An application consists of the following architecture.
a. EC2 Instances are in multiple AZ’s behind an ELB.b. The EC2 Instances are launched via an Auto Scaling Group.
c. There is a NAT instance used so that instances can download updates from the internet.
Due to the high bandwidth being consumed by the NAT instance, it has been decided to use a NAT Gateway. How could this be implemented?

Answer options:

A.Use NAT Instances along with the NAT Gateway.
B.Host the NAT instance in the private subnet.
C.Migrate from NAT Instance to a NAT Gateway and host the NAT Gateway in the public subnet.
D.Host the NAT gateway in the private subnet

Correct Answer – C
One can simply start using the NAT Gateway service and stop using the deployed NAT instances. But you need to ensure that the NAT Gateway is deployed in the public subnet.
For more information on migrating to a NAT Gateway, please visit the following URL-
https://aws.amazon.com/premiumsupport/knowledge-center/migrate-nat-instance-gateway/