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๐Ÿ“ Denial of service

๐Ÿ“– From Operating System โ€ข 15. Security โ€ข 14 questions available

Practice MCQs for Denial of service. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

๐Ÿ”„ Last updated: 2026-07-27

3
Easy Questions
7
Medium Questions
4
Hard Questions

๐Ÿ“ Sample Questions

Q1. What is masquerading in network security?

๐Ÿ”น A. Pretending to be another host or user
๐Ÿ”น B. Intercepting traffic without alteration
๐Ÿ”น C. Flooding a server with traffic
๐Ÿ”น D. Encrypting data for confidentiality

๐Ÿ’ก Difficulty: easy | โœ… Correct: A

Q2. A company notices a sudden surge of HTTP requests that saturate its web server, causing legitimate users to experience timeouts. Which immediate response is most effective for mitigating the denialโ€‘ofโ€‘service impact while preserving service for real users?

๐Ÿ”น A. Block all incoming traffic from the Internet
๐Ÿ”น B. Implement rateโ€‘limiting and traffic shaping on the server edge
๐Ÿ”น C. Shut down the web application temporarily
๐Ÿ”น D. Increase server CPU frequency

๐Ÿ’ก Difficulty: medium | โœ… Correct: B

Q3. In a sophisticated attack, an adversary first performs a manโ€‘inโ€‘theโ€‘middle interception, then modifies the authentication token before forwarding it to the server, gaining admin privileges. Which layered defense strategy would most effectively detect and block this attack?

๐Ÿ”น A. Only use passwordโ€‘based authentication
๐Ÿ”น B. Deploy endpoint intrusion detection on client devices
๐Ÿ”น C. Implement mutual TLS with token signing and verification
๐Ÿ”น D. Rely on network firewalls to filter traffic

๐Ÿ’ก Difficulty: hard | โœ… Correct: C

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๐Ÿ”— Related Topics

๐Ÿ“ The Security Problem in Operating System๐Ÿ“ Program Threats in Operating System๐Ÿ“ Trojan horse๐Ÿ“ Trap door๐Ÿ“ Logic bomb
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