The correct answer is to analyze the Update Sequence Number (USN) journal for file system activity. This is because the USN journal, a feature of the NTFS file system, maintains a persistent log of every change made to files and directories on a volume, including creations, deletions, renames, and attribute modifications. The `fsutil usn readjournal C:` command dumps this log to a text file, allowing an investigator to reconstruct a timeline of file system events even if the Master File Table (MFT) entries have been altered or overwritten. On the CHFI exam, this question tests your understanding of Windows artifact analysis and the distinction between volatile MFT data and the more persistent USN journal, which is often overlooked by attackers. A common trap is confusing this command with `fsutil usn queryjournal`, which only shows journal metadata, not the actual records. Memory tip: think of the USN journal as a “black box flight recorder” for your hard drive—it logs every file change, even after the fact.
CHFI Storage Forensics and File System Analysis Practice Question
This CHFI practice question tests your understanding of storage forensics and file system analysis. 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.
During a forensic examination of a Windows 10 system, an investigator runs the following command: 'fsutil usn readjournal C: > usn_output.txt'. What is the primary purpose of this action?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
To analyze the Update Sequence Number (USN) journal for file system activity
The USN journal records changes to files and directories. This command reads the journal, which can reveal file creation, deletion, and modification timestamps, even if the MFT entry is modified.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
To recover deleted files from the Recycle Bin
Why it's wrong here
The $Recycle.bin folder contains deleted files, but this command reads the USN journal.
✓
To analyze the Update Sequence Number (USN) journal for file system activity
Why this is correct
The USN journal tracks changes; reading it helps identify file operations.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
To check the integrity of the NTFS file system
Why it's wrong here
The USN journal is not used for integrity checks; chkdsk is used for that.
✗
To extract the Master File Table ($MFT) from the volume
Why it's wrong here
fsutil usn readjournal reads the USN journal, not the $MFT directly.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
The $Recycle.bin folder contains deleted files, but this command reads the USN journal.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
Storage Forensics and File System Analysis — This question tests Storage Forensics and File System Analysis — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: To analyze the Update Sequence Number (USN) journal for file system activity — The USN journal records changes to files and directories. This command reads the journal, which can reveal file creation, deletion, and modification timestamps, even if the MFT entry is modified.
What should I do if I get this CHFI question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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