Google Professional Cloud Network Engineer Exam - 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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Tegan

4 months ago

I can't believe we're actually considering option D, that seems risky!

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Dewitt

5 months ago

Totally agree with B, it’s the most straightforward approach.

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Reuben

5 months ago

Wait, why would we need two default routes in option C? That sounds unnecessary.

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Tammara

5 months ago

I think option A is better, it keeps things simpler.

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An

5 months ago

Option B seems solid, deleting the spoke's internet gateway route makes sense.

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Mitsue

6 months ago

I’m leaning towards option D because it mentions creating a new route in the spoke VPC, but I’m unsure if that’s necessary since the hub should manage the internet access.

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Reita

6 months ago

I feel like we practiced a similar question where we had to set up routes, but I can't recall if we needed two default routes like in option C.

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Alison

6 months ago

I think option B sounds familiar because it mentions deleting the default internet gateway route in the spokes, which seems crucial for directing traffic properly.

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Ngoc

6 months ago

I remember we discussed the importance of routing in hub-and-spoke architectures, but I'm not sure if we need to delete the internet gateway route in the hub.

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Carmelina

6 months ago

This seems straightforward enough. I just need to follow the steps outlined in the options and make sure I understand the implications of each step. I think I can work through this systematically.

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Vincenza

6 months ago

I'm a bit confused by the high-availability setup of the virtual appliance. How do I need to account for that in the routing configuration? I'll have to think through that carefully.

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Luke

6 months ago

Okay, I think I've got this. The key is creating the right default routes in the hub and spoke VPCs to direct traffic through the virtual appliance. I'll need to pay close attention to the order and priority of the routes.

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Lavelle

6 months ago

Hmm, the key here is making sure the spokes use the hub's virtual appliance for internet access. I'll need to focus on the routing configuration to achieve that.

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Edna

6 months ago

This seems like a straightforward network configuration question. I'll need to carefully read through the details and options to determine the best approach.

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Billy

11 months 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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Maryann

10 months 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

10 months 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

11 months 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

11 months 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

12 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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Ashton

10 months ago

It's important to follow the correct configuration steps to ensure smooth connectivity and proper routing within the network.

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Vashti

10 months ago

This setup helps in maintaining a secure and efficient hub-and-spoke network architecture for our cloud-based environment.

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Talia

11 months 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

11 months 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

12 months ago

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

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Broderick

12 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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