Quick Answer
The answer is the log command. This is the correct choice because the macOS unified logging system consolidates all system and application diagnostic messages into a single, high-performance data store, and the log command is the native command-line tool designed specifically to query, stream, and filter these logs. On the Computer Hacking Forensic Investigator CHFI exam, this tests your ability to perform live forensic analysis on macOS systems, as investigators must use the log command to extract evidence of process execution, network connections, or user activity around a specific incident time. A common trap is confusing this with older tools like syslog or dmesg, which do not access the unified log store. Remember the mnemonic: “Unified Log, Unified Tool” — if it’s macOS unified logging, you always reach for the log command.
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 Mac forensic investigation, you examine the unified log for process execution around the time of an incident. Which command-line tool is used to query the macOS unified log?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
log
The 'log' command is used to access the unified log on macOS.
journalctl
Why wrong: journalctl is for systemd-based Linux systems, not macOS.
dmesg
Why wrong: dmesg shows kernel ring buffer, not the unified log.
syslog
Why wrong: syslog is a legacy logging system, not the unified log.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
log
The 'log' command is the native tool to query the unified logging system on macOS.
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
For each option: why learners choose it and why it is or isn't the right answer here.
log
Why this is correct
The 'log' command is used to access the unified log on macOS.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
journalctl
Why it's wrong here
journalctl is for systemd-based Linux systems, not macOS.
dmesg
Why it's wrong here
dmesg shows kernel ring buffer, not the unified log.
syslog
Why it's wrong here
syslog is a legacy logging system, not the unified log.
Common exam traps
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
dmesg shows kernel ring buffer, not the unified log.
Detailed technical explanation
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.
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
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.
What to study next
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.
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FAQ
OS and Network Forensics — This question tests OS and Network Forensics — Static NAT maps one inside address to one outside address..
The correct answer is: log — The 'log' command is the native tool to query the unified logging system on macOS.
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.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
This CHFI practice question is part of Courseiva's free EC-Council certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CHFI exam.
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