The answer is implementing file-level permissions so users only have write access to folders they need. This control directly supports ransomware damage reduction by applying the principle of least privilege, which restricts each user’s access to only the specific files and folders required for their job. When a workstation becomes infected, the ransomware can only encrypt files that the user account has write permissions for, rather than the entire shared network drive. On the CompTIA ITF+ FC0-U61 exam, this concept tests your understanding of access control as a core security measure, often appearing in questions about limiting the blast radius of malware. A common trap is confusing data protection (like disk encryption) with access restriction—encryption protects data at rest but does nothing to stop ransomware from encrypting files in real time. Remember the memory tip: “Least privilege limits the loot”—the fewer write permissions a user has, the less damage a single infection can do.
FC0-U61 Security Practice Question
This FC0-U61 practice question tests your understanding of 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.
You are the IT administrator for a small company with 50 employees. The company uses a shared network drive for project files. Employees have read/write access to all folders on the drive. Recently, a ransomware attack encrypted many files on the network drive after an employee's workstation became infected. The employee had mapped the drive as a local letter. Backups are available but restoring takes several hours. Management wants to reduce the risk of future ransomware damage to the network drive. You are considering implementing one of the following controls. Which control would be most effective in limiting the spread of ransomware to the network drive?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement file-level permissions so users only have write access to folders they need.
Option A is correct because implementing file-level permissions with least privilege limits the number of files a ransomware infection can encrypt. Option B is wrong because VPN is for remote access, not internal protection. Option C is wrong because antivirus may not prevent malware from running. Option D is wrong because disk encryption protects data at rest but does not prevent ransomware from encrypting files.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Enable disk encryption on the network drive.
Why it's wrong here
Disk encryption protects data at rest but does not prevent encryption by ransomware.
✓
Implement file-level permissions so users only have write access to folders they need.
Why this is correct
Least privilege reduces the scope of encryption if a workstation is infected.
Related concept
Authentication checks who the user is.
✗
Install antivirus software on all workstations and schedule weekly scans.
Why it's wrong here
Antivirus may not stop all ransomware, especially if it is new.
✗
Require all employees to use a VPN when accessing the network drive.
Why it's wrong here
VPN secures remote access but does not prevent internal infection spread.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related FC0-U61 questions on access control and AAA configuration.
Security — This question tests Security — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Implement file-level permissions so users only have write access to folders they need. — Option A is correct because implementing file-level permissions with least privilege limits the number of files a ransomware infection can encrypt. Option B is wrong because VPN is for remote access, not internal protection. Option C is wrong because antivirus may not prevent malware from running. Option D is wrong because disk encryption protects data at rest but does not prevent ransomware from encrypting files.
What should I do if I get this FC0-U61 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related FC0-U61 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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