- A
Enabling bucket versioning
Why wrong: Versioning helps with data recovery, not access control.
- B
Enabling 'Block all public access' settings
Blocking public access prevents unintended exposure.
- C
Enabling server-side encryption
Why wrong: Encryption protects data at rest but does not control access.
- D
Requiring IAM authentication for all access
IAM ensures only authenticated users with permissions can access.
- E
Setting bucket ACLs to 'private'
Private ACLs restrict access to authorized users only.
Question 31 of 1,000
CCSP Cloud Application Security Practice Question
This CCSP practice question tests your understanding of cloud application security. 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 THREE of the following are effective measures to prevent unauthorized access to cloud storage buckets? (Select THREE)
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
✓
Enabling 'Block all public access' settings
Private ACLs (or bucket policy denying public access), enabling block public access settings, and requiring IAM authentication limit access to authorized entities. Versioning and encryption help with data protection but don't prevent unauthorized access.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enabling bucket versioning
Why it's wrong here
Versioning helps with data recovery, not access control.
- ✓
Enabling 'Block all public access' settings
Why this is correct
Blocking public access prevents unintended exposure.
Related concept
Standard ACLs match source addresses.
- ✗
Enabling server-side encryption
Why it's wrong here
Encryption protects data at rest but does not control access.
- ✓
Requiring IAM authentication for all access
Why this is correct
IAM ensures only authenticated users with permissions can access.
Related concept
Standard ACLs match source addresses.
- ✓
Setting bucket ACLs to 'private'
Why this is correct
Private ACLs restrict access to authorized users only.
Related concept
Standard ACLs match source addresses.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related CCSP ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this CCSP question test?
Cloud Application Security — This question tests Cloud Application Security — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Enabling 'Block all public access' settings — Private ACLs (or bucket policy denying public access), enabling block public access settings, and requiring IAM authentication limit access to authorized entities. Versioning and encryption help with data protection but don't prevent unauthorized access.
What should I do if I get this CCSP question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related CCSP ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jul 4, 2026
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.
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