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SSCP Is a primary function of a firewall? Practice Question
Which of the following is a primary function of a firewall?
⚠ Common exam trap
A common mix-up: candidates confuse a firewall's primary function with ancillary features like VPN termination or intrusion detection, but the SSCP exam emphasizes that filtering traffic based on rules is the fundamental and defining role 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
✓
Filter traffic based on rules
A firewall's primary function is to filter network traffic based on a defined set of security rules, such as source/destination IP addresses, ports, and protocols. It operates at the network layer (or higher) to permit or deny packets, acting as a barrier between trusted and untrusted networks. This rule-based filtering is the core mechanism that enforces access control policies.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Filter traffic based on rules
Why this is correct
Firewalls enforce security policies by filtering packets.
- ✗
Assign IP addresses
Why it's wrong here
IP assignment is done by DHCP.
- ✗
Encrypt network traffic
Why it's wrong here
Firewalls do not typically encrypt traffic.
- ✗
Detect malware on endpoints
Why it's wrong here
Malware detection is not a firewall's primary function.
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One of 920 original SSCP 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 SSCP 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 SSCP exam.