Google Professional Cloud Network Engineer Question 195
Select 2Google Cloud PlatformYou are designing a VPC network in Google Cloud for a multi-tier application. The application consists of frontend, backend, and database tiers, each requiring its own subnet. You also need to reserve additional IP ranges for alias IPs to be assigned to containerized workloads managed by Google Kubernetes Engine (GKE). What should you consider when planning your subnets and alias IP ranges?
- A
Ensure each subnet has a unique, non-overlapping CIDR range.
- B
Configure alias IP ranges within the same CIDR block as the primary subnet range.
- C
Plan for alias IP ranges to be within the /24 range for GKE workloads.
- D
Reserve alias IP ranges that do not overlap with the primary subnet or other alias IP ranges.
- E
Use the default subnet mode for the VPC to automatically handle alias IPs for GKE.
Show answer and explanation
Correct answers: A, D
Explanation
When planning subnets and alias IPs, it is essential to ensure that all subnets and alias IP ranges are unique and non-overlapping. This prevents IP conflicts within the VPC. Alias IP ranges are particularly important for workloads like GKE and must be explicitly planned and configured to avoid overlaps with primary subnet ranges or other alias ranges. The default subnet mode of a VPC does not automatically handle alias IPs, so manual configuration is necessary.
- A. Correct.
This is correct. Each subnet in a VPC must have a unique, non-overlapping CIDR range to avoid IP conflicts.
- B. Incorrect.
This is incorrect. Alias IP ranges must be allocated from a CIDR block that does not overlap with the primary subnet range or other alias ranges.
- C. Incorrect.
This is incorrect. While alias IP ranges need to be appropriately sized, there is no specific requirement for them to be within a /24 range for GKE workloads.
- D. Correct.
This is correct. Alias IP ranges must not overlap with the primary subnet IP range or any other alias IP range to prevent conflicts.
- E. Incorrect.
This is incorrect. The default subnet mode does not automatically assign alias IPs for GKE; you need to explicitly configure alias IP ranges when required.