The answer is Amazon S3 with a centralized bucket and appropriate bucket policies, along with CloudWatch Logs using cross-account subscriptions. These two services work together to form a robust centralized logging solution across accounts: CloudWatch Logs can stream log data from multiple source accounts into a single monitoring account via subscription filters, while Amazon S3 acts as a durable, cost-effective central repository for storing CloudTrail logs, VPC Flow Logs, and other compliance data, secured by resource-based bucket policies that grant cross-account write access. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of log aggregation patterns and IAM policy design for multi-account architectures—a common trap is confusing Kinesis Data Streams (a real-time ingestion layer, not a storage destination) or SQS (a message queue) with the actual log storage service. Remember the memory tip: “Stream to CloudWatch, store in S3” to keep the roles of ingestion and storage distinct.
SAP-C02 Practice Question: Design Solutions for Organizational Complexity
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which TWO AWS services can be used to implement a centralized logging solution across multiple AWS accounts?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon CloudWatch Logs with cross-account log groups.
Options A and D are correct. Option A: CloudWatch Logs can aggregate logs from multiple accounts using cross-account subscriptions. Option D: Amazon S3 can serve as a central log destination for CloudTrail and other logs. Option B is wrong because Kinesis is for streaming, not central log storage. Option C is wrong because CloudFormation is for infrastructure as code. Option E is wrong because SQS is for messaging.
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.
✓
Amazon CloudWatch Logs with cross-account log groups.
Why this is correct
CloudWatch Logs can aggregate logs from multiple accounts.
Related concept
Static NAT maps one inside address to one outside address.
✗
Amazon SQS.
Why it's wrong here
SQS is a message queue service.
✓
Amazon S3 with a centralized bucket and appropriate bucket policies.
Why this is correct
S3 can store logs from multiple accounts.
Related concept
Static NAT maps one inside address to one outside address.
✗
AWS CloudFormation.
Why it's wrong here
CloudFormation is for provisioning resources.
✗
Amazon Kinesis Data Firehose.
Why it's wrong here
Kinesis is for streaming data, not central log storage.
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: Amazon CloudWatch Logs with cross-account log groups. — Options A and D are correct. Option A: CloudWatch Logs can aggregate logs from multiple accounts using cross-account subscriptions. Option D: Amazon S3 can serve as a central log destination for CloudTrail and other logs. Option B is wrong because Kinesis is for streaming, not central log storage. Option C is wrong because CloudFormation is for infrastructure as code. Option E is wrong because SQS is for messaging.
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.
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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