Google Professional Cloud Network Engineer Question 156
Select 2Google Cloud PlatformYou are designing a hybrid network between your company's on-premises data center and Google Cloud. The on-premises network uses the CIDR range 192.168.0.0/16 for internal workloads. You plan to create a VPC in Google Cloud and need to define its IP address range. Which of the following considerations will help you avoid IP overlap issues?
- A
Use a non-overlapping CIDR range, such as 10.0.0.0/16, for the Google Cloud VPC.
- B
Split the on-premises CIDR range into smaller subnets and reuse one of them in Google Cloud.
- C
Verify that the CIDR range chosen for the VPC does not conflict with any existing or future planned IP ranges in your on-premises network.
- D
Use the same CIDR range (192.168.0.0/16) in the Google Cloud VPC for simplicity.
- E
Select a CIDR range from the reserved IP ranges (e.g., 127.0.0.0/8) for the Google Cloud VPC.
Show answer and explanation
Correct answers: A, C
Explanation
When designing a hybrid network, avoiding IP address overlaps between the on-premises network and the Google Cloud VPC is critical for reliable communication. Selecting a CIDR range that does not overlap with the on-premises network (or its potential future extensions) ensures seamless connectivity. Reusing or duplicating address ranges across environments will lead to conflicts, while reserved ranges are invalid for use in private networks.
- A. Correct.
Correct: Using a non-overlapping CIDR range ensures that the Google Cloud VPC and the on-premises network do not have conflicting IP addresses.
- B. Incorrect.
Incorrect: Reusing a portion of the on-premises CIDR range in Google Cloud could lead to IP address conflicts, especially during hybrid network communication.
- C. Correct.
Correct: It is crucial to ensure that the chosen CIDR range for the Google Cloud VPC not only avoids overlaps with the current on-premises network but also with any future planned expansions.
- D. Incorrect.
Incorrect: Using the same CIDR range in both environments will result in IP conflicts, making communication between the on-premises network and the VPC unreliable.
- E. Incorrect.
Incorrect: Reserved IP ranges like 127.0.0.0/8 are not valid for use as private CIDR ranges in a VPC.