.0/24 and 10.3.0.0/24, but, VPC network route priority is VPC higher than 10.0.0.0/8. https://cloud.google.com/vpc/docs/routes#routeselection
Topics
#VPC Routing#Longest Prefix Match#Hybrid Connectivity#Network Troubleshooting
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