SOA-C03 · Question #35
SOA-C03 Question #35: Real Exam Question with Answer & Explanation
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Question
Application A runs on Amazon EC2 instances behind a Network Load Balancer (NLB). The EC2 instances are in an Auto Scaling group and are in the same subnet that is associated with the NLB. Other applications from an on-premises environment cannot communicate with Application A on port 8080. To troubleshoot the issue, a CloudOps engineer analyzes the flow logs. The flow logs include the following records: ACCEPT from 192.168.0.13:59003 172.31.16.139:8080 REJECT from 172.31.16.139:8080 192.168.0.13:59003 What is the reason for the rejected traffic?
Options
- AThe security group of the EC2 instances has no Allow rule for the traffic from the NLB.
- BThe security group of the NLB has no Allow rule for the traffic from the on-premises environment.
- CThe ACL of the on-premises environment does not allow traffic to the AWS environment.
- DThe network ACL that is associated with the subnet does not allow outbound traffic for the
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