Quick Answer
The answer is physically inspect the connection between the keyboard and the computer, as this is the only reliable method to detect a hardware keylogger. Unlike software-based keyloggers that run as processes or hook into the OS, a hardware keylogger is a physical inline device inserted between the keyboard cable and the USB or PS/2 port, capturing keystrokes independently of the operating system. This means it cannot be found by antivirus scans, process lists, or event logs, making physical inspection the definitive detection technique. On the Certified Ethical Hacker CEH exam, this question tests your understanding of the distinction between hardware and software attack vectors—a common trap is choosing a software-based detection method like checking running processes. Remember the memory tip: if it’s hardware, you need hands-on eyes; software tools won’t see it.
This CEH practice question tests your understanding of cryptography and malware analysis. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A security analyst suspects that a user's machine is infected with a keylogger. Which of the following is the most effective method to detect a hardware keylogger?
Check running processes for suspicious entries
Why wrong: Hardware keyloggers do not run as processes.
Physically inspect the connection between the keyboard and the computer
Hardware keyloggers are physical devices inserted inline.
Review USB device history in Event Viewer
Why wrong: May show connected devices but not necessarily a keylogger.
Run an antivirus scan
Why wrong: Antivirus typically detects software keyloggers, not hardware.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Physically inspect the connection between the keyboard and the computer
A hardware keylogger is a physical device inserted between the keyboard and the computer, typically at the PS/2 or USB connector. Unlike software-based keyloggers, it operates independently of the operating system, so it cannot be detected by process lists, event logs, or antivirus scans. The only reliable detection method is a physical inspection of the keyboard cable and connection point for any unusual inline devices.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Check running processes for suspicious entries
Why it's wrong here
Hardware keyloggers do not run as processes.
Physically inspect the connection between the keyboard and the computer
Why this is correct
Hardware keyloggers are physical devices inserted inline.
Related concept
Read the scenario before looking for a memorised answer.
Review USB device history in Event Viewer
Why it's wrong here
May show connected devices but not necessarily a keylogger.
Run an antivirus scan
Why it's wrong here
Antivirus typically detects software keyloggers, not hardware.
Common exam traps
The trap here is that candidates assume all keyloggers are software-based and can be detected by OS-level tools, but CEH specifically tests the distinction between hardware and software keyloggers, where physical inspection is the only definitive method for hardware variants.
Trap categories for this question
Command / output trap
May show connected devices but not necessarily a keylogger.
Detailed technical explanation
Hardware keyloggers often use a microcontroller to capture keystrokes and store them in internal flash memory, transmitting data via Bluetooth or Wi-Fi. They are transparent to the host system because they simply pass through the keyboard signals, making them invisible to software-based security tools. In a real-world scenario, a penetration tester might use a hardware keylogger to capture credentials from a locked workstation, bypassing all endpoint protection.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the CEH 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.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cryptography and Malware Analysis — study guide chapter
Learn the concepts, then practise the questions
Cryptography and Malware Analysis practice questions
Targeted practice on this topic area only
All CEH questions
1,010 questions across all exam domains
Certified Ethical Hacker CEH study guide
Full concept coverage aligned to exam objectives
CEH practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise CEH questions linked to Footprinting, Reconnaissance and Scanning.
Practise CEH questions linked to Enumeration and System Hacking.
Practise CEH questions linked to Malware, Social Engineering and Network Attacks.
Practise CEH questions linked to Web Application and Injection Attacks.
Practise CEH questions linked to Introduction to Ethical Hacking.
Practise CEH questions linked to Scanning Networks and Enumeration.
Practise CEH questions linked to Vulnerability Analysis and System Hacking.
Practise CEH questions linked to Advanced Topics: Wireless, Cloud, IoT, Cryptography.
Practise CEH questions linked to Footprinting and Reconnaissance.
Practise CEH questions linked to Network and Web Application Attacks.
Practise CEH questions linked to Wireless, IoT and Cloud Security.
Practise CEH questions linked to Cryptography and Malware Analysis.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Cryptography and Malware Analysis — This question tests Cryptography and Malware Analysis — Read the scenario before looking for a memorised answer..
The correct answer is: Physically inspect the connection between the keyboard and the computer — A hardware keylogger is a physical device inserted between the keyboard and the computer, typically at the PS/2 or USB connector. Unlike software-based keyloggers, it operates independently of the operating system, so it cannot be detected by process lists, event logs, or antivirus scans. The only reliable detection method is a physical inspection of the keyboard cable and connection point for any unusual inline devices.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 11, 2026
This CEH 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 CEH exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.