A company is running an application on Amazon EC2 instances hosted in a private subnet of a VPC. The EC2 instances are configured in an Auto Scaling group behind an Elastic Load Balancer (ELB). The EC2 instances use a NAT gateway for outbound internet access. However, the EC2 instances are not able to connect to the public internet to download software updates.
What are the possible root causes of this issue? (Choose two.)

A. The ELB is not configured with a proper health check.

B. The route tables in the VPC are configured incorrectly.

C. The EC2 instances are not associated with an Elastic IP address.

D. The security group attached to the NAT gateway is configured incorrectly.

E. The outbound rules on the security group attached to the EC2 instances are configured incorrectly.






 

Suggested Answer: BD

Community Answer: BE

Reference:
https://docs.aws.amazon.com/vpc/latest/peering/vpc-peering-routing.html
 https://forums.aws.amazon.com/thread.jspa?threadID=226927


This question is in SAA-C02 AWS Certified Solutions Architect – Associate Exam
For getting AWS Certified Solutions Architect – Associate Certificate




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