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CLF-C02 Practice Question 110: Data Transfer Charges

AWS Certified Cloud Practitioner (CLF-C02) · Test 11 · question 10 of 10

Billing, Pricing & Supporthard

A company is reviewing the data transfer charges for a web application that runs on Amazon EC2 in one AWS Region. Which statement about EC2 data transfer pricing is correct?

Select one answer
Show answer and explanation

Answer:

  • B. Data transfer into EC2 from the internet is free, but data transfer out is charged

In EC2 pricing, data transfer in from the internet costs $0 per GB, while data transfer out to the internet is charged per GB in tiers that get cheaper as volume grows. Every AWS customer does get 100 GB of data transfer out to the internet free each month, but that allowance is aggregated across all AWS services and Regions (except the China and GovCloud Regions), not granted per instance. This asymmetry matters for cost estimates: a workload that serves a lot of content to users pays mainly for what it *sends*.

Option A is wrong because inbound transfer from the internet isn't charged. Option C is wrong because data transfer between AWS Regions is charged per GB, even though it travels over the AWS network. That is worth remembering when designing multi-Region architectures. Option D gets the free allowance wrong: the 100 GB is a single monthly amount for the whole account across services and Regions, not an amount for each instance.

Reference: Amazon EC2 On-Demand pricing: data transfer

Practice Test 11 ›

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