An enterprise hosts a critical client-facing web application in the us-east-1 Region. The compute tier consists of a Java application running on Amazon EC2 instances inside private subnets, managed by an Auto Scaling group behind an Application Load Balancer (ALB). The storage tier consists of an Amazon RDS for PostgreSQL database in a Single-AZ deployment, and shared files are stored on an Amazon Elastic File System (Amazon EFS) file system. Outbound integrations for the application currently rely on a single NAT Gateway in us-east-1.
The enterprise wants to implement a disaster recovery (DR) solution in the us-west-2 Region using a warm standby strategy. The solution must achieve a Recovery Time Objective (RTO) of 30 minutes and a Recovery Point Objective (RPO) of 5 minutes. Additionally, the solutions architect must improve the reliability of outbound internet connections within the primary region to prevent single-point-of-failure events.
Which of the following combinations of actions should the solutions architect implement to meet these requirements? (Select TWO.)
- Deploy a NAT Gateway in each Availability Zone in the primary region's VPC, and configure the private subnet route tables to direct outbound traffic to the local NAT Gateway.Cevap
- Enable Amazon EFS replication from us-east-1 to us-west-2, and provision an Amazon RDS for PostgreSQL cross-region read replica in us-west-2.Cevap
- CImplement daily AWS Backup copy jobs to replicate RDS and EFS snapshots from us-east-1 to us-west-2, and script a recovery process using AWS Lambda.
- DAssociate the Route 53 private hosted zone used for internal service resolution with the us-east-1 VPC, but delay associating it with the us-west-2 VPC until a failover event is initiated.
- ERetain the single NAT Gateway in us-east-1 and add a backup route pointing directly to the Internet Gateway in the private subnet route tables to handle outbound failover.