# Official sources

Use this reference only when you need source grounding for AWS service behavior or the detailed source list.

## AWS documentation

Use these as starting points, not as proof of the user's live AWS state:
- https://docs.aws.amazon.com/vpc/latest/userguide/what-is-amazon-vpc.html
- https://docs.aws.amazon.com/vpc/latest/tgw/tgw-best-design-practices.html
- https://docs.aws.amazon.com/aws-technical-content/latest/aws-vpc-connectivity-options/network-to-amazon-vpc-connectivity-options.html
- https://docs.aws.amazon.com/whitepapers/latest/building-scalable-secure-multi-vpc-network-infrastructure/transit-gateway.html

## Grounding rule

Official documentation explains AWS service behavior. It does not prove the user's current account, Region, quota, resource configuration, IAM boundary, pricing, or operational state. Prefer live AWS MCP/CLI evidence or sanitized user-provided evidence for current-state claims.
