What is the role of a network firewall? MCQ with Answer and Explanation

What is the role of a network firewall?
A. To provide backup services
B. To block unauthorized access while permitting authorized communications
C. To detect and remove viruses
D. To increase network speed
Answer: Option B
Solution (By JKExamLibrary)
A network firewall controls incoming and outgoing network traffic based on security rules, allowing authorized traffic and blocking unauthorized access.

This question belongs to: Computer Cyber Security

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Question #1 Report Error
What is the purpose of a VPN (Virtual Private Network)?
A. To detect viruses
B. To increase internet speed
C. To create a secure, encrypted connection over a less secure network
D. To block all incoming traffic

Correct Answer: Option C


Explanation:
A VPN extends a private network across a public network, allowing users to send and receive data as if they were directly connected to the private network, with encryption for security.

This question belongs to: Computer Cyber Security
Question #2 Report Error
Which specific sub-type of social engineering attack targets high-profile corporate decision-makers like CFOs or CEOs to steal sensitive institutional records?
A. Vishing Routine
B. Spam Blasting
C. Whaling Attack
D. Smishing Campaign

Correct Answer: Option C


Explanation:
Whaling is a highly specialized phishing variant designed to target C-suite executives and high-value corporate decision makers.

This question belongs to: Computer Cyber Security
Question #3 Report Error
Which of the following is a type of malware that displays unwanted advertisements?
A. Trojan
B. Adware
C. Spyware
D. Ransomware

Correct Answer: Option B


Explanation:
Adware is a type of malware that automatically displays or downloads unwanted advertisements, often without the user's consent.

This question belongs to: Computer Cyber Security