📝 Intrusion detection

📖 From Operating System • 15. Security • 24 questions available

Practice MCQs for Intrusion detection. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-27

Easy Questions

Medium Questions

Hard Questions

Q1. What is the primary purpose of the UNIX utility rsh in the context of worm propagation?

🔹 A. To encrypt network traffic between hosts

🔹 B. To execute commands on a remote host without requiring a password each time

🔹 C. To monitor system logs for suspicious activity

🔹 D. To provide a graphical interface for managing services

💡 Difficulty: easy | ✅ Correct: B

Q2. Why do .rhosts files increase the risk of unauthorized remote access?

🔹 A. They disable firewall rules on the host

🔹 B. They encrypt all outgoing traffic

🔹 C. They allow password‑less logins for listed hosts

🔹 D. They limit user privileges on the local machine

💡 Difficulty: medium | ✅ Correct: D

Q3. Why is exploiting the sendmail daemon considered more dangerous than exploiting a user‑level program?

🔹 A. The daemon runs with higher privileges, potentially granting root access

🔹 B. The daemon only processes email, limiting impact

🔹 C. The daemon is rarely used, so attacks go unnoticed

🔹 D. The daemon encrypts all network traffic, making detection harder

💡 Difficulty: hard | ✅ Correct: D

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