AWS DevOps Engineer - Professional

By Amazon · Question Mode

QuestionQ33

Resilient Cloud Solutions

A company needs its internally facing web application to be highly available. Its architecture consists of one Amazon EC2 web server instance and one NAT instance that supplies outbound internet access for updates and access to public data.

Which combination of architectural changes should the company make to achieve high availability?

Choose two
Explanation

High availability for the web tier requires multiple EC2 instances distributed across multiple Availability Zones and an Application Load Balancer to route requests only to healthy targets. For resilient outbound internet access, deploy a NAT gateway in each Availability Zone and configure route tables so resources use the NAT gateway in their own Availability Zone. AWS states that sharing one NAT gateway across Availability Zones can cause the other zones to lose internet access if the NAT gateway’s zone fails.

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