Google Exam Professional Cloud Network Engineer Topic 1 Question 103 Discussion

Actual exam question for Google's Professional Cloud Network Engineer exam

Question #: 103
Topic #: 1

[All Professional Cloud Network Engineer Questions]

You are designing a hub-and-spoke network architecture for your company's cloud-based environment. You need to make sure that all spokes are peered with the hub. The spokes must use the hub's virtual appliance for internet access.

The virtual appliance is configured in high-availability mode with two instances using an internal load balancer with IP address 10.0.0.5. What should you do?

ACreate a default route in the hub VPC that points to IP address 10.0.0.5.
Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway.
Export the custom routes in the hub.
Import the custom routes in the spokes.

BCreate a default route in the hub VPC that points to IP address 10.0.0.5.
Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway.
Export the custom routes in the hub. Import the custom routes in the spokes.
Delete the default internet gateway route of the spokes.

CCreate two default routes in the hub VPC that point to the next hop instances of the virtual appliances.
Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway.
Export the custom routes in the hub. Import the custom routes in the spokes.

DCreate a default route in the hub VPC that points to IP address 10.0.0.5.
Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway.
Create a new route in the spoke VPC that points to IP address 10.0.0.5.

Show Suggested Answer

Suggested Answer: C, E

To troubleshoot the intermittent non-HTTP 200 responses, you should enable and review health check logs and log the backend service's responses in Cloud Logging. Reviewing the statusDetails field helps identify the cause of the error. Enabling logging on the load balancer and backend service provides visibility into the issue.

by Johanna at Mar 05, 2025, 08:11 PM

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Billy

28 days ago

Ha! Imagine if the virtual appliance was actually a toaster oven running Linux. 'Sorry boss, the internet is down because the appliance is busy making toast.'

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Lawrence

3 days ago

B) Create a default route in the hub VPC that points to IP address 10.0.0.5. Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway. Export the custom routes in the hub. Import the custom routes in the spokes. Delete the default internet gateway route of the spokes.

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Polly

8 days ago

A) Create a default route in the hub VPC that points to IP address 10.0.0.5. Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway. Export the custom routes in the hub. Import the custom routes in the spokes.

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Dottie

29 days ago

I agree with Broderick, option B is the way to go. It's a well-rounded solution that ensures the spokes use the virtual appliance for internet access.

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Mary

1 months ago

Option B looks good, but I'm a bit confused about the part where we delete the default internet gateway route in the spokes. Wouldn't that break internet connectivity for the spokes?

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Talia

19 days ago

The custom routes imported in the spokes will ensure that they are peered with the hub and use the virtual appliances for internet access.

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Kindra

26 days ago

Option B is correct. By deleting the default internet gateway route in the spokes, we ensure that traffic is directed through the hub's virtual appliances for internet access.

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Cassie

2 months ago

I'm leaning towards C because it seems to make the most sense to me.

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Broderick

2 months ago

Hmm, this seems straightforward. I think option B is the correct answer - it covers all the necessary steps like creating the default route in the hub, deleting the default internet gateway route, and importing the custom routes in the spokes.

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