Google Professional Cloud Network Engineer Exam - Topic 2 Question 93 Discussion

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

Question #: 93
Topic #: 2

[All Professional Cloud Network Engineer Questions]

You are designing the architecture for your organization so that clients can connect to certain Google APIs. Your plan must include a way to connect to Cloud Storage and BigQuery. You also need to ensure the traffic does not traverse the internet. You want your solution to be cloud-first and require the least amount of configuration steps. What should you do?

AConfigure Private Google Access on the VPC resource. Create a default route to the internet.

BConfigure Private Google Access on the subnet resource. Create a default route to the internet.

CConfigure Cloud NAT and remove the default route to the internet.

DConfigure a global Secure Web Proxy and remove the default route to the internet.

Show Suggested Answer

Suggested Answer: D

This answer follows the Google-recommended practices for using privately used public IP (PUPI) addresses for GKE Pod address blocks1. The benefits of this approach are:

It allows you to use any public IP addresses that are not owned by Google or your organization for your Pods, which can help mitigate address exhaustion in your enterprise.

It prevents any external traffic from reaching your Pods, as Google Cloud does not route PUPI addresses to the internet or to other VPC networks by default.

It enables you to use VPC Network Peering to connect your GKE cluster to other VPC networks that use different PUPI addresses, as long as you enable the export and import of custom routes for the peering connection.

It preserves the fully integrated network model of GKE, where Pods can communicate with nodes and other resources in the same VPC network without NAT.

The options that you need to select when creating a private GKE cluster with PUPI addresses are:

--disable-default-snat: This option disables source NAT for outbound traffic from Pods to destinations outside the cluster's VPC network.This is necessary to prevent Pods from using RFC 1918 addresses as their source IP addresses, which could cause conflicts with other networks that use the same address space2.

--enable-ip-alias: This option enables alias IP ranges for Pods and Services, which allows you to use separate subnet ranges for them.This is required to use PUPI addresses for Pods1.

--enable-private-nodes: This option creates a private cluster, where nodes do not have external IP addresses and can only communicate with the control plane through a private endpoint.This enhances the security and privacy of your cluster3.

Option A is incorrect because it does not use PUPI addresses for Pods, but rather RFC 1918 addresses. This does not solve the problem of address exhaustion in your enterprise. Option B is incorrect because it reuses the secondary address range for Services across multiple private GKE clusters, which could cause IP conflicts and routing issues. Option C is incorrect because it does not specify the options that are needed to create a private GKE cluster with PUPI addresses.

by Alayna at Sep 16, 2024, 06:10 AM

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Melissia

4 months ago

B is definitely the simplest option here!

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Fairy

4 months ago

I think A is too complicated for a cloud-first approach.

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Lennie

4 months ago

Wait, why would you want a default route to the internet at all?

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Laurena

4 months ago

I disagree, C seems more secure with Cloud NAT.

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Louann

4 months ago

Option B is the way to go for private access!

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Bulah

5 months ago

I vaguely remember that Cloud NAT is used for private access, but I’m not sure if it’s the best choice for this scenario. I’ll have to think about the implications of removing the default route.

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Lenna

5 months ago

I’m a bit confused about the default route. I thought we needed to remove it to keep traffic private, but I can’t recall if that applies to all options here.

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Alexia

5 months ago

I think I practiced a question similar to this where we had to ensure traffic stayed private. I feel like configuring on the subnet might be the right approach.

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Jesus

5 months ago

I remember something about Private Google Access being important for accessing Google APIs without going through the internet, but I'm not sure if it should be on the VPC or subnet.

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Margart

5 months ago

The other options don't seem to fully address the requirement of not traversing the internet. I think C is the best choice here.

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Quiana

5 months ago

Yeah, I agree with Maybelle. Configuring Cloud NAT and removing the default route seems like the most direct way to achieve the desired architecture.

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Lynelle

5 months ago

Okay, let's think this through step-by-step. We need to connect to Cloud Storage and BigQuery without traversing the internet, and the solution should be cloud-first with minimal configuration.

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Darrin

5 months ago

This question seems straightforward, but I want to make sure I understand the requirements correctly before choosing an answer.

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Maybelle

5 months ago

I'm leaning towards option C - configuring Cloud NAT and removing the default route to the internet. That seems to align with the requirements.

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Mozelle

6 months ago

In our coding exercises, we covered deprecated HTML, but I don't think that would make the browser freeze. It's more about compatibility issues than performance.

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Johana

10 months ago

I'm going with B. It's the most straightforward way to get the job done without any unnecessary complexity.

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Sarah

9 months ago

User 3: Yeah, B is definitely the way to go. It's straightforward and gets the job done.

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Paulina

9 months ago

User 2: Agreed, B seems like the most efficient choice for this scenario.

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Pura

10 months ago

User 1: I think B is the best option too. It's simple and direct.

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Caprice

10 months ago

D is an interesting idea, but setting up a global Secure Web Proxy seems like overkill for this use case. I'd rather keep things simple.

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Jin

9 months ago

C) Configure Cloud NAT and remove the default route to the internet.

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Kimbery

9 months ago

B) Configure Private Google Access on the subnet resource. Create a default route to the internet.

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Deangelo

10 months ago

A) Configure Private Google Access on the VPC resource. Create a default route to the internet.

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Nicolette

11 months ago

Option C with Cloud NAT sounds interesting, but I'm not sure if that would still allow me to access the internet directly. Hmm, tough choice.

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Shawnda

10 months ago

User 2: But will that still allow us to access the internet directly? I'm not sure about that.

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Reed

10 months ago

User 1: I think option C with Cloud NAT is the way to go. It removes the default route to the internet.

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Kathrine

11 months ago

Why do you think option C is better?

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Adaline

11 months ago

I think the correct answer is B. Configuring Private Google Access on the subnet resource and creating a default route to the internet seems like the simplest and most cloud-first solution.

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Kenny

10 months ago

Yes, by using Private Google Access on the subnet resource, we can achieve that without adding unnecessary complexity.

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Nettie

10 months ago

It's important to ensure the traffic stays within the Google Cloud network for security and performance reasons.

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Cecily

10 months ago

I agree, that option seems to align with the requirements of connecting to Cloud Storage and BigQuery without traversing the internet.

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Clare

10 months ago

I think the correct answer is B. Configuring Private Google Access on the subnet resource and creating a default route to the internet seems like the simplest and most cloud-first solution.

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Luis

11 months ago

I disagree, I believe option C is the best choice.

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Kathrine

11 months ago

I think we should go with option A.

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