- A
Teardrop attack
The Teardrop attack exploits overlapping IP fragments, matching the description.
- B
Smurf attack
Why wrong: A Smurf attack uses ICMP echo requests with a spoofed source IP to flood a target, not overlapping fragments.
- C
Ping flood
Why wrong: Ping flood is a simple ICMP flood, not fragment-based.
- D
SYN flood
Why wrong: SYN flood exploits the TCP three-way handshake, not IP fragmentation.
Question 210 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.
A security analyst notices that an attacker is sending crafted packets with overlapping IP fragments to a target server, causing the server to crash. Which type of attack is described?
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
✓
Teardrop attack
This is a Teardrop attack, which exploits a vulnerability in the IP fragmentation reassembly process. The attacker sends a series of fragmented IP packets with intentionally overlapping fragment offsets, causing the target system to miscalculate the size of the reassembled packet, leading to a buffer overflow and system crash. This attack specifically targets the IP stack's handling of fragment offset fields in the IP header.
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.
- ✓
Teardrop attack
Why this is correct
The Teardrop attack exploits overlapping IP fragments, matching the description.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Smurf attack
Why it's wrong here
A Smurf attack uses ICMP echo requests with a spoofed source IP to flood a target, not overlapping fragments.
When this WOULD be correct
A Smurf attack would be correct if the question described an attacker sending ICMP echo requests to a network broadcast address with a spoofed source IP, causing all hosts to reply to the victim and overwhelming it with traffic.
- ✗
Ping flood
- ✗
SYN flood
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.
✓Teardrop attackCorrect answer▾
Why this is correct
The Teardrop attack exploits overlapping IP fragments, matching the description.
✗Smurf attackWrong answer — click to see why▾
Why this is wrong here
The Smurf attack involves sending ICMP echo requests with a spoofed source IP to a network's broadcast address, causing amplification and flooding the victim, not using overlapping IP fragments to crash a server.
★ When this WOULD be the correct answer
A Smurf attack would be correct if the question described an attacker sending ICMP echo requests to a network broadcast address with a spoofed source IP, causing all hosts to reply to the victim and overwhelming it with traffic.
Why candidates choose this
Candidates may confuse any attack that causes a denial of service with the Smurf attack, especially if they recall it involves IP-based flooding, but they miss the specific mechanism of overlapping fragments unique to teardrop.
✗Ping floodWrong answer — click to see why▾
Why this is wrong here
A ping flood involves overwhelming a target with ICMP Echo Request packets, not crafted packets with overlapping IP fragments that cause a crash due to reassembly errors.
★ When this WOULD be the correct answer
A ping flood would be correct if the question described an attacker sending a high volume of ICMP Echo Request packets to consume bandwidth or CPU resources, potentially causing denial of service.
Why candidates choose this
Candidates may confuse any network-based DoS attack with a ping flood, as ping is a common tool and the term 'flood' is broadly associated with overwhelming traffic.
✗SYN floodWrong answer — click to see why▾
Why this is wrong here
A SYN flood attack involves sending many TCP SYN requests to exhaust server resources, not sending crafted packets with overlapping IP fragments.
★ When this WOULD be the correct answer
A SYN flood would be correct if the question described an attacker sending a high volume of TCP SYN packets to a server, overwhelming its connection queue and causing denial of service.
Why candidates choose this
Candidates may confuse SYN flood with any attack that causes a server to crash, overlooking the specific mention of overlapping IP fragments which is characteristic of a teardrop attack.
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
CompTIA often tests the distinction between attacks that exploit protocol logic flaws (like Teardrop) versus volumetric or handshake-based attacks, so candidates may confuse Teardrop with a SYN flood because both can cause crashes, but the key difference is that Teardrop targets IP fragmentation, not TCP state exhaustion.
Detailed technical explanation
How to think about this question
The Teardrop attack leverages the IP fragmentation mechanism defined in RFC 791, where each fragment contains a Fragment Offset field (13 bits) indicating where the fragment belongs in the original datagram. By crafting overlapping offsets (e.g., setting the offset of a later fragment to a value that overlaps with the previous fragment's data range), the reassembly routine may attempt to copy data into a buffer beyond its allocated size, causing a crash — this was famously exploited in early Windows and Linux kernels (e.g., WinNuke variant). Modern operating systems have since implemented robust fragment reassembly validation, but the attack remains a classic example of protocol-level exploitation.
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
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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: Teardrop attack — This is a Teardrop attack, which exploits a vulnerability in the IP fragmentation reassembly process. The attacker sends a series of fragmented IP packets with intentionally overlapping fragment offsets, causing the target system to miscalculate the size of the reassembled packet, leading to a buffer overflow and system crash. This attack specifically targets the IP stack's handling of fragment offset fields in the IP header.
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.
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Last reviewed: Jun 30, 2026
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