Exam Professional Cloud Network Engineer topic 1 question 194 discussion

Actual exam question from Google's Professional Cloud Network Engineer

Question #: 194
Topic #: 1

[All Professional Cloud Network Engineer Questions]

Your company's current network architecture has two VPCs that are connected by a dual-NIC instance that acts as a bump-in-the-wire firewall between the two VPCs. Flows between pairs of subnets across the two VPCs are working correctly. Suddenly, you receive an alert that none of the flows between the two VPCs are working anymore. You need to troubleshoot the problem. What should you do? (Choose two.)

A. Verify that a VPC Service Controls perimeter has not been enabled for the project that contains the two VPCs and the dual-NIC instance.
B. Use Cloud Logging to verify that there were no modifications to the VPC firewall rules or policies that were applied to the two network interfaces of the dual-NIC instance.
C. Verify that a public IP address has not been assigned to any network interface of the dual-NIC instance.
D. Verify that the dual-NIC instance has the --can-Ip-Forward attribute enabled.
E. Verify that the dual-NIC instance has not been added to a backend service.

Show Suggested Answer

Suggested Answer: BD 🗳️

by b0b25 at Feb. 22, 2025, 2:46 a.m.

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n2183712847

1 month, 2 weeks ago

Selected Answer: BD

In summary, the most likely and critical checks for a dual-NIC firewall instance that suddenly stops forwarding traffic are its IP forwarding capability and the applied firewall rules.

upvoted 1 times

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1f01b87

3 months ago

Selected Answer: BD

BD is correct

upvoted 3 times

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