CCSP Cloud Data Security Practice Question
A company uses a cloud object storage service to host a public website. The website content is static and needs to be accessible to anyone on the internet, but the company wants to prevent direct listing of the bucket contents. Which combination of access controls should be configured?
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
✓
Bucket ACLs set to public and block public access disabled
Setting bucket ACLs to public and disabling block public access allows anonymous read access to objects. However, to prevent listing of bucket contents, the ACL must grant only object-level read (GetObject) and not bucket-level list (ListBucket). In cloud storage services like AWS S3, a bucket ACL with READ grants list access, so a bucket policy is typically used instead. In this scenario, with the given options, C is the only choice that enables public access while attempting to prevent listing, though it may not fully achieve it in all providers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
IAM policies granting public access to the bucket
Why it's wrong here
IAM policies cannot grant public access; they are attached to IAM users or roles, not anonymous users.
- ✗
Enable versioning and cross-region replication
Why it's wrong here
Versioning and cross-region replication are for data protection and disaster recovery, not for access control.
- ✓
Bucket ACLs set to public and block public access disabled
Why this is correct
Correct. Bucket ACLs set to public allow public read access to objects. Disabling block public access enables this. However, preventing listing may require additional configuration such as a bucket policy that denies ListBucket.
- ✗
Block public access to the bucket and use pre-signed URLs for objects
Why it's wrong here
Blocking public access and using pre-signed URLs is not feasible for a public website because pre-signed URLs require authentication and expire, making them unsuitable for anonymous access to static content.
Visual reference
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CCSP practice question is part of Courseiva's free ISC2 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 CCSP exam.