Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 354 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional SAP-C02

Question #: 354
Topic #: 1

[All AWS Certified Solutions Architect - Professional SAP-C02 Questions]

A solutions architect is reviewing an application's resilience before launch. The application runs on an Amazon EC2 instance that is deployed in a private subnet of a VPC. The EC2 instance is provisioned by an Auto Scaling group that has a minimum capacity of 1 and a maximum capacity of 1. The application stores data on an Amazon RDS for MySQL DB instance. The VPC has subnets configured in three Availability Zones and is configured with a single NAT gateway.

The solutions architect needs to recommend a solution to ensure that the application will operate across multiple Availability Zones.

Which solution will meet this requirement?

A. Deploy an additional NAT gateway in the other Availability Zones. Update the route tables with appropriate routes. Modify the RDS for MySQL DB instance to a Multi-AZ configuration. Configure the Auto Scaling group to launch the instances across Availability Zones. Set the minimum capacity and maximum capacity of the Auto Scaling group to 3.
B. Replace the NAT gateway with a virtual private gateway. Replace the RDS for MySQL DB instance with an Amazon Aurora MySQL DB cluster. Configure the Auto Scaling group to launch instances across all subnets in the VPC. Set the minimum capacity and maximum capacity of the Auto Scaling group to 3.
C. Replace the NAT gateway with a NAT instance. Migrate the RDS for MySQL DB instance to an RDS for PostgreSQL DB instance. Launch a new EC2 instance in the other Availability Zones.
D. Deploy an additional NAT gateway in the other Availability Zones. Update the route tables with appropriate routes. Modify the RDS for MySQL DB instance to turn on automatic backups and retain the backups for 7 days. Configure the Auto Scaling group to launch instances across all subnets in the VPC. Keep the minimum capacity and the maximum capacity of the Auto Scaling group at 1.

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Suggested Answer: A 🗳️

by cypkir at Nov. 22, 2023, 7:30 a.m.

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duriselvan

Highly Voted 1 year ago

A ans Best practices If your resources span multiple Availability Zones (AZ) , then create one NAT gateway per AZ. This helps to avoid a single point of failure and zone data transfer charges. Data that's transferred between Amazon EC2 and Elastic Network Interfaces in the same AZ is free. However, data that's transferred to and from Amazon EC2 and Elastic Network Interfaces across multiple AZs in the same AWS Region is charged. The charges depend on the data transfer rates for the Region. https://repost.aws/knowledge-center/nat-gateway-vpc-private-subnet

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