What is the primary purpose of a firewall in a computer network? MCQ with Answer and Explanation

What is the primary purpose of a firewall in a computer network?
A. To monitor and control incoming and outgoing network traffic
B. To provide backup services
C. To encrypt all data on the network
D. To detect and remove viruses
Answer: Option A
Solution (By JKSSB Mock Tests)
A firewall monitors and controls incoming and outgoing network traffic based on predetermined security rules.

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Practice More Cyber Security Questions

Question #1
What type of hacker explicitly operates inside strict legal guidelines, using their offensive computer expertise to locate system vulnerabilities via authorized penetration testing?
A. White Hat Hacker / Ethical Hacker
B. Black Hat Hacker
C. Grey Hat Hacker
D. Script Kiddie

Correct Answer: Option A


Explanation:
White hat hackers use their technical skills legally and ethically to assess security postures, disclose vulnerabilities responsibly, and fortify enterprise defenses.

This question belongs to: Computer Cyber Security
Question #2
Which of the following is a common technique used by hackers to gain unauthorized access?
A. Encrypting data
B. Installing antivirus
C. Using a firewall
D. Social engineering

Correct Answer: Option D


Explanation:
Social engineering is a common technique used by hackers to manipulate individuals into divulging confidential information or performing actions that compromise security.

This question belongs to: Computer Cyber Security
Question #3
Which malicious software strain automatically floods a user’s computer monitor with pop-up marketing window sequences, often slowing system performance and bundling tracker cookies secretly?
A. Adware
B. Rootkit Module
C. Ransomware Core
D. Computer Worm

Correct Answer: Option A


Explanation:
Adware is code optimized to continuously display advertisement matrices on client screens, often bundled with browser add-ons without transparent consent.

This question belongs to: Computer Cyber Security