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CLF-C02 practice question: Storage and data transfer pricing

Billing, Pricing, and Support A free question from our original CLF-C02 practice exam. Try it, then open the answer to see why each option is right or wrong.

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A company copies large nightly database backups from its application in the London Region (eu-west-2) to a backup account in the N. Virginia Region (us-east-1).

Finance wants to know which side of the transfer is charged.

How is this inter-Region data transfer billed?

Choose one answer.

  1. A. Both Regions charge, once when data leaves and again when it arrives
  2. B. Only data leaving the source Region is charged; data arriving is free
  3. C. Transfers between AWS Regions are always free, because they stay on the AWS network
  4. D. Only the destination Region charges, because it stores the new copy
Show the answer and explanation

Answer: B

  • A. Wrong: Data arriving in a Region is not charged. Only the outbound side carries a data transfer charge, so there is no second charge.
  • B. Right: AWS charges for data transferred out of the source Region. There is no charge for data transferred into the destination Region. Learn more: Understanding data transfer charges (opens in a new tab)
  • C. Wrong: Data moving between Regions is not free, even though it stays on the AWS network. The outbound side is billed by the source Region.
  • D. Wrong: The destination Region does not charge for incoming data. The transfer charge applies to data leaving the source Region.

Explanation

Inter-Region data transfer is charged on the outbound side, in the source Region. Data transferred into the destination Region has no transfer charge, although storing the copy is billed separately.

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