AWS Certified Solutions Architect – Associate (SAA-C03) — Question 211

A company previously migrated its data warehouse solution to AWS. The company also has an AWS Direct Connect connection. Corporate office users query the data warehouse using a visualization tool. The average size of a query returned by the data warehouse is 50 MB and each webpage sent by the visualization tool is approximately 500 KB. Result sets returned by the data warehouse are not cached.

Which solution provides the LOWEST data transfer egress cost for the company?

Answer options

• A. Host the visualization tool on premises and query the data warehouse directly over the internet.
• B. Host the visualization tool in the same AWS Region as the data warehouse. Access it over the internet.
• C. Host the visualization tool on premises and query the data warehouse directly over a Direct Connect connection at a location in the same AWS Region.
• D. Host the visualization tool in the same AWS Region as the data warehouse and access it over a Direct Connect connection at a location in the same Region.

Correct answer: D

Explanation

Option D is the correct choice because using a Direct Connect connection minimizes data transfer egress costs by keeping the data within the AWS network. Options A and B incur higher costs as they require data to travel over the internet. Option C, while it uses Direct Connect, does not take full advantage of the cost benefits of hosting both resources in the same region, as it still involves on-premises hosting.