The answer is to photograph the scene including all visible cables and connections, as this is the most critical action for preserving evidence during a first response to a computer incident. This step is essential because it creates an immutable visual record of the exact physical state of the system—capturing port assignments, device connections, and cable orientations—before any alterations occur, thereby securing the chain of custody and preventing disputes over the original configuration. On the Computer Hacking Forensic Investigator CHFI exam, this concept tests your understanding of the order of volatility and the principle that documentation must precede any data collection or disconnection. A common trap is choosing to immediately disconnect power or image the hard drive, which can destroy critical network topology evidence. Remember the mnemonic “Photo First” to lock in that visual documentation always comes before any other forensic action.
CHFI Computer Forensics Fundamentals and Process Practice Question
This CHFI practice question tests your understanding of computer forensics fundamentals and process. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 the first response to a computer incident, which of the following actions is MOST critical for preserving evidence?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Photograph the scene including all visible cables and connections
Option C is correct because photographing the scene, including all visible cables and connections, is the most critical first step in preserving the chain of custody and documenting the exact physical state of the system before any changes occur. This visual record captures port assignments, device connections, and cable orientations that could be altered by subsequent actions, ensuring that the original configuration is preserved for forensic analysis. Without this documentation, later evidence of network topology or peripheral involvement may be lost or disputed.
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.
✗
Run antivirus software to remove any malware
Why it's wrong here
Running software modifies the system and destroys evidence.
✗
Disconnect the power to prevent data alteration
Why it's wrong here
Disconnecting power may lose volatile data. The rule is 'do not power off unless volatile data is needed'.
✓
Photograph the scene including all visible cables and connections
Why this is correct
This preserves the initial state as evidence.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Immediately boot the system to verify it is operational
Why it's wrong here
Booting modifies the system state and can alter evidence.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that immediately disconnecting power (Option B) is the safest action, but the trap is that this destroys volatile evidence and may cause unintended writes, whereas photographing the scene is the least intrusive and most defensible first step for preserving the physical state of evidence.
Detailed technical explanation
How to think about this question
In digital forensics, the 'first responder' must adhere to the 'Order of Volatility' (RFC 3227), which prioritizes capturing volatile data (e.g., RAM, network connections) before powering down. Photographing the scene is a non-invasive documentation step that captures physical evidence such as USB devices, external drives, and cable connections (e.g., Ethernet, serial, power) that could indicate network paths or attached peripherals. This step is critical because later analysis may rely on knowing whether a device was connected to a specific port (e.g., a forensic write-blocker or a suspect's external drive) to reconstruct the incident timeline.
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 practitioner preparing for the CHFI exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
Computer Forensics Fundamentals and Process — This question tests Computer Forensics Fundamentals and Process — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Photograph the scene including all visible cables and connections — Option C is correct because photographing the scene, including all visible cables and connections, is the most critical first step in preserving the chain of custody and documenting the exact physical state of the system before any changes occur. This visual record captures port assignments, device connections, and cable orientations that could be altered by subsequent actions, ensuring that the original configuration is preserved for forensic analysis. Without this documentation, later evidence of network topology or peripheral involvement may be lost or disputed.
What should I do if I get this CHFI 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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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