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AWS Certified Solutions Architect – Associate SAA-C03 · Domain 4: Design Cost-Optimized Architectures

Data transfer costs: inter-AZ, inter-Region and internet egress, NAT gateway charges vs gateway endpoints, and CloudFront

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Last reviewed September 30, 2026 · Leer en español

Data transfer charges are the hidden cost in many AWS architectures, because they depend on the path traffic takes rather than on any single resource you can point to. Prices vary by Region and change over time, so the exam focuses on the pattern: which flows are free, which cost a little and which cost the most, and how to redesign traffic paths to pay less without giving up resilience.

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