Amazon Exam SCS-C02 Topic 8 Question 28 Discussion

Actual exam question for Amazon's SCS-C02 exam

Question #: 28
Topic #: 8

A Network Load Balancer (NLB) target instance is not entering the InService state. A security engineer determines that health checks are failing.

Which factors could cause the health check failures? (Select THREE.)

AThe target instance's security group does not allow traffic from the NLB.

BThe target instance's security group is not attached to the NLB.

CThe NLB's security group is not attached to the target instance.

DThe target instance's subnet network ACL does not allow traffic from the NLB.

EThe target instance's security group is not using IP addresses to allow traffic from the NLB.

FThe target network ACL is not attached to the NLB.

Show Suggested Answer

Suggested Answer: A, C, D

by julien at Sep 16, 2024, 09:43 AM

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3 days ago

I think the health check failures could be caused by the target instance's security group not allowing traffic from the NLB.

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10 days ago

Hmm, I'd say A, D, and E as well. The target instance needs to be wide open to the NLB for those health checks to pass.

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11 days ago

A, D, and E seem like the most likely culprits here. Can't have the security group or network ACL blocking the NLB traffic.

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