Exam Professional Cloud Network Engineer topic 1 question 57 discussion

Actual exam question from Google's Professional Cloud Network Engineer

Question #: 57
Topic #: 1

[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?

A. sudo sysctl -w net.ipv4.ip_forward=1
B. gcloud compute instances add-tags [existing-instance] --tags no-ip
C. gcloud builds submit --config=cloudbuild.waml --substitutions=TAG_NAME=no-ip
D. gcloud 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 🗳️

by lukedj87 at Nov. 11, 2020, 9:21 a.m.

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sindra

Highly Voted 3 years, 5 months ago

confirm B https://cloud.google.com/vpc/docs/add-remove-network-tags

upvoted 10 times

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Komal697

Highly Voted 1 year, 2 months ago

Selected Answer: B

This command adds the "no-ip" tag to the existing instances, allowing them to use the newly created NAT gateway. The routing rule you created with the gcloud compute routes create command specifies the next hop instance as the NAT gateway instance, and the tag "no-ip" is required to match the route. Option A enables IP forwarding on the NAT gateway instance, which is already required to function as a NAT gateway, but it does not help to configure the routing of the existing instances. Option C submits a Cloud Build job to build and deploy an application or infrastructure defined in a YAML file. This option is not related to configuring the routing of existing instances to use a NAT gateway. Option D creates a new instance and applies the "no-ip" tag to it, but it does not help to configure the routing of existing instances.

upvoted 5 times

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bus_karan19

Most Recent 8 months, 1 week ago

Selected Answer: B

https://cloud.google.com/vpc/docs/add-remove-network-tags

upvoted 1 times

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rr4444

11 months ago

VERY out of date Q command has changed a lot https://cloud.google.com/nat/docs/gce-example#create-nat gcloud compute routers create nat-router \ --network custom-network1 \ --region us-east4 gcloud compute routers nats create nat-config \ --router-region us-east4 \ --router nat-router \ --nat-all-subnet-ip-ranges \ --auto-allocate-nat-external-ips

upvoted 1 times

rr4444

11 months ago

actually, sorry, the Q is not Cloud NAT

upvoted 1 times

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pk349

1 year, 5 months ago

• B. gcloud compute instances *** add-tags [existing-instance] --tags no-ip gcloud compute routes create NAME --destination-range=DESTINATION_RANGE (--next-hop-address=NEXT_HOP_ADDRESS | --next-hop-gateway=NEXT_HOP_GATEWAY | --next-hop-ilb=NEXT_HOP_ILB | --next-hop-instance=NEXT_HOP_INSTANCE | --next-hop-vpn-tunnel=NEXT_HOP_VPN_TUNNEL) [--description=DESCRIPTION] [--network=NETWORK; default="default"] [--next-hop-ilb-region=NEXT_HOP_ILB_REGION] [--next-hop-instance-zone=NEXT_HOP_INSTANCE_ZONE] [--next-hop-vpn-tunnel-region=NEXT_HOP_VPN_TUNNEL_REGION] [--priority=PRIORITY; default=1000] [--tags=TAG,[TAG,…]] [GCLOUD_WIDE_FLAG …]

upvoted 1 times

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