The answer is a combination of Amazon CloudWatch Logs subscription filters, a Kinesis Data Stream, and Kinesis Data Firehose writing to Amazon S3. This solution is correct because CloudWatch Logs subscription filters in each source account can stream log data directly to a cross-account Kinesis Data Stream in the central logging account, providing near real-time delivery while the stream buffers data for resilience. The Kinesis Data Firehose then reliably writes the streamed data to S3, creating a serverless, fully managed pipeline that withstands Regional failures by using a cross-Region stream or replicating the S3 bucket. On the SAP-C02 exam, this scenario tests your understanding of building a resilient, centralized logging architecture across multiple accounts, with a common trap being to choose S3 replication (which is not near real-time) or a Lambda-based solution (which adds complexity and single points of failure). Remember the memory tip: “Stream to the stream, then Firehose to the bucket” — this pipeline keeps logs flowing fast and fault-tolerant.
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.
A company wants to implement a centralized logging solution for its multi-account AWS environment. The solution must be resilient to AWS Regional failures and provide near real-time log delivery. Which combination of services should the company use?
S3 buckets in each account with cross-region replication enabled to a central bucket.
Why wrong: S3 replication is not near real-time and has latency.
B
Lambda functions in each account that read CloudWatch Logs and write to a central S3 bucket.
Why wrong: Lambda may introduce scaling issues and increased complexity.
C
Amazon CloudWatch Logs subscription filters in each account that stream log data to a Kinesis Data Stream in the central logging account, then use Kinesis Data Firehose to write to S3.
This provides near real-time streaming and cross-account aggregation.
D
Amazon Kinesis Data Firehose delivery streams in each account sending logs to a centralized S3 bucket.
Why wrong: Firehose per account increases complexity and cost.
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 subscription filters in each account that stream log data to a Kinesis Data Stream in the central logging account, then use Kinesis Data Firehose to write to S3.
Option B is correct because CloudWatch Logs can stream to a cross-account Kinesis stream in the logging account, which can then be processed and stored in S3. Option A is not serverless; Option C uses S3 replication which is not near real-time; Option D uses Lambda which is more complex and less resilient.
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.
✗
S3 buckets in each account with cross-region replication enabled to a central bucket.
Why it's wrong here
S3 replication is not near real-time and has latency.
✗
Lambda functions in each account that read CloudWatch Logs and write to a central S3 bucket.
Why it's wrong here
Lambda may introduce scaling issues and increased complexity.
✓
Amazon CloudWatch Logs subscription filters in each account that stream log data to a Kinesis Data Stream in the central logging account, then use Kinesis Data Firehose to write to S3.
Why this is correct
This provides near real-time streaming and cross-account aggregation.
Related concept
Static NAT maps one inside address to one outside address.
✗
Amazon Kinesis Data Firehose delivery streams in each account sending logs to a centralized S3 bucket.
Why it's wrong here
Firehose per account increases complexity and cost.
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 subscription filters in each account that stream log data to a Kinesis Data Stream in the central logging account, then use Kinesis Data Firehose to write to S3. — Option B is correct because CloudWatch Logs can stream to a cross-account Kinesis stream in the logging account, which can then be processed and stored in S3. Option A is not serverless; Option C uses S3 replication which is not near real-time; Option D uses Lambda which is more complex and less resilient.
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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