ISC2 CC Network Security Practice Question
Which security control would best mitigate the risk of network sniffing on a wired LAN segment?
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
✓
Using encryption protocols (e.g., IPsec, TLS)
Encrypting traffic (e.g., using HTTPS, VPN) makes sniffed data unreadable.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Using encryption protocols (e.g., IPsec, TLS)
Why this is correct
Correct. Encryption renders sniffed data confidential.
- ✗
Implementing VLANs
Why it's wrong here
VLANs segment traffic but do not encrypt it.
- ✗
Disabling unused ports on the switch
Why it's wrong here
Reduces physical access but does not protect against sniffing on active ports.
- ✗
Deploying an intrusion detection system
Why it's wrong here
IDS can detect sniffing but does not prevent it.
Go deeper
Related to this question
Learn chapter
Introduction to Security Principles
Key term
Risk
Risk is the possibility that an event or action will negatively affect an organization's ability to achieve its goals, often measured in terms of likelihood and impact.
Key term
VPN
A VPN (Virtual Private Network) creates a secure, encrypted tunnel between your device and a remote server, protecting your data and hiding your online activity.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CC practice question is part of Courseiva's free ISC2 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 CC exam.