What is a firewall?
✓ Correct Answer: Option B
A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules, acting as a barrier between trusted and untrusted networks.
📚 About This Computer Science Practice Question
This 2-level Computer Science question from the Computer Security & Viruses topic is part of One Paper Preparation's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free Computer Science practice test or use flashcards for spaced repetition review.