The answer is that each member account must individually configure the S3 bucket as a publishing destination for its own findings. This is because AWS GuardDuty operates with a delegated administrator model where the management account can centrally enable the service and manage member accounts, but the actual forwarding of findings to an external S3 bucket is a per-account action. Even with a correct bucket policy allowing the GuardDuty service principal, the management account cannot automatically push findings from member accounts; each member must explicitly set the S3 bucket as a publishing destination in its own GuardDuty console or API. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of GuardDuty’s cross-account architecture and the distinction between centralized administration and decentralized data export. A common trap is assuming that enabling GuardDuty in the management account automatically aggregates all findings to a central bucket. Memory tip: Think of it like a shared mailbox—the admin can see who has mail, but each person must individually forward their own letters to the central filing cabinet.
SAP-C02 Practice Question: Design Solutions for Organizational Complexity
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. 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 has a centralized AWS account for security tools and multiple member accounts. They want to use AWS GuardDuty to detect threats across all accounts. They have enabled GuardDuty in the management account and invited all member accounts. GuardDuty is set to send findings to a central S3 bucket in the security account. However, findings from member accounts are not appearing in the central S3 bucket. The security account has a bucket policy that allows the GuardDuty service principal to write findings. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Each member account must individually configure the S3 bucket as a publishing destination for its own findings.
Option D is correct because for GuardDuty to send findings to a central S3 bucket, each member account must configure the publishing destination as well. Simply enabling GuardDuty in the management account does not automatically forward findings from member accounts to a central bucket. Option A is wrong because the bucket policy is already in place. Option B is wrong because GuardDuty supports cross-account. Option C is wrong because there is no such setting.
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.
✗
The GuardDuty detector in the management account is not configured to publish findings to S3.
Why it's wrong here
The management account can publish its own findings, but member accounts need separate configuration.
✗
GuardDuty cannot send findings from member accounts to a central S3 bucket; it only supports CloudWatch Events.
Why it's wrong here
GuardDuty can publish to S3.
✗
The S3 bucket policy does not grant the GuardDuty service principal from member accounts write access.
Why it's wrong here
The bucket policy likely includes the service principal.
✓
Each member account must individually configure the S3 bucket as a publishing destination for its own findings.
Why this is correct
Each account must set up its own publishing destination.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 SAP-C02 NAT questions on configuration and troubleshooting.
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Each member account must individually configure the S3 bucket as a publishing destination for its own findings. — Option D is correct because for GuardDuty to send findings to a central S3 bucket, each member account must configure the publishing destination as well. Simply enabling GuardDuty in the management account does not automatically forward findings from member accounts to a central bucket. Option A is wrong because the bucket policy is already in place. Option B is wrong because GuardDuty supports cross-account. Option C is wrong because there is no such setting.
What should I do if I get this SAP-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 SAP-C02 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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