FC0-U71 Security Practice Question
What is the primary purpose of a 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 prevent unauthorized network access
A firewall controls incoming and outgoing network traffic based on predetermined security rules. It filters traffic by port, protocol, or IP address to block unauthorized access.
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 encrypt data on the hard drive
Why it's wrong here
Encryption is done by disk encryption tools.
- ✗
To detect and remove viruses
Why it's wrong here
That is the role of antivirus software.
- ✓
To prevent unauthorized network access
Why this is correct
Firewalls block unauthorized traffic.
- ✗
To manage user passwords
Why it's wrong here
Password management is separate.
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Same concept, more angles
2 more ways this is tested on FC0-U71
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. What is the primary purpose of a network firewall?
easy- A.To prevent malware infections by scanning files
- B.To encrypt data transmitted over the network
- ✓ C.To block unauthorized network traffic based on rules
- D.To provide wireless network access
Why C: 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.
Variation 2. A company wants to protect its network from unauthorized external access. Which of the following devices should be configured to filter traffic based on port and protocol?
medium- ✓ A.Network firewall
- B.Host-based firewall
- C.VPN concentrator
- D.Antivirus software
Why A: A network firewall examines incoming and outgoing traffic and can block or allow based on rules involving ports and protocols, providing a barrier between internal and external networks.
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.