CLF-C02 Question 291
Single answerYou are running an application in AWS that processes large volumes of data. The application stores data in Amazon S3 in the us-east-1 Region and sends processed data to an EC2 instance in the us-west-2 Region for further analysis. Which of the following is true about the data transfer costs in this scenario?
- A
There is no cost for data transfer between different AWS Regions.
- B
Data transfer from Amazon S3 in us-east-1 to an EC2 instance in us-west-2 incurs a charge.
- C
Data transfer within the same AWS Region, such as between S3 and EC2 in us-east-1, is always free.
- D
Data transfer from Amazon S3 to the internet is always free, regardless of the amount.
Show answer and explanation
Correct answer: B
Explanation
When transferring data between AWS Regions (inter-Region), AWS charges for the outgoing data transfer. In this scenario, data is being transferred from S3 in us-east-1 to an EC2 instance in us-west-2, which incurs an inter-Region data transfer charge. Understanding data transfer costs is important for optimizing your application's architecture and reducing costs.
- A. Incorrect.
This is incorrect. There is a cost for data transfer between different AWS Regions, also known as inter-Region data transfer.
- B. Correct.
This is correct. AWS charges for inter-Region data transfer when data is sent from S3 in one Region to an EC2 instance in another Region.
- C. Incorrect.
This is incorrect. While some data transfers within the same Region (intra-Region) are free, such as between certain AWS services, not all intra-Region transfers are free.
- D. Incorrect.
This is incorrect. Data transfer from S3 to the internet incurs a cost, depending on the amount of data transferred.