hardMultiple SelectObjective-mapped
200-201 Practice Question: Which THREE of the following are common evasion…
Which THREE of the following are common evasion techniques used by attackers?
⚠ Common exam trap
Cisco often tests the distinction between evasion techniques and general security practices; the trap here is that candidates may mistake 'patching vulnerabilities' as an attacker action, when in reality it is a defender's mitigation strategy, not an evasion method.
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
✓
Slow scans
Slow scans are a common evasion technique used by attackers to avoid detection by intrusion detection systems (IDS) and intrusion prevention systems (IPS). By sending packets at a very low rate, often over hours or days, the scan falls below the threshold of time-based detection algorithms that trigger alerts on rapid port sweeps. This technique exploits the fact that many security devices rely on timing heuristics to identify reconnaissance activity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Slow scans
Why this is correct
Correct. Slow scans avoid triggering threshold-based alerts.
- ✓
Fragmentation
Why this is correct
Correct. Fragmentation is a common evasion technique to hide payload from IDS.
- ✗
Using high ports
Why it's wrong here
Incorrect. While attackers may use high ports, it is not an evasion technique per se.
- ✗
Patching vulnerabilities
Why it's wrong here
Incorrect. Patching is a defensive measure, not an attack technique.
- ✓
Encryption
Why this is correct
Correct. Encryption obscures the content of communications.
Go deeper
Related to this question
About these practice questions
One of 979 original 200-201 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 by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-201 practice question is part of Courseiva's free Cisco 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 200-201 exam.