Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company runs an application on Amazon EC2 instances behind an Application Load Balancer (ALB). The ALB terminates SSL/TLS and forwards traffic to the instances over HTTP. The SysOps administrator needs to capture the original client IP address in the instance logs. How should the administrator configure this?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Enable stickiness on the ALB target group.
Stickiness (session affinity) ensures a client's requests are sent to the same target. It does not provide the client IP to the instances.
B
Best answer
Enable the X-Forwarded-For header on the ALB.
The ALB automatically adds the X-Forwarded-For header containing the original client IP address when terminating TLS. The backend instances can log this header to capture the client IP.
C
Distractor review
Configure the ALB to use Proxy Protocol v2.
Proxy Protocol is used with Network Load Balancers to preserve the client IP. ALB uses X-Forwarded-For headers instead.
D
Distractor review
Enable access logs on the ALB and store them in Amazon S3.
Access logs capture detailed information about requests sent to the ALB, including client IP, but they are stored in S3, not available directly on the EC2 instances. The requirement is to capture the IP in instance logs.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Related practice questions
Related SOA-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A company uses Amazon CloudFront to deliver content to a global audience. The origin is an Application Load Balancer in us-east-1. The SysOps administrator wants to reduce costs by minimizing the number of requests that reach the origin server. Which action should the administrator take?
Question 2
A company runs a batch processing application on Amazon EC2 that runs for 2 hours every night. The workload can tolerate interruptions. Which EC2 purchasing option provides the lowest cost for this use case?
Question 3
A SysOps administrator needs to monitor the CPU utilization of an Amazon RDS DB instance and receive an alarm when CPU utilization exceeds 80% for 5 consecutive minutes. Which AWS service should be used to create this alarm?
Question 4
A company runs a critical web application on Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer (ALB). The application uses session stickiness (sticky sessions) to maintain user sessions. The SysOps administrator notices that when instances are replaced during a scale-in or failure event, users lose their session data. The administrator needs to preserve session data across instance failures without losing stickiness benefits. What should the administrator do?
Question 5
A company runs a production web application on a single Amazon EC2 instance. The application experiences a predictable and steady workload 24/7. The SysOps administrator wants to minimize compute costs for this instance while ensuring it remains available during the expected workload. Which EC2 purchasing option should the administrator use?
Question 6
A company has a VPC with public and private subnets. The private subnets host application servers that need to make outbound HTTPS connections to the internet. The SysOps administrator must implement a solution that provides outbound internet connectivity while preventing inbound connections from the internet. Additionally, the solution must allow the company to control which domains the application servers can access. Which solution should the administrator implement?
FAQ
Questions learners often ask
What does this SOA-C02 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Enable the X-Forwarded-For header on the ALB. — When an ALB terminates TLS, it adds the X-Forwarded-For header with the original client IP address. The backend instances can read this header to log the real client IP. Proxy Protocol v2 is used with Network Load Balancer, not ALB. ALB access logs contain client IP but are not stored on the instances. Stickiness is for session persistence.
What should I do if I get this SOA-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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