What is the function of a network intrusion detection system (IDS)? MCQ with Answer and Explanation

What is the function of a network intrusion detection system (IDS)?
A. To monitor network traffic for suspicious activity and alert administrators
B. To prevent all unauthorized access
C. To provide backup services
D. To encrypt all data on the network
Answer: Option A
Solution (By JKSSB Mock Tests)
An IDS monitors network traffic for malicious activities or policy violations and generates alerts to notify administrators.

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Practice More Cyber Security Questions

Question #1
What technique involves an attacker manipulating or modifying the source IP address headers of data packets to disguise their true digital identity and spoof a trusted network node?
A. Cross-Site Execution
B. Man-in-the-Middle
C. IP Spoofing
D. SQL Tampering

Correct Answer: Option C


Explanation:
IP spoofing masks packet origins by replacing real source headers with fake addresses to bypass firewall restrictions or gain unauthorized network access.

This question belongs to: Computer Cyber Security
Question #2
What type of hacker identifies security vulnerabilities in systems without permission, but instead of exploiting them, publicly posts the flaws online to force the vendor to patch them?
A. White Hat Hacker
B. Script Kiddie
C. Black Hat Hacker
D. Grey Hat Hacker

Correct Answer: Option D


Explanation:
Grey hat hackers compromise security perimeters without prior authorization, but generally lack malicious intent, aiming instead to expose vulnerabilities or force technical remediation.

This question belongs to: Computer Cyber Security
Question #3
Which of the following is a common method to secure a Wi-Fi network?
A. Disabling encryption
B. Using an open network
C. Disabling SSID broadcast
D. Sharing the password publicly

Correct Answer: Option C


Explanation:
Disabling SSID broadcast is a security measure that hides the network name, making it less visible to casual attackers.

This question belongs to: Computer Cyber Security