SAP-C02 Question 180
Single answerA company is hosting a business-critical application on AWS that requires high availability and must be resilient to regional outages. The company wants to ensure business continuity with minimal downtime, even in the event of a disaster impacting an entire AWS Region. Which solution should you design to meet these requirements?
- A
Deploy the application across multiple Availability Zones within a single AWS Region and use an Elastic Load Balancer to distribute traffic.
- B
Use AWS Global Accelerator to route traffic to multiple AWS Regions, each hosting a fully replicated instance of the application.
- C
Deploy the application in a single AWS Region and configure Amazon S3 Cross-Region Replication for data backups.
- D
Set up an active-active architecture across multiple AWS Regions using Route 53 latency-based routing and application replication.
Show answer and explanation
Correct answer: D
Explanation
To ensure business continuity during a regional outage, a multi-region active-active architecture is the best approach. By leveraging Route 53 latency-based routing, traffic can be routed to the closest healthy region, ensuring minimal downtime and high availability. This solution meets the requirements for resilience and ensures that the application continues to operate seamlessly even if an entire region is impacted.
- A. Incorrect.
While deploying across multiple Availability Zones provides high availability within a single AWS Region, it does not protect against regional outages, which is a key requirement of the scenario.
- B. Incorrect.
AWS Global Accelerator can route traffic to multiple regions, but it does not by itself replicate the application or manage failover. Additional architecture is needed to ensure business continuity.
- C. Incorrect.
Cross-Region Replication for Amazon S3 ensures data is backed up across regions, but it does not help maintain application availability during a regional outage.
- D. Correct.
An active-active architecture across multiple AWS Regions, combined with Route 53 latency-based routing, ensures the application remains available during a regional outage and provides high availability with low latency for users.