SOA-C02 Networking and Content Delivery Practice Question
Network Topology
Refer to the exhibit. A SysOps Administrator runs the above command and sees that an EC2 instance is unhealthy. The health check is configured to check the HTTP endpoint '/health' on port 80. The instance's security group allows inbound HTTP traffic from the ALB's security group. What is the MOST likely cause?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The application on the instance is not configured to respond to the '/health' path.
The health check path is '/health', but the application on the instance might not have that endpoint configured, causing the health check to fail. Option A is incorrect because the instance is associated with the target group; otherwise it would not appear in the health check results. Option C is incorrect because the target group is configured to use port 80, as stated in the scenario. Option D is incorrect because the security group on the instance does allow inbound HTTP traffic from the ALB's security group, as stated in the scenario.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The instance is not associated with the target group.
Why it's wrong here
Incorrect. The instance is associated with the target group; otherwise it would not be listed as unhealthy.
- ✓
The application on the instance is not configured to respond to the '/health' path.
Why this is correct
Correct. The health check endpoint '/health' is not properly handled by the application, causing the health check to fail.
- ✗
The target group is configured to use port 8080 instead of port 80.
Why it's wrong here
Incorrect. The target group is configured to use port 80, not port 8080.
- ✗
The security group on the instance does not allow inbound traffic from the ALB.
Why it's wrong here
Incorrect. The security group on the instance allows inbound HTTP traffic from the ALB's security group, so this is not the cause of the health check failure.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SOA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SOA-C02 exam.