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Hello Jonathan Barbosa,
Thank you for the feedback.
It’s true that moving data between Availability Zones (AZs) within the same AWS Region incurs costs that fall under the UsageType called Region-DataTransfer-Regional-Bytes. However, the reason this particular option wasn’t selected as a correct answer is due to the inaccurate use of AWS terminology in the phrasing. The option refers to this as “regional data transfer,” which typically refers to inter-region transfers, not cross-AZ traffic within the same Region
The Option States:
Consider moving your EC2 instances to the same AZ since data transferred between AZs is considered billable for “regional data transfer”.
This option mixes terms inaccurately:
It talks about data transfer between Availability Zones, which is real and billable. However, it then refers to it as “regional data transfer,” which in AWS terminology typically refers to data transferred between Regions, not availability zones (AZs).
I hope this helps! Please let us know if you need further assistance.
Regards,
JR @ Tutorials Dojo
