The answer is Alternate Data Streams (ADS) and the $Recycle.bin folder. ADS is a native NTFS feature that allows multiple data streams to be attached to a single file, enabling hidden data to be stored without affecting the file’s visible size or content, making it a classic hiding technique. The $Recycle.bin, while a system-managed hidden folder, can be exploited to stash files out of plain sight, as it is not scanned by default in normal directory listings. On the CHFI exam, this question tests your understanding of NTFS forensic artifacts versus actual hiding mechanisms—common traps include confusing the USN Journal (a change log, not a hiding feature) or the Host Protected Area (a disk-level, not NTFS-specific, feature). Remember: ADS hides data within a file’s shadow, while $Recycle.bin hides files in plain sight. For a quick mnemonic, think “ADS Attaches Data Secretly, and the Bin Buries Files.”
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.
Which TWO of the following are features of the NTFS file system that can be used to hide data? (Select TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
$Recycle.bin
NTFS offers two key features for hiding data: Alternate Data Streams (ADS) allow attaching hidden data to files, and the USN Journal (while not primarily for hiding) can be manipulated to hide changes. However, USN Journal is more of a forensic artifact than a hiding technique. The best answers are ADS and the $Recycle.bin (which can be used to hide files). For this question, focus on ADS and HPA (Host Protected Area) is not NTFS-specific but can be used on NTFS drives. However, HPA is a disk-level feature, not NTFS-specific. The intended correct answers are Alternate Data Streams and the $Recycle.bin (which is a hidden folder).
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Master File Table (MFT)
Why it's wrong here
MFT is a directory of files, not a hiding technique.
✗
Host Protected Area (HPA)
Why it's wrong here
HPA is a disk-level hiding feature, not specific to NTFS.
✓
$Recycle.bin
Why this is correct
The $Recycle.bin folder is hidden and can be used to conceal files, though it's intended for deleted items.
Volume Shadow Copy is a backup feature, not primarily for hiding data.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
OSPF neighbours must agree on key parameters.
Router ID selection can affect neighbour relationships and LSDB output.
OSPF cost influences the preferred path.
A route can appear in OSPF information but not become the installed route.
TExam Day Tips
→Check area mismatch first when OSPF adjacency fails.
→Review passive interfaces when a network is advertised but no neighbour forms.
→Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
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 OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related CHFI OSPF questions on adjacency and route selection.
Storage Forensics and File System Analysis — This question tests Storage Forensics and File System Analysis — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: $Recycle.bin — NTFS offers two key features for hiding data: Alternate Data Streams (ADS) allow attaching hidden data to files, and the USN Journal (while not primarily for hiding) can be manipulated to hide changes. However, USN Journal is more of a forensic artifact than a hiding technique. The best answers are ADS and the $Recycle.bin (which can be used to hide files). For this question, focus on ADS and HPA (Host Protected Area) is not NTFS-specific but can be used on NTFS drives. However, HPA is a disk-level feature, not NTFS-specific. The intended correct answers are Alternate Data Streams and the $Recycle.bin (which is a hidden folder).
What should I do if I get this CHFI question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related CHFI OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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