The answer is the exact date and time of each execution, along with the run count and last run time. This is correct because prefetch files with the .pf extension store metadata about application launches, including the full path to the executable, how many times it has run, and the precise timestamp of its most recent execution, as well as a list of loaded DLLs. On the Computer Hacking Forensic Investigator CHFI exam, this concept tests your ability to build a forensic timeline from Windows artifacts, often appearing in scenario-based questions where you must distinguish prefetch data from other artifacts like jump lists or registry MRUs. A common trap is confusing the last run time with the file creation timestamp—prefetch records the last execution, not the first. Memory tip: think “PF = Path, Frequency, and Final run time” to recall the three key data points.
CHFI OS and Network Forensics Practice Question
This CHFI practice question tests your understanding of os and network forensics. 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 Windows forensic investigation, an analyst finds prefetch files with the .pf extension. Which TWO pieces of information can the analyst obtain from analyzing prefetch files?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The number of times the application has been executed
Prefetch files contain metadata about application execution including the full path to the executable, run count, and last run time. They can also list DLLs loaded. The run count and last run time are useful for forensic timeline.
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.
✓
The number of times the application has been executed
Why this is correct
Prefetch stores a run counter.
Related concept
Static NAT maps one inside address to one outside address.
✓
The exact date and time of each execution
Why this is correct
Prefetch records the last execution time; multiple times can be approximated via timestamps.
Related concept
Static NAT maps one inside address to one outside address.
✗
The username that executed the application
Why it's wrong here
Prefetch does not store user context.
✗
The command-line arguments used to launch the program
Why it's wrong here
Command-line arguments are not stored in prefetch; they may be in other artifacts like Jump Lists.
✗
The IP addresses the application connected to
Why it's wrong here
Prefetch does not contain network information.
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
Command-line arguments are not stored in prefetch; they may be in other artifacts like Jump Lists.
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.
OS and Network Forensics — This question tests OS and Network Forensics — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The number of times the application has been executed — Prefetch files contain metadata about application execution including the full path to the executable, run count, and last run time. They can also list DLLs loaded. The run count and last run time are useful for forensic timeline.
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.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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