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Exam Professional Cloud Network Engineer topic 1 question 136 discussion

Actual exam question from Google's Professional Cloud Network Engineer
Question #: 136
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?

  • A. 1. Create a default route in the hub VPC that points to IP address 10.0.0.5.
    2. 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.
    3. Export the custom routes in the hub.
    4. Import the custom routes in the spokes.
  • B. 1. Create a default route in the hub VPC that points to IP address 10.0.0.5.
    2. 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.
    3. Export the custom routes in the hub. Import the custom routes in the spokes.
    4. Delete the default internet gateway route of the spokes.
  • C. 1. Create two default routes in the hub VPC that point to the next hop instances of the virtual appliances.
    2. 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.
    3. Export the custom routes in the hub. Import the custom routes in the spokes.
  • D. 1. Create a default route in the hub VPC that points to IP address 10.0.0.5.
    2. 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.
    3. Create a new route in the spoke VPC that points to IP address 10.0.0.5.
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
by ccieman2016 at Dec. 4, 2022, 11:58 a.m.

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ccieman2016
Highly Voted 2 years ago
Selected Answer: B
I think is B, export and import when configured peering btw hub-spoke, and delete default route in spoke.
upvoted 6 times
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saraali
Most Recent 4 months ago
Selected Answer: B
Option B is the correct answer because it correctly sets up routing between the hub and spokes and ensures all spoke traffic to the internet passes through the virtual appliance in the hub. Deleting the default route in the spokes is necessary to ensure they don’t bypass the hub and connect to the internet directly.
upvoted 1 times
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waelghaith
5 months, 2 weeks ago
Selected Answer: B
No issues when you deleting default internet route on spokes VPCs.
upvoted 1 times
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ian_gcpca
5 months, 2 weeks ago
Selected Answer: A
Deleting the default internet gateway route in the spokes would have communication issues with the hub. Also we need to export custom routes from the hub and then import them into the spokes to propagate the routing configuration
upvoted 1 times
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desertlotus1211
9 months, 3 weeks ago
The Answer is a A: I'm suspect on deleting default internet route on spokes. Can cause issues.
upvoted 1 times
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pk349
1 year, 11 months ago
B. 1. Create a default route in the hub VPC that points to IP address 10.0.0.5. 2. 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. 3. Export the custom routes in the hub. Import the custom routes in the spokes. 4. Delete the default internet gateway route of the spokes. Example architecture using VPC Network Peering and internal TCP/UDP load balancer as next hop This architecture is a typical use case for enterprise environments, using the internal TCP/UDP load balancer for high availability, combined with VPC Network Peering for attaching network segments. The default route to the internet gateway in the spoke ***** VPC networks is deleted.
upvoted 2 times
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AzureDP900
2 years ago
B. 1. Create a default route in the hub VPC that points to IP address 10.0.0.5. 2. 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. 3. Export the custom routes in the hub. Import the custom routes in the spokes. 4. Delete the default internet gateway route of the spokes.
upvoted 1 times
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pfilourenco
2 years ago
Selected Answer: B
B, export and import when configured peering btw hub-spoke, and delete default route in spoke.
upvoted 1 times
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al_zo
2 years ago
Selected Answer: A
I would go for A. (default route has to be removed from the spoke) https://cloud.google.com/architecture/architecture-centralized-network-appliances-on-google-cloud#example_architectures
upvoted 1 times
al_zo
2 years ago
I meant answer B.
upvoted 2 times
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pfilourenco
2 years ago
Selected Answer: A
Since we have BGP, A is the correct: https://cloud.google.com/network-connectivity/docs/router/how-to/viewing-logs-metrics#common-searches
upvoted 1 times
pfilourenco
2 years ago
B, export and import when configured peering btw hub-spoke, and delete default route in spoke.
upvoted 3 times
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pfilourenco
2 years ago
This comment is not for this question...
upvoted 1 times
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