ACL Cheat Sheet 2026

The 30 highest-yield ACL facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What does running `getfacl -R /data` accomplish on a Linux system? → Recursively displays the ACL entries for all files and directories under /data
2. In Access Control Lists, what is the purpose of team-building activities? → To strengthen collaboration, trust, and communication
3. What is a fundamental principle of Incident Response & Recovery in Access Control Lists practice? → Following established standards and best practices
4. What is the importance of staying current with trends in Incident Response & Recovery for Access Control Lists? → It ensures practices remain effective and relevant
5. Which approach best supports quality outcomes in Cryptography & Encryption for Access Control Lists? → Systematic application of evidence-based methods
6. What is the role of a code of conduct in Access Control Lists practice? → It establishes expected behavioral and professional standards
7. Which skill is most important for success in Cloud Security Architecture within Access Control Lists? → Continuous learning and adaptation
8. In Access Control Lists practice, what should a professional do when facing a conflict of interest? → Disclose the conflict and recuse if necessary
9. Which of the following best describes confidentiality in Access Control Lists? → Protecting sensitive information from unauthorized disclosure
10. Which attribute in Active Directory stores the security descriptor (including DACL) that controls access to an object's attributes? → nTSecurityDescriptor
11. In microsegmentation, what is the primary purpose of dividing the network into smaller zones? → To limit lateral movement of attackers within the network
12. Which ACL type provides the most detailed traffic filtering? → Extended ACL
13. Why is proper implementation of ACLs crucial for network security? → Ensures controlled access and minimizes security risks
14. Where should an ACL be applied to ensure security without impacting performance? → Near the source of traffic
15. What is a fundamental principle of Threat Intelligence & Analysis in Access Control Lists practice? → Following established standards and best practices
16. What is the role of documentation in Security Operations & Monitoring for Access Control Lists? → It provides an accurate record for accountability and reference
17. When should risk assessments be updated in Access Control Lists? → Regularly and whenever significant changes occur
18. Which ACL feature helps prevent unauthorized data access? → Time-based ACL
19. Which approach best supports quality outcomes in Cloud Security Architecture for Access Control Lists? → Systematic application of evidence-based methods
20. In Linux extended ACLs, what does a 'default ACL' on a directory do? → Defines permissions applied to new files and subdirectories created within that directory
21. In Active Directory, what is an Access Control Entry (ACE)? → An individual permission rule specifying a trustee and the access rights granted or denied
22. What is the role of documentation in Cloud Security Architecture for Access Control Lists? → It provides an accurate record for accountability and reference
23. In POSIX-based systems, which command displays the Access Control List entries for a file? → getfacl
24. What does informed consent require in Access Control Lists practice? → Full disclosure of relevant information before obtaining agreement
25. In Zero Trust Architecture, what is 'East-West' traffic? → Traffic moving laterally between servers and services within a data center or cloud
26. How does an implicit deny rule function in ACLs? → Blocks all traffic unless explicitly allowed
27. Which of the following is a key component of the Zero Trust 'Five Pillars' model developed by the U.S. Department of Defense (DoD)? → Identity, Devices, Networks, Applications & Workloads, and Data
28. Which metric best measures the effectiveness of microsegmentation in reducing breach impact? → Reduction in lateral movement scope and blast radius of a simulated attack
29. What is the role of documentation in Threat Intelligence & Analysis for Access Control Lists? → It provides an accurate record for accountability and reference
30. What is the function of an implicit deny rule in ACLs? → Blocks all traffic unless explicitly allowed