Virtual Private Cloud Quiz
Currently, you have a NAT Gateway defined for your private instances. You need to make the NAT Gateway highly available. How can this be accomplished?
A. Create another NAT Gateway and place is behind an ELB.
B. Create a NAT Gateway in another Availability Zone.
C. Create a NAT Gateway in another region.
D. Use Auto Scaling groups to scale the NAT Gateway.
B. Create a NAT Gateway in another Availability Zone.
AWS Documentation mentions the following:
If you have resources in multiple Availability Zones and they share one NAT Gateway, in the event that the NAT Gateway’s Availability Zone is down, resources in the other Availability Zones lose internet access. To create an Availability Zone-independent architecture, create a NAT Gateway in each Availability Zone and configure your routing to ensure that resources use the NAT Gateway in the same Availability Zone.
For more information on the NAT Gateway, please refer to the below URL:
https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-nat-gateway.html
