How do the AWS service limits typically apply to an account?

The correct understanding is that AWS service limits are specific to each region. This means that the maximum capacity for various services, such as the number of EC2 instances or storage allocations, can differ depending on the geographical region in which those resources are provisioned. For example, an account might have different limits for EC2 instance types in the US East (N. Virginia) region compared to the Asia Pacific (Tokyo) region.

This approach allows AWS to allocate resources based on regional demand and capacity, ensuring better performance and availability. Each region operates somewhat independently regarding service capacity, so customers can tailor their resource allocation according to their needs specific to that geographical area.

Other options do not accurately reflect the nature of AWS service limits. Some limits, for instance, are not uniform across all accounts and can vary based on account history or usage. While it is possible to request increases to certain limits, these requests do not suggest a blanket capability that applies across all accounts or regions and are subject to approval by AWS.