Exam AWS Certified Cloud Practitioner topic 1 question 595 discussion

A is correct: https://aws.amazon.com/blogs/architecture/overview-of-data-transfer-costs-for-common-architectures/

D. Data transfer between Availability Zones AWS does not charge for data transfer between Availability Zones located within the same AWS Region. This includes any data exchanged between resources (such as EC2 instances, RDS databases, S3 buckets, etc.) in different Availability Zones within the same region.

The answer is C. Inbound data transfer refers to the transfer of data from the Internet into AWS. In some cases, inbound data transfers may incur fees, depending on the size of the data and the services used. Therefore, this is not an entirely correct option.

A is the correct answer: https://aws.amazon.com/blogs/architecture/overview-of-data-transfer-costs-for-common-architectures/

ONLY inbound data transfer from the internet is free, generally. Any inter-regions/AZs will incur charges per GB.

Pay attention at the word "between", which means another. The right answer is A.

I vote for A. However A and D are correct.

D. Data transfer between Availability Zones When transferring data between Availability Zones within the same AWS Region, there is no data transfer cost. Availability Zones are separate data centers within a region, and network traffic between them is treated as local traffic. Therefore, transferring data between Availability Zones incurs no additional charges for data transfer.

There is no charge for inbound data transfer across all services in all Regions. Data transfer from AWS to the internet is charged per service, with rates specific to the originating Region Data transfer within the same Availability Zone is free. One way to achieve high availability for a workload is to deploy in multiple Availability Zones.

If the company is transferring the data to an AWS service that allows for free inbound data transfer from the internet, then option A (Inbound data transfer from the internet) would be the correct answer. Inbound data transfer from the internet to AWS services can be free in some cases, but it depends on the specific service and region where the service is located. If the company knows which AWS service they are transferring the data to, they should check the AWS pricing page to confirm whether inbound data transfer from the internet to that service is free or not. If the service allows for free inbound data transfer from the internet, then option A would be the correct answer.

c is correct : Data transfer between AWS Regions (option C) would result in no cost for the company for the first 2 TB of data transferred, as long as the source and destination regions are within the same AWS account. Therefore, option C is the correct answer.

D. Data transfer between Availability Zones The following types of data transfer within AWS do not incur any cost: Data transfer between EC2 instances in the same Availability Zone. Data transfer between Amazon S3 and Amazon EC2 instances in the same AWS Region. Data transfer between Amazon S3 buckets or Amazon DynamoDB tables in the same AWS Region. Therefore, option D, Data transfer between Availability Zones, could be done without incurring any additional cost, provided that the transfer is within the same region.

ata transfer between Availability Zones is typically no cost for the company. When you transfer data between Amazon EC2 instances in the same Availability Zone, there is no data transfer charge.

A is the answer.