Question 297 of 1,000
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SSCP Access Control List (ACL) Practice Question

This SSCP practice question tests your understanding of access control list (acl). 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. A key principle to apply: access Control List (ACL). 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 is implementing a new file-sharing application for employees. Which of the following is the most important security control to prevent unauthorized access to shared files?

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

Implement access control lists (ACLs) on shared folders.

The most important control to prevent unauthorized access to shared files is implementing access control lists (ACLs), which explicitly define who can access resources and what permissions they have. Encryption (E) protects data at rest but does not manage permissions; audit logging (D) is detective, not preventive; antivirus (C) prevents malware but does not control access; backups (A) ensure availability, not confidentiality. Therefore, B is correct.

Key principle: Access Control List (ACL)

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • Schedule regular backups.

    Why it's wrong here

    Backups ensure availability but do not control access.

  • Implement access control lists (ACLs) on shared folders.

    Why this is correct

    ACLs enforce permissions, restricting access only to authorized users.

    Related concept

    Access Control List (ACL)

  • Install antivirus software on all endpoints.

    Why it's wrong here

    Antivirus protects against malware, not unauthorized access.

  • Enable detailed audit logging.

    Why it's wrong here

    Logging helps detect incidents but does not prevent unauthorized access.

  • Encrypt files with AES-256.

    Why it's wrong here

    Encryption protects data if stolen, but does not prevent authorized users from sharing.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Detailed technical explanation

How to think about this question

Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.

KKey Concepts to Remember

  • Access Control List (ACL)
  • Principle of Least Privilege

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Access Control List (ACL)

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.

Visual reference

Source Router + ACL permit 10.0.0.0/8 deny any Server 10.0.0.5 ✓ 192.168.1.1 ✗ dropped ACLs evaluate top-down; first match wins — implicit deny all at end

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FAQ

Questions learners often ask

What does this SSCP question test?

Access Control List (ACL)

What is the correct answer to this question?

The correct answer is: Implement access control lists (ACLs) on shared folders. — The most important control to prevent unauthorized access to shared files is implementing access control lists (ACLs), which explicitly define who can access resources and what permissions they have. Encryption (E) protects data at rest but does not manage permissions; audit logging (D) is detective, not preventive; antivirus (C) prevents malware but does not control access; backups (A) ensure availability, not confidentiality. Therefore, B is correct.

What should I do if I get this SSCP question wrong?

Review access Control List (ACL), then practise related SSCP questions on the same topic to reinforce the concept.

What is the key concept behind this question?

Access Control List (ACL)

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Last reviewed: Jun 24, 2026

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This SSCP 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 SSCP exam.