AWS Certified Solutions Architect – Professional SAP-C01 – Question163

An organization is setting up an application on AWS to have both High Availability (HA) and Disaster Recovery (DR). The organization wants to have both Recovery point objective (RPO) and Recovery time objective (RTO) of 10 minutes.
Which of the below mentioned service configurations does not help the organization achieve the said RPO and RTO?

A. Take a snapshot of the data every 10 minutes and copy it to the other region.
B. Use an elastic IP to assign to a running instance and use Route 53 to map the user's domain with that IP.
C. Create ELB with multi-region routing to allow automated failover when required.
D. Use an AMI copy to keep the AMI available in other regions.

Correct Answer: C

Explanation:

Explanation: AWS provides an on demand, scalable infrastructure. AWS EC2 allows the user to launch On- Demand instances and the organization should create an AMI of the running instance. Copy the AMI to another region to enable Disaster Recovery (DR) in case of region failure. The organization should also use EBS for persistent storage and take a snapshot every 10 minutes to meet Recovery time objective (RTO).
They should also setup an elastic IP and use it with Route 53 to route requests to the same IP. When one of the instances fails the organization can launch new instances and assign the same EIP to a new instance to achieve High Availability (HA). The ELB works only for a particular region and does not route requests across regions.
Reference: http://d36cz9buwru1tt.cloudfront.net/AWS_Disaster_Recovery.pdf