AWS Certified Solutions Architect – Professional — Question 440

An organization is setting up a multi-site solution where the application runs on premise as well as on AWS to achieve the minimum recovery time objective(RTO).
Which of the below mentioned configurations will not meet the requirements of the multi-site solution scenario?

Answer options

• A. Configure data replication based on RTO.
• B. Keep an application running on premise as well as in AWS with full capacity.
• C. Setup a single DB instance which will be accessed by both sites.
• D. Setup a weighted DNS service like Route 53 to route traffic across sites.

Correct answer: C

Explanation

In a multi-site active-active disaster recovery deployment, both the on-premises and AWS environments must have localized access to data to ensure low latency and continuous availability. Utilizing a single database instance accessed by both sites introduces a single point of failure and severe latency issues, which defeats the purpose of a multi-site architecture. The other options, such as replicating data and routing traffic via Route 53, are standard best practices for achieving minimum RTO.