FC0-U71 Security Practice Question
What is the primary purpose of a network firewall?
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
✓
To block unauthorized network traffic based on rules
A network firewall filters incoming and outgoing traffic based on a set of rules, typically by port and protocol, to block unauthorized access while allowing legitimate communication.
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 prevent malware infections by scanning files
Why it's wrong here
Antivirus software scans files; firewalls filter traffic.
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To encrypt data transmitted over the network
Why it's wrong here
Encryption is done by VPNs or HTTPS.
- ✓
To block unauthorized network traffic based on rules
Why this is correct
Correct. Firewalls filter traffic to block unauthorized access.
- ✗
To provide wireless network access
Why it's wrong here
Wireless access is provided by access points.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 practice question is part of Courseiva's free CompTIA 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 FC0-U71 exam.