- A
Create a dedicated S3 bucket in the management account, enable S3 default encryption, and configure service delivery for each account.
Why wrong: Default encryption alone does not enforce cross-account access; a bucket policy is needed.
- B
Create a dedicated S3 bucket in the security account with a bucket policy that grants write access to the logging services of all accounts and enforces encryption in transit and at rest.
This approach uses a centralized bucket with proper cross-account bucket policy and encryption, ensuring secure and auditable logging.
- C
Configure each account to deliver logs to the same S3 bucket used for other data.
Why wrong: Using a shared bucket for other data violates the principle of least privilege and complicates access control.
- D
Create an S3 bucket in each account and use S3 replication to copy logs to a central bucket.
Why wrong: This approach duplicates storage and does not centralize logs in real time.
Quick Answer
The answer is to create a dedicated S3 bucket in the security account with a bucket policy that grants write access to the logging services of all accounts and enforces encryption in transit and at rest. This design is the most secure because it follows the principle of least privilege by isolating logs in a single-purpose bucket, while the explicit bucket policy controls cross-account access and mandates both server-side encryption (SSE-S3 or SSE-KMS) and TLS for data in transit, preventing unauthorized reads or accidental exposure. On the AWS Certified Security Specialty SCS-C02 exam, this scenario tests your understanding of centralized logging bucket design and common misconfigurations—the trap is assuming default encryption alone suffices, but the bucket policy must explicitly grant permissions to each source account’s logging service principal. Remember the memory tip: “Policy first, encryption enforced” to ensure both access control and data protection are explicitly defined.
SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. 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 uses AWS Organizations with multiple accounts. The security team wants to centralize security logs (CloudTrail, VPC Flow Logs, AWS Config) from all accounts into a single S3 bucket for analysis. What is the MOST secure way to set up this centralized logging?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Create a dedicated S3 bucket in the security account with a bucket policy that grants write access to the logging services of all accounts and enforces encryption in transit and at rest.
Option D is correct because using a centralized S3 bucket with a bucket policy that grants cross-account access and enforces encryption is secure and auditable. Option A is wrong because using the same bucket used for other purposes may break the principle of least privilege and increase risk. Option B is wrong because creating individual buckets for each account defeats centralization. Option C is wrong because enabling S3 default encryption on a bucket that already receives logs via cross-account policies is not sufficient; the bucket policy must explicitly grant permissions.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a dedicated S3 bucket in the management account, enable S3 default encryption, and configure service delivery for each account.
Why it's wrong here
Default encryption alone does not enforce cross-account access; a bucket policy is needed.
- ✓
Create a dedicated S3 bucket in the security account with a bucket policy that grants write access to the logging services of all accounts and enforces encryption in transit and at rest.
Why this is correct
This approach uses a centralized bucket with proper cross-account bucket policy and encryption, ensuring secure and auditable logging.
Related concept
Authentication checks who the user is.
- ✗
Configure each account to deliver logs to the same S3 bucket used for other data.
Why it's wrong here
Using a shared bucket for other data violates the principle of least privilege and complicates access control.
- ✗
Create an S3 bucket in each account and use S3 replication to copy logs to a central bucket.
Why it's wrong here
This approach duplicates storage and does not centralize logs in real time.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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 Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SCS-C02 questions on access control and AAA configuration.
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Security Logging and Monitoring — study guide chapter
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FAQ
Questions learners often ask
What does this SCS-C02 question test?
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Create a dedicated S3 bucket in the security account with a bucket policy that grants write access to the logging services of all accounts and enforces encryption in transit and at rest. — Option D is correct because using a centralized S3 bucket with a bucket policy that grants cross-account access and enforces encryption is secure and auditable. Option A is wrong because using the same bucket used for other purposes may break the principle of least privilege and increase risk. Option B is wrong because creating individual buckets for each account defeats centralization. Option C is wrong because enabling S3 default encryption on a bucket that already receives logs via cross-account policies is not sufficient; the bucket policy must explicitly grant permissions.
What should I do if I get this SCS-C02 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SCS-C02 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jun 20, 2026
This SCS-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SCS-C02 exam.
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