ISC2 CC Network Security Practice Question
A company deploys a network security device that can block malicious traffic in real-time by inspecting packet payloads and application data. However, the device occasionally blocks legitimate traffic. Which device 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
✓
IPS
An Intrusion Prevention System (IPS) sits inline and can block traffic based on deep inspection, but may cause false positives that disrupt legitimate communications.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
IPS
Why this is correct
IPS can block, with risk of blocking legitimate traffic.
- ✗
Firewall
Why it's wrong here
Firewalls are less likely to block legitimate traffic if properly configured.
- ✗
WAF
Why it's wrong here
WAF focuses on web traffic, not general network traffic.
- ✗
IDS
Why it's wrong here
IDS is passive and does not block traffic.
Go deeper
Related to this question
Learn chapter
Introduction to Security Principles
Key term
IPS
An Intrusion Prevention System (IPS) is a network security device that monitors traffic in real time and automatically blocks threats before they reach your systems.
Key term
Terminal Access Controller Access Control System Plus
TACACS+ is a network security protocol that separates authentication, authorization, and accounting to control who can access network devices and what they can do.
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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.