The answer is full-disk encryption, because it is the best control for protecting sensitive customer data on a laptop in the event of theft. Full-disk encryption (FDE) secures data at rest by encoding the entire storage volume, typically with AES-128 or AES-256, so that even if an attacker physically removes the drive, the data remains unreadable without the correct decryption key. On the CompTIA ITF+ FC0-U61 exam, this scenario tests your understanding of confidentiality controls for mobile devices, often contrasting FDE with weaker options like file-level encryption or password-protected screensavers. A common trap is choosing a firewall or antivirus, but those protect against network threats or malware, not physical theft. Remember the mnemonic: “FDE for theft, AV for threats, firewall for nets.”
FC0-U61 Security Practice Question
This FC0-U61 practice question tests your understanding of security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
A small business owner wants to protect sensitive customer data stored on a laptop that is frequently used on public Wi-Fi networks. The owner is considering implementing a security control that ensures data remains confidential even if the laptop is stolen. Which of the following is the BEST control for this scenario?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement full-disk encryption
Full-disk encryption (FDE) protects data at rest by encrypting the entire storage volume, typically using AES-128 or AES-256. Even if the laptop is stolen, the encrypted data remains unreadable without the decryption key, ensuring confidentiality. This directly addresses the requirement for data protection after physical theft.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use a VPN when connected to public Wi-Fi
Why it's wrong here
A VPN encrypts network traffic, not data stored on the device.
✗
Install antivirus software
Why it's wrong here
Antivirus protects against malware but does not ensure data confidentiality if the device is stolen.
✓
Implement full-disk encryption
Why this is correct
Full-disk encryption protects data at rest by encrypting the entire drive, so data is unreadable without the decryption key.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Require a strong password for user login
Why it's wrong here
A strong password prevents unauthorized login but does not encrypt data at rest.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse encryption of data in transit (VPN) with encryption of data at rest (FDE), or assume that a strong password alone is sufficient to protect data after physical theft.
Detailed technical explanation
How to think about this question
Full-disk encryption operates at the block level, encrypting every sector of the drive, including the operating system, swap files, and temporary files. Technologies like BitLocker (using TPM) or FileVault (using hardware encryption) ensure that the decryption key is never stored in plaintext on the drive. In a real-world scenario, even if an attacker removes the SSD and connects it to another machine, the encrypted data appears as random noise without the correct key.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the FC0-U61 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implement full-disk encryption — Full-disk encryption (FDE) protects data at rest by encrypting the entire storage volume, typically using AES-128 or AES-256. Even if the laptop is stolen, the encrypted data remains unreadable without the decryption key, ensuring confidentiality. This directly addresses the requirement for data protection after physical theft.
What should I do if I get this FC0-U61 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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