📝 System and Network Threats

📖 From Operating System • 15. Security • 10 questions available

Practice MCQs for System and Network Threats. 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

📝 Sample Questions

Q1. What is the definition of masquerading in network security?

🔹 A. An attacker pretends to be another host or user

🔹 B. An attacker blocks all traffic between two hosts

🔹 C. An attacker encrypts data to hide it from monitors

🔹 D. An attacker deletes system logs to cover tracks

💡 Difficulty: easy | ✅ Correct: A

Q2. How does a replay attack differ from a man‑in‑the‑middle attack?

🔹 A. Replay reuses old messages without alteration, while MITM intercepts and may modify live traffic

🔹 B. Replay modifies messages, whereas MITM only records them

🔹 C. Replay works only on encrypted data, MITM only on plaintext

🔹 D. Replay requires physical access, MITM does not

💡 Difficulty: medium | ✅ Correct: A

Q3. An attacker first hijacks a TLS session, then performs a man‑in‑the‑middle attack, and finally replays a modified request to transfer funds. Which layered defense strategy best mitigates this multi‑stage attack?

🔹 A. Use TLS with mutual authentication, enforce per‑message nonces, and monitor anomalous transaction patterns

🔹 B. Deploy a perimeter firewall only

🔹 C. Rely solely on password complexity requirements

🔹 D. Apply static IP filtering for all clients

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 The Security Problem in Operating System 📝 Program Threats in Operating System 📝 Trojan horse 📝 Trap door 📝 Logic bomb

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