Google Exam Professional Cloud Network Engineer Topic 5 Question 106 Discussion

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

Question #: 106
Topic #: 5

[All Professional Cloud Network Engineer Questions]

You have configured a Compute Engine virtual machine instance as a NAT gateway. You execute the following command:

gcloud compute routes create no-ip-internet-route \

--network custom-network1 \

--destination-range 0.0.0.0/0 \

--next-hop instance nat-gateway \

--next-hop instance-zone us-central1-a \

--tags no-ip --priority 800

You want existing instances to use the new NAT gateway. Which command should you execute?

Asudo sysctl -w net.ipv4.ip_forward=1

Bgcloud compute instances add-tags [existing-instance] --tags no-ip

Cgcloud builds submit --config=cloudbuild.waml --substitutions=TAG_NAME=no-ip

Dgcloud compute instances create example-instance --network custom-network1 \
--subnet subnet-us-central \
--no-address \
--zone us-central1-a \
--image-family debian-9 \
--image-project debian-cloud \
--tags no-ip

Show Suggested Answer

Suggested Answer: B

https://cloud.google.com/sdk/gcloud/reference/compute/routes/create

In order to apply a route to an existing instance we should use a tag to bind the route to it.

by Johnna at May 03, 2025, 09:28 AM

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Elli

3 days ago

Wow, this is a tricky one. I'm going to have to go with option B, though. Seems like the most logical choice to me.

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Lindsey

6 days ago

I agree with Mabelle, creating a new instance with the correct tags seems like the right approach.

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Sena

7 days ago

But adding tags to existing instances won't make them use the new NAT gateway.

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Mabelle

15 days ago

I disagree, I believe the answer is D.

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Jerilyn

15 days ago

Okay, let's see here. I'm going to go with option B. Tagging the existing instances with 'no-ip' seems like the way to go.

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Magdalene

16 days ago

Haha, this question is a piece of cake! Of course, the answer is B. Who would've thought configuring a NAT gateway could be so easy?

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Carma

2 days ago

Yeah, it's pretty straightforward. Just add the 'no-ip' tag to the existing instances and they'll use the new NAT gateway.

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Melissia

12 days ago

B) gcloud compute instances add-tags [existing-instance] --tags no-ip

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Sena

17 days ago

I think the answer is B.

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Telma

1 months ago

Hmm, I'm not sure about this one. Let me think it through again. Ah, I got it! The answer is B, adding the 'no-ip' tag to the existing instances.

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Mee

4 days ago

No, I believe the correct answer is B) gcloud compute instances add-tags [existing-instance] --tags no-ip

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Mona

11 days ago

I think the answer is A) sudo sysctl -w net.ipv4.ip_forward=1

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Ammie

2 months ago

The question seems straightforward. I think the answer is B, since we need to add the 'no-ip' tag to the existing instances to make them use the new NAT gateway.

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Wynell

3 days ago

Exactly, that way the existing instances will use the new NAT gateway.

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Rana

6 days ago

That makes sense, we just need to add the 'no-ip' tag to the existing instances.

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Amber

10 days ago

B) gcloud compute instances add-tags [existing-instance] --tags no-ip

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