The answer is to force a client to reconnect and capture the WPA/WPA2 handshake. This works because sending deauthentication packets disconnects a client from the access point; when the client automatically reconnects, the four-way handshake is exchanged again, and airodump-ng can capture it for offline password cracking. On the CEH exam, this scenario tests your understanding of wireless attack phases—specifically how deauthentication attacks serve as a prerequisite for handshake capture, not as a denial-of-service end in themselves. A common trap is confusing the deauth flood’s purpose with simply disrupting connectivity, but the primary goal is always to obtain the encrypted handshake material. Remember the memory tip: “Deauth to reauth, then crack the path”—the attack forces a fresh handshake, which is the key to cracking the PSK.
CEH Practice Question: Advanced Topics: Wireless, Cloud, IoT, Cryptography
This CEH practice question tests your understanding of advanced topics: wireless, cloud, iot, cryptography. 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 wireless penetration test, the tester runs `airodump-ng wlan0mon` and sees numerous beacon frames from a network. The tester then sends deauthentication packets using `aireplay-ng -0 5 -a <BSSID> wlan0mon`. What is the PRIMARY purpose of this deauthentication attack?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
To force a client to reconnect and capture the WPA/WPA2 handshake
Deauthentication attacks force clients to reconnect, allowing capture of the WPA/WPA2 4-way handshake during reconnection, which is needed for offline cracking.
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.
✗
To crash the access point and cause a denial of service
Why it's wrong here
While deauth causes temporary disconnection, the primary goal in a penetration test is to capture the handshake, not DoS.
✓
To force a client to reconnect and capture the WPA/WPA2 handshake
Why this is correct
Correct: The attack forces reauthentication, enabling capture of the 4-way handshake for cracking.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
To obtain the WPS PIN of the access point
Why it's wrong here
WPS PIN cracking requires different tools like Reaver, not deauthentication.
✗
To perform a rogue AP attack by spoofing the BSSID
Why it's wrong here
Rogue AP attacks involve setting up a fake AP, not sending deauth packets.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CEH question in full detail.
Identify which CEH exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Advanced Topics: Wireless, Cloud, IoT, Cryptography — This question tests Advanced Topics: Wireless, Cloud, IoT, Cryptography — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: To force a client to reconnect and capture the WPA/WPA2 handshake — Deauthentication attacks force clients to reconnect, allowing capture of the WPA/WPA2 4-way handshake during reconnection, which is needed for offline cracking.
What should I do if I get this CEH question wrong?
Identify which CEH exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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