- A
Man-in-the-middle
This attack allows the attacker to intercept and alter communications between two parties.
- B
Replay attack
Why wrong: A replay attack involves capturing and retransmitting valid data, not real-time interception.
- C
Smurf attack
Why wrong: A Smurf attack is a DDoS that uses ICMP echo requests to a broadcast address, not interception.
- D
Phishing
Why wrong: Phishing is a social engineering attack, not a network-level interception.
Question 2 of 520
N10-009 Network Security Practice Question
This N10-009 practice question tests your understanding of network security. 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 attack technique involves an attacker intercepting and potentially modifying the communication between two parties without their knowledge?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Man-in-the-middle
A man-in-the-middle (MITM) attack is correct because it specifically involves an attacker secretly intercepting and potentially altering communications between two parties who believe they are directly communicating with each other. This is achieved by the attacker inserting themselves into the communication path, often by ARP spoofing, DNS spoofing, or rogue access points, allowing them to capture, decrypt, or modify packets in transit.
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.
- ✓
Man-in-the-middle
Why this is correct
This attack allows the attacker to intercept and alter communications between two parties.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Replay attack
Why it's wrong here
A replay attack involves capturing and retransmitting valid data, not real-time interception.
When this WOULD be correct
A replay attack would be correct for a question like: 'Which attack involves capturing network traffic and retransmitting it to impersonate a legitimate user or gain unauthorized access?'
- ✗
Smurf attack
Why it's wrong here
A Smurf attack is a DDoS that uses ICMP echo requests to a broadcast address, not interception.
- ✗
Phishing
Why it's wrong here
Phishing is a social engineering attack, not a network-level interception.
When this WOULD be correct
A question asking 'Which attack involves sending fraudulent emails to trick users into revealing credentials?' would have phishing as the correct answer.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The N10-009 exam frequently reuses these exact scenarios with slightly different constraints.
✓Man-in-the-middleCorrect answer▾
Why this is correct
This attack allows the attacker to intercept and alter communications between two parties.
✗Replay attackWrong answer — click to see why▾
Why this is wrong here
A replay attack involves capturing and retransmitting valid data, but it does not inherently intercept or modify live communication between two parties; the attacker typically does not position themselves in the middle of the ongoing session.
★ When this WOULD be the correct answer
A replay attack would be correct for a question like: 'Which attack involves capturing network traffic and retransmitting it to impersonate a legitimate user or gain unauthorized access?'
Why candidates choose this
Candidates may confuse replay attacks with man-in-the-middle because both involve intercepting data, but they overlook that replay attacks focus on reuse rather than real-time modification or interception of the communication channel.
✗PhishingWrong answer — click to see why▾
Why this is wrong here
Phishing is a social engineering attack that tricks users into revealing sensitive information, not an attack that intercepts or modifies communication between two parties.
★ When this WOULD be the correct answer
A question asking 'Which attack involves sending fraudulent emails to trick users into revealing credentials?' would have phishing as the correct answer.
Why candidates choose this
Candidates may confuse phishing with man-in-the-middle because both involve deception, but phishing targets the user directly rather than the communication channel.
Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse a replay attack with a MITM attack because both involve capturing traffic, but a replay attack only retransmits captured data without real-time interception or modification of the ongoing session.
Detailed technical explanation
How to think about this question
In a MITM attack using ARP spoofing, the attacker sends forged ARP replies to map their MAC address to the IP address of the default gateway, causing the victim's traffic to be routed through the attacker's machine. Tools like Ettercap or Bettercap can then perform packet capture and injection, enabling the attacker to modify HTTP responses or downgrade TLS connections. A subtle behavior is that modern protocols like HTTPS with HSTS or certificate pinning can mitigate this, but a MITM can still succeed if the attacker installs a rogue CA certificate on the victim's device.
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 N10-009 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
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this N10-009 question test?
Network Security — This question tests Network Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Man-in-the-middle — A man-in-the-middle (MITM) attack is correct because it specifically involves an attacker secretly intercepting and potentially altering communications between two parties who believe they are directly communicating with each other. This is achieved by the attacker inserting themselves into the communication path, often by ARP spoofing, DNS spoofing, or rogue access points, allowing them to capture, decrypt, or modify packets in transit.
What should I do if I get this N10-009 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
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 →
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Last reviewed: Jun 11, 2026
This N10-009 practice question is part of Courseiva's free CompTIA 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 N10-009 exam.
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