CLF-C02 Question 292
Select 2A company is hosting its web application on Amazon EC2 instances in the AWS US East (N. Virginia) Region. They want to transfer data from these instances to an S3 bucket in the same Region and also to an EC2 instance in the AWS EU (Ireland) Region. Which of the following statements correctly describes the associated data transfer costs?
- A
Data transfer from the EC2 instances to the S3 bucket in the same Region is free.
- B
Data transfer from the EC2 instances to the S3 bucket in the same Region incurs a charge.
- C
Data transfer from the EC2 instances in the US East (N. Virginia) Region to the EC2 instance in the EU (Ireland) Region incurs a charge.
- D
Data transfer from the EC2 instances in the US East (N. Virginia) Region to the EC2 instance in the EU (Ireland) Region is free.
Show answer and explanation
Correct answers: A, C
Explanation
Understanding AWS data transfer costs is essential for managing cloud expenses. Data transfer within the same Region, such as from EC2 to S3, is free when using the public or private AWS network. However, data transfer between Regions, such as from EC2 in US East to EC2 in EU, incurs a charge. This distinction is important for optimizing costs when designing applications across multiple Regions.
- A. Correct.
Correct: Transferring data from EC2 instances to an S3 bucket in the same Region is free when using the public or private AWS network.
- B. Incorrect.
Incorrect: There is no charge for data transfer between EC2 and S3 within the same Region.
- C. Correct.
Correct: Data transfer between Regions (e.g., from US East to EU) incurs a cost, as it involves inter-Region data transfer.
- D. Incorrect.
Incorrect: Inter-Region data transfer is not free and is charged based on the volume of data transferred.