Google Professional Cloud Network Engineer Question 241
Single answerGoogle Cloud PlatformYou are designing a hybrid network architecture between your on-premises data center and Google Cloud. Your on-premises network uses a dynamic routing protocol (BGP), and you want to ensure proper communication with your Google Cloud environment. Within your Google Cloud VPC, you have multiple subnets in different regions. How should you configure routing to ensure efficient and scalable communication between your on-premises network and all VPC subnets?
- A
Configure a Cloud Router with dynamic routing and set the dynamic routing mode to Regional.
- B
Configure a Cloud Router with dynamic routing and set the dynamic routing mode to Global.
- C
Manually configure static routes for each subnet in your VPC to route traffic to the on-premises environment.
- D
Enable VPC Peering between all subnets and manually configure static routes for communication with the on-premises environment.
Show answer and explanation
Correct answer: B
Explanation
To ensure efficient and scalable communication between an on-premises network and a Google Cloud VPC with subnets in multiple regions, you should configure a Cloud Router with dynamic routing. Setting the dynamic routing mode to 'Global' ensures that all learned routes are propagated across regions, enabling seamless communication across the hybrid network. Static routes and regional dynamic routing modes are less efficient and scalable for this use case.
- A. Incorrect.
This option is incorrect because setting the dynamic routing mode to 'Regional' limits the propagation of learned routes to only the specific region, which would not ensure proper routing to all subnets across regions.
- B. Correct.
This is the correct option because configuring a Cloud Router with dynamic routing and setting the dynamic routing mode to 'Global' allows learned routes to be propagated across all regions in the VPC. This ensures scalable and efficient routing for hybrid networks.
- C. Incorrect.
This option is incorrect because manually configuring static routes for each subnet is not scalable and does not leverage the benefits of dynamic routing with a Cloud Router.
- D. Incorrect.
This option is incorrect because VPC Peering is not relevant for communication between on-premises networks and the VPC. Additionally, static routes are not efficient for dynamic environments.