How many total subnet IP ranges (primary and secondary) are allowed?

In Google Cloud, a VPC (Virtual Private Cloud) can contain both primary and secondary IP ranges for its subnets. Each subnet can have one primary IP range and up to five secondary ranges. This flexibility allows for the use of various IP address types, including those for custom applications or container services.

Considering this, if we assume the maximum number of subnets you can create, each with both a primary and five secondary ranges, you can estimate the total number of subnet IP ranges. Each subnet contributes at least one primary range, and potentially five secondary ranges, resulting in six ranges per subnet. The combination allows for a significant number of IP allocations, supporting diverse networking needs.

However, Google Cloud imposes a limit on the total number of IP ranges you can create across your project. The total ceiling is 3,100. This total accounts for the cumulative limit across all your subnets, which enables efficient management and organization of IP allocations within a VPC.

This cumulative total aligns with the correct answer, providing a solid understanding of subnet IP range capacities within the Google Cloud framework.