Google Professional Cloud Network Engineer Exam - Topic 8 Question 88 Discussion

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

Question #: 88
Topic #: 8

[All Professional Cloud Network Engineer Questions]

You are designing a Partner Interconnect hybrid cloud connectivity solution with geo-redundancy across two metropolitan areas. You want to follow Google-recommended practices to set up the following region/metro pairs:

(region 1/metro 1)

(region 2/metro 2)

What should you do?

ACreate a Cloud Router in region 1 with two VLAN attachments connected to metro1-zone1-x.
Create a Cloud Router in region 2 with two VLAN attachments connected to metro1-zone2-x.

BCreate a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone1-x.
Create a Cloud Router in region 2 with two VLAN attachments connected to metro2-zone2-x.

CCreate a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone2-x.
Create a Cloud Router in region 2 with one VLAN attachment connected to metro2-zone2-x.

DCreate a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone1-x and one VLAN attachment connected to metro1-zone2-x.
Create a Cloud Router in region 2 with one VLAN attachment connected to metro2-zone1-x and one VLAN attachment to metro2-zone2-x.

Show Suggested Answer

Suggested Answer: D

The correct answer is D because it meets the following requirements:

It matches the hub-and-spoke model of the on-premises network, where each spoke is a separate VPC network that is connected to a central hub VPC network.

It minimizes management overhead and cost, because VPC Network Peering is a simple and low-cost way to connect VPC networks without using any external IP addresses or VPN gateways1.

It uses default networking quotas and limits, because VPC Network Peering does not consume any quota or limit for VPN tunnels, external IP addresses, or forwarding rules2.

It prevents connectivity between the spokes, because VPC Network Peering is non-transitive by default, meaning that a spoke can only communicate with the hub, not with other spokes1.To enforce this restriction, a third-party network appliance can be used as a default gateway in each spoke VPC network, which can filter out any traffic destined for other spokes3.

Option A is incorrect because it does not minimize cost, as Cloud VPN charges for egress traffic and requires external IP addresses for the VPN gateways4.Option B is incorrect because it does not prevent connectivity between the spokes, as VPC Network Peering allows direct communication between peered VPC networks by default1. Option C is incorrect because it does not minimize cost or use default quotas and limits, for the same reasons as option A.

VPC Network Peering overview | VPC

Quotas and limits | VPC

Hub-and-spoke network architecture | Cloud Architecture Center

Cloud VPN overview | Google Cloud

by Francis at Jul 15, 2024, 10:58 PM

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Derrick

3 months ago

I disagree with D, too many attachments could complicate things.

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Mariann

3 months ago

Definitely going with D, it covers all bases!

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Aleisha

4 months ago

Wait, why would you only use one VLAN attachment in region 1? Sounds risky!

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Devora

4 months ago

I think B could work too, but not sure about the single VLAN in region 1.

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Onita

4 months ago

Option D seems like the best choice for redundancy.

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Mona

4 months ago

I feel like option A might be too limited since it only has two VLANs in total. We should probably aim for more redundancy across both regions.

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Annalee

5 months ago

I'm a bit confused about the metro zones. Did we cover if we should connect to both zones in each region or just one?

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Avery

5 months ago

I think option D sounds familiar from our practice questions. It seems to align with the geo-redundancy requirements we studied.

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Fletcher

5 months ago

I remember we discussed the importance of having multiple VLAN attachments for redundancy, but I'm not sure if it's necessary to have two in each region.

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Evette

5 months ago

This is a tricky one, but I think I can figure it out. I'll need to review the Google recommendations and make sure I'm following their best practices. Let me re-read the question and options carefully.

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Lynette

5 months ago

Okay, I think I've got this. The key is to create a Cloud Router in each region with VLAN attachments to the corresponding metro zones for redundancy. I'll go with option D since it seems to best match the instructions.

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Janine

5 months ago

Hmm, I'm a bit confused by the different metro zones and how they relate to the regions. I'll need to make sure I understand the topology and requirements before selecting an answer.

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Vicente

5 months ago

This seems like a straightforward question about setting up a hybrid cloud connectivity solution with geo-redundancy. I'll need to carefully read through the options and think about the Google-recommended practices mentioned.

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Louvenia

5 months ago

Okay, let's see. I think the Response Action element is used to control where the user navigates after the Integration Procedure is completed. That sounds like option C to me.

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Joesph

10 months ago

Option D all the way! Gotta love that geo-redundancy. It's like having a backup for your backup - just in case your backup fails.

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Sylvia

10 months ago

Hmm, this question is making my head spin. Maybe I should've taken that 'Cloud Router for Dummies' course before attempting this exam.

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Merilyn

8 months ago

D) Create a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone1-x and one VLAN attachment connected to metro1-zone2-x. Create a Cloud Router in region 2 with one VLAN attachment connected to metro2-zone1-x and one VLAN attachment to metro2-zone2-x.

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Dominga

8 months ago

C) Create a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone2-x. Create a Cloud Router in region 2 with one VLAN attachment connected to metro2-zone2-x.

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Corinne

9 months ago

B) Create a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone1-x. Create a Cloud Router in region 2 with two VLAN attachments connected to metro2-zone2-x.

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Alaine

9 months ago

A) Create a Cloud Router in region 1 with two VLAN attachments connected to metro1-zone1-x. Create a Cloud Router in region 2 with two VLAN attachments connected to metro1-zone2-x.

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Julianna

10 months ago

Option B seems a bit strange to me. Why would we connect the Cloud Router in region 2 to a different metro area than region 1? That doesn't seem very 'geo-redundant' to me.

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Rolande

9 months ago

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Fletcher

9 months ago

B) Option B seems a bit strange to me. Why would we connect the Cloud Router in region 2 to a different metro area than region 1? That doesn't seem very 'geo-redundant' to me.

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Ming

9 months ago

A) Create a Cloud Router in region 1 with two VLAN attachments connected to metro1-zone1-x. Create a Cloud Router in region 2 with two VLAN attachments connected to metro1-zone2-x.

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Kaycee

10 months ago

I'm not sure why we need to create two Cloud Routers. Wouldn't one Cloud Router with multiple VLAN attachments in each region be sufficient?

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Hildred

9 months ago

C) Create a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone2-x. Create a Cloud Router in region 2 with one VLAN attachment connected to metro2-zone2-x.

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Gwenn

10 months ago

B) Create a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone1-x. Create a Cloud Router in region 2 with two VLAN attachments connected to metro2-zone2-x.

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Louis

10 months ago

A) Create a Cloud Router in region 1 with two VLAN attachments connected to metro1-zone1-x. Create a Cloud Router in region 2 with two VLAN attachments connected to metro1-zone2-x.

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Lashandra

11 months ago

Option D looks like the best choice to me. Creating a Cloud Router in each region with VLAN attachments to multiple zones in the metro areas ensures geo-redundancy and follows the Google-recommended practices.

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Sueann

10 months ago

I agree, Option D provides the necessary redundancy across the two metropolitan areas. It's important to follow the recommended practices for a reliable Partner Interconnect hybrid cloud connectivity solution.

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