Security Questions and Answers
Security in networking is a critical area covering data protection, encryption, authentication, and secure communication protocols. This section provides network security interview questions and answers designed to prepare you for placements in TCS, Infosys, HCL, and cybersecurity roles. Topics include firewalls, VPNs, intrusion detection, and cryptographic algorithms. Each question offers a clear explanation, making complex concepts easy to understand. Practicing these placement papers with answers helps candidates strengthen their knowledge in cybersecurity and network defense strategies, ensuring readiness for both technical and HR interview rounds.
Security
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44 questions
21. A firewall primarily works at which layer of the OSI model?
- Session layer
- Application layer
- Network layer
- Data link layer
22. Which type of attack involves overwhelming a system with traffic?
- MITM
- Phishing
- DDoS
- Spoofing
23. Which device prevents unauthorized access between networks?
- Hub
- Router
- Firewall
- Switch
24. SSL/TLS works on which layer of OSI model?
- Transport layer
- Network layer
- Session layer
- Presentation layer
25. What does the term encryption mean?
- Compressing data
- Converting data into unreadable form
- Deleting data
- Sharing data
26. Which of the following is a strong password example?
- 1234567
- password@123
- Pa$$w0rd!9
- qwerty000
27. Which security method uses two or more verification factors?
- Authentication
- Authorization
- MFA
- Accounting
28. Which virus spreads by attaching itself to executable files?
- Worm
- Trojan
- Macro virus
- File-infecting virus
29. A Trojan horse is best described as:
- Self-replicating malware
- Malware disguised as useful software
- Malware that encrypts files
- Malware controlling remote systems
30. What does a VPN mainly provide?
- Faster Internet
- Encrypted communication
- Public IP address
- Higher bandwidth