SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company uses Amazon GuardDuty for threat detection. The security team wants to automatically isolate an EC2 instance that is communicating with a known malicious IP address. Which combination of services should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
GuardDuty -> EventBridge -> Lambda -> modify security group
Option B is correct because GuardDuty findings can be sent to EventBridge, which triggers a Lambda function to modify the security group. Option A is wrong because CloudWatch Alarms do not directly process GuardDuty findings. Option C is wrong because AWS Config is for configuration management. Option D is wrong because Systems Manager is for patch management. Option E is wrong because AWS Shield is for DDoS protection.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
GuardDuty -> AWS Config -> Lambda -> modify security group
Why it's wrong here
AWS Config is not designed to react to GuardDuty findings.
✗
GuardDuty -> CloudWatch Alarm -> Lambda -> modify security group
GuardDuty -> EventBridge -> Lambda -> modify security group
Why this is correct
EventBridge can receive GuardDuty findings and trigger Lambda.
Related concept
Static NAT maps one inside address to one outside address.
✗
GuardDuty -> AWS Shield -> modify security group
Why it's wrong here
Shield is for DDoS protection, not instance isolation.
✗
GuardDuty -> AWS Systems Manager -> modify security group
Why it's wrong here
Systems Manager is not event-driven for GuardDuty.
Common exam traps
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.
Detailed technical explanation
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.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SCS-C02 NAT questions on configuration and troubleshooting.
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: GuardDuty -> EventBridge -> Lambda -> modify security group — Option B is correct because GuardDuty findings can be sent to EventBridge, which triggers a Lambda function to modify the security group. Option A is wrong because CloudWatch Alarms do not directly process GuardDuty findings. Option C is wrong because AWS Config is for configuration management. Option D is wrong because Systems Manager is for patch management. Option E is wrong because AWS Shield is for DDoS protection.
What should I do if I get this SCS-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SCS-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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