CPENT Network And Perimeter Exploitation Practice Question
A penetration tester is performing a network assessment against a target running an advanced Intrusion Prevention System (IPS). To evade signature-based detection that looks for standard Nmap probe payloads, which Nmap option allows the user to append random junk data to generated packets?
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
✓
--data-length
The --data-length option tells Nmap to append a random number of bytes to the sent packets, altering their length signature and evading simple signature-based Nmap detection rules.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
--mtu
Why it's wrong here
--mtu sets a custom maximum transmission unit to force packet fragmentation.
- ✗
--badsum
Why it's wrong here
--badsum sends packets with a bogus TCP/UDP checksum to detect misconfigured firewalls.
- ✓
--data-length
Why this is correct
--data-length appends random data to packets, altering packet sizes to bypass signature rules.
- ✗
-f
Why it's wrong here
-f fragments the IP packets directly.
About these practice questions
One of 276 original CPENT practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official EC-Council exam blueprint
This CPENT 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 CPENT exam.