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AWS Certified Solutions Architect study material · question 87 of 500

An application in Sydney calls AWS STS and wants to reduce latency. What can it do, and what is the effect on the credentials?

  1. Cache the credentials indefinitely to avoid further calls
  2. Call a nearer Regional STS endpoint; the credentials still work globally
  3. Call a nearer Regional endpoint; the credentials then work only in that Region
  4. Nothing, because STS has only a global endpoint
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Answer: B. Call a nearer Regional STS endpoint; the credentials still work globally

STS defaults to a global endpoint but accepts Regional calls to cut latency, and credentials from any Region work everywhere.

Source: Temporary security credentials in IAM (Amazon Web Services) — AWS STS and AWS regions

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