The correct answer is that the employee did not enable encryption, such as BitLocker To Go, after formatting the USB drive. This is because formatting a removable drive only prepares the file system for data storage; it does not automatically apply encryption. BitLocker To Go, the native Windows tool for removable media encryption, must be explicitly turned on by the user—typically by right-clicking the drive in File Explorer and selecting "Turn on BitLocker" or via the Control Panel. On the CISSP exam, this scenario tests your understanding of the operational gap between policy and user behavior, emphasizing that encryption is not a default state for formatted media. A common trap is assuming that formatting or using a corporate image automatically enforces encryption, but the exam expects you to recognize that encryption is a separate, deliberate action. Memory tip: "Format clears the slate; encryption locks the gate."
CISSP Security Operations Practice Question
This CISSP practice question tests your understanding of security operations. 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.
A company's security policy requires that all removable media be encrypted. An employee plugs in a USB drive and is prompted to format it before use. After formatting, the drive is not encrypted. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The employee did not enable encryption (e.g., BitLocker To Go) after formatting
Option A is correct because BitLocker To Go, the native encryption feature for removable drives in Windows, is not automatically enabled when a USB drive is formatted. The employee must explicitly enable encryption (e.g., via BitLocker To Go in Control Panel or by right-clicking the drive and selecting 'Turn on BitLocker') after formatting. Without this step, the drive remains unencrypted, violating the security policy.
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.
✓
The employee did not enable encryption (e.g., BitLocker To Go) after formatting
Why this is correct
Encryption is a separate step that must be explicitly enabled, e.g., via BitLocker To Go.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The USB drive hardware does not support encryption
Why it's wrong here
Encryption can be implemented in software regardless of hardware support.
✗
The operating system does not support encryption of removable media
Why it's wrong here
Most modern OSes support encryption of removable media.
✗
The employee used the wrong file system (FAT32 vs NTFS)
Why it's wrong here
File system choice does not provide encryption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume formatting a drive automatically applies encryption (e.g., thinking BitLocker is enabled by default), when in fact encryption must be explicitly activated after formatting.
Detailed technical explanation
How to think about this question
BitLocker To Go uses AES encryption (128-bit or 256-bit) and stores the encryption key in a hidden volume on the drive, protected by a password, smart card, or recovery key. A subtle behavior is that if the drive is formatted as FAT32, BitLocker To Go creates a secondary NTFS partition for the encrypted data, ensuring compatibility with non-Windows systems for read-only access. In real-world scenarios, organizations often deploy Group Policy to enforce automatic BitLocker To Go encryption on removable media, but without such policy, the user must manually enable it.
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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CISSP question in full detail.
Security Operations — This question tests Security Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The employee did not enable encryption (e.g., BitLocker To Go) after formatting — Option A is correct because BitLocker To Go, the native encryption feature for removable drives in Windows, is not automatically enabled when a USB drive is formatted. The employee must explicitly enable encryption (e.g., via BitLocker To Go in Control Panel or by right-clicking the drive and selecting 'Turn on BitLocker') after formatting. Without this step, the drive remains unencrypted, violating the security policy.
What should I do if I get this CISSP 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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