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SSCP Access Control List (ACL) Practice Question
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.
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.
- ✗
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.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.