“Top 120 Computer Networks MCQs with Answers 2026”

 “Top 120 Computer Networks MCQs with Answers 2026”

Prepare smarter with Top 120 Computer Networks MCQs with Answers 2026 on MCQ Journey — your trusted platform for exam preparation and practice questions. This comprehensive collection of multiple-choice questions covers essential topics in computer networking, including OSI model, TCP/IP protocols, routing, switching, network security, and data communication. Each MCQ is carefully designed with detailed answers to help students, professionals, and competitive exam aspirants strengthen their concepts and improve accuracy. Whether you are preparing for university exams, GATE, UGC NET, campus placements, or IT certification tests, these practice questions provide the perfect resource for revision and self-assessment. With updated content for 2026, MCQ Journey ensures you stay ahead in your preparation with relevant, exam-focused material. Boost your confidence, test your knowledge, and achieve success in competitive exams with this authoritative set of Computer Networks MCQs with answers. Start practicing today and make exam preparation easier, faster, and more effective.

Q1. Which layer of the OSI model is responsible for end-to-end communication?

A. Network Layer B. Transport Layer C. Data Link Layer D. Application Layer Answer: B Explanation: The Transport Layer ensures reliable end-to-end communication using protocols like TCP.

Q2. Which protocol is used for secure communication over the internet?

A. HTTP B. FTP C. HTTPS D. SMTP Answer: C Explanation: HTTPS uses SSL/TLS encryption to secure communication.

Q3. In the OSI model, which layer handles logical addressing?

A. Data Link Layer B. Network Layer C. Transport Layer D. Session Layer Answer: B

Q4. Which device operates at the Data Link Layer?

A. Router B. Switch C. Hub D. Gateway Answer: B

Q5. Which protocol is connection-oriented?

A. UDP B. TCP C. ICMP D. ARP Answer: B

Q6. Which protocol is used for email transmission?

A. HTTP B. SMTP C. FTP D. SNMP Answer: B Explanation: SMTP (Simple Mail Transfer Protocol) is used for sending emails.

Q7. Which addressing scheme is used in IPv6?

A. 32-bit B. 64-bit C. 128-bit D. 256-bit Answer: C

Q8. Which device breaks up collision domains?

A. Hub B. Switch C. Repeater D. Modem Answer: B

Q9. Which protocol is used for dynamic IP assignment?

A. DNS B. DHCP C. ARP D. ICMP Answer: B

Q10. Which layer of TCP/IP corresponds to the OSI Application Layer?

A. Application Layer B. Transport Layer C. Internet Layer D. Network Access Layer Answer: A

Q11. Which protocol is used for file transfer?

A. FTP B. SMTP C. SNMP D. POP3 Answer: A

Q12. Which routing algorithm uses shortest path first?

A. Distance Vector B. Link State C. Flooding D. Random Walk Answer: B Explanation: Link State routing uses Dijkstra’s shortest path algorithm.

Q13. Which protocol translates domain names to IP addresses?

A. DHCP B. DNS C. ARP D. ICMP Answer: B

Q14. Which protocol is used for remote login?

A. Telnet B. FTP C. SMTP D. SNMP Answer: A

Q15. Which protocol is faster but unreliable?

A. TCP B. UDP C. ICMP D. ARP Answer: B Explanation: UDP is connectionless and faster but does not guarantee delivery.

Q16. Which protocol is used for error reporting in IP?

A. ARP B. ICMP C. TCP D. UDP Answer: B

Q17. Which layer of the OSI model provides encryption and compression?

A. Transport Layer B. Session Layer C. Presentation Layer D. Application Layer Answer: C

Q18. Which protocol is used to resolve IP addresses to MAC addresses?

A. DNS B. ARP C. DHCP D. ICMP Answer: B

Q19. Which device connects different networks?

A. Switch B. Router C. Hub D. Repeater Answer: B

Q20. Which protocol is used for secure file transfer?

A. FTP B. SFTP C. SMTP D. SNMP Answer: B

Q21. Which layer of TCP/IP handles routing?

A. Application Layer B. Transport Layer C. Internet Layer D. Network Access Layer Answer: C

Q22. Which protocol is used for network management?

A. SNMP B. SMTP C. FTP D. Telnet Answer: A

Q23. Which protocol is used for voice over IP?

A. SIP B. FTP C. SMTP D. SNMP Answer: A

Q24. Which protocol is used for time synchronization?

A. NTP B. FTP C. SMTP D. SNMP Answer: A

Q25. Which protocol is used for web browsing?

A. HTTP B. FTP C. SMTP D. SNMP Answer: A

Q26. Which protocol is used for secure shell access?

A. Telnet B. SSH C. FTP D. SNMP Answer: B

Q27. Which protocol is used for sending error messages in IP?

A. ICMP B. ARP C. DNS D. DHCP Answer: A

Q28. Which protocol is used for retrieving emails?

A. POP3 B. SMTP C. FTP D. SNMP Answer: A

Q29. Which protocol is used for monitoring network devices?

A. SNMP B. SMTP C. FTP D. POP3 Answer: A

Q30. Which protocol is used for multimedia streaming?

A. RTP B. FTP C. SMTP D. SNMP Answer: A

Q31. Which protocol is used for secure communication over VPN?

A. PPTP B. L2TP C. IPSec D. HTTP Answer: C

Q32. Which protocol is used for transferring hypertext documents?

A. HTTP B. FTP C. SMTP D. SNMP Answer: A

Q33. Which protocol is used for sending instant messages?

A. XMPP B. FTP C. SMTP D. SNMP Answer: A

Q34. Which protocol is used for remote desktop access?

A. RDP B. FTP C. SMTP D. SNMP Answer: A

Q35. Which protocol is used for secure email communication?

A. S/MIME B. FTP C. SMTP D. SNMP Answer: A

Q36. Which protocol is used for secure web browsing?

A. HTTP B. HTTPS C. FTP D. Telnet Answer: B

Q37. Which protocol is used for transferring emails between servers?

A. SMTP B. POP3 C. IMAP D. SNMP Answer: A

Q38. Which protocol is used for retrieving emails with offline access?

A. SMTP B. POP3 C. IMAP D. FTP Answer: B

Q39. Which protocol allows multiple devices to share one IP address?

A. NAT B. DHCP C. ARP D. ICMP Answer: A

Q40. Which protocol is used for instant messaging in real time?

A. XMPP B. FTP C. SMTP D. SNMP Answer: A

Q41. Which protocol is used for secure tunneling in VPNs?

A. PPTP B. L2TP C. IPSec D. HTTP Answer: C

Q42. Which protocol is used for transferring multimedia data?

A. RTP B. FTP C. SMTP D. SNMP Answer: A

Q43. Which protocol is used for remote device configuration?

A. Telnet B. SSH C. SNMP D. FTP Answer: C

Q44. Which protocol is used for secure email encryption?

A. S/MIME B. FTP C. SMTP D. SNMP Answer: A

Q45. Which protocol is used for network troubleshooting?

A. ICMP B. ARP C. DNS D. DHCP Answer: A Explanation: ICMP is used for diagnostic tools like ping and traceroute.

Q46. Which protocol is used for directory services?

A. LDAP B. FTP C. SMTP D. SNMP Answer: A

Q47. Which protocol is used for secure key exchange?

A. Diffie-Hellman B. RSA C. AES D. DES Answer: A

Q48. Which protocol is used for wireless LAN security?

A. WEP B. WPA2 C. WPA3 D. All of the above Answer: D

Q49. Which protocol is used for secure payment transactions?

A. SET B. FTP C. SMTP D. SNMP Answer: A

Q50. Which protocol is used for peer-to-peer file sharing?

A. BitTorrent B. FTP C. SMTP D. SNMP Answer: A

Q51. Which protocol is used for secure communication in IoT?

A. MQTT B. FTP C. SMTP D. SNMP Answer: A

Q52. Which protocol is used for cloud storage synchronization?

A. WebDAV B. FTP C. SMTP D. SNMP Answer: A

Q53. Which protocol is used for secure password authentication?

A. Kerberos B. FTP C. SMTP D. SNMP Answer: A

Q54. Which protocol is used for secure wireless authentication?

A. EAP B. FTP C. SMTP D. SNMP Answer: A

Q55. Which protocol is used for secure communication in mobile networks?

A. LTE B. GSM C. 5G NR D. All of the above Answer: D

Q56. Which protocol is used for secure wireless communication?

A. WPA2 B. WEP C. WPA3 D. All of the above Answer: D

Q57. Which protocol is used for secure web transactions?

A. SSL B. FTP C. SMTP D. SNMP Answer: A

Q58. Which protocol is used for secure instant messaging?

A. XMPP with TLS B. FTP C. SMTP D. SNMP Answer: A

Q59. Which protocol is used for secure VPN tunneling?

A. IPSec B. PPTP C. L2TP D. All of the above Answer: D

Q60. Which protocol is used for secure IoT communication?

A. MQTT with TLS B. FTP C. SMTP D. SNMP Answer: A

Q61. Which protocol is used for secure cloud storage?

A. WebDAV with HTTPS B. FTP C. SMTP D. SNMP Answer: A

Q62. Which protocol is used for secure password exchange?

A. Kerberos B. FTP C. SMTP D. SNMP Answer: A

Q63. Which protocol is used for secure wireless authentication?

A. EAP-TLS B. FTP C. SMTP D. SNMP Answer: A

Q64. Which protocol is used for secure mobile communication?

A. LTE B. GSM C. 5G NR D. All of the above Answer: D

Q65. Which protocol is used for secure payment gateways?

A. SET B. FTP C. SMTP D. SNMP Answer: A

Q66. Which protocol is used for secure peer-to-peer communication?

A. BitTorrent with encryption B. FTP C. SMTP D. SNMP Answer: A

Q67. Which protocol is used for secure IoT device management?

A. CoAP with DTLS B. FTP C. SMTP D. SNMP Answer: A

Q68. Which protocol is used for secure cloud synchronization?

A. WebDAV with HTTPS B. FTP C. SMTP D. SNMP Answer: A

Q69. Which protocol is used for secure authentication in enterprise networks?

A. Kerberos B. FTP C. SMTP D. SNMP Answer: A

Q70. Which protocol is used for secure wireless key exchange?

A. Diffie-Hellman B. RSA C. AES D. DES Answer: A

Q71. Which protocol is used for secure multimedia streaming?

A. RTP with SRTP B. FTP C. SMTP D. SNMP Answer: A

Q72. Which protocol is used for secure directory services?

A. LDAP with SSL B. FTP C. SMTP D. SNMP Answer: A

Q73. Which protocol is used for secure remote desktop access?

A. RDP with TLS B. FTP C. SMTP D. SNMP Answer: A

Q74. Which protocol is used for secure instant file sharing?

A. SFTP B. FTP C. SMTP D. SNMP Answer: A

Q75. Which protocol is used for secure IoT sensor communication?

A. MQTT with TLS B. FTP C. SMTP D. SNMP Answer: A

Q76. Which protocol is used for secure email retrieval?

A. IMAP with SSL B. FTP C. SMTP D. SNMP Answer: A

Q77. Which protocol is used for secure wireless LANs?

A. WPA2 B. WEP C. WPA3 D. All of the above Answer: D

Q78. Which protocol is used for secure instant messaging in enterprises?

A. XMPP with TLS B. FTP C. SMTP D. SNMP Answer: A

Q79. Which protocol is used for secure VPN communication?

A. IPSec B. PPTP C. L2TP D. All of the above Answer: D

Q80. Which protocol is used for secure IoT data transfer?

A. CoAP with DTLS B. FTP C. SMTP D. SNMP Answer: A

Q81. Which protocol is used for secure cloud file sharing?

A. SFTP B. FTP C. SMTP D. SNMP Answer: A

Q82. Which protocol is used for secure authentication in Windows domains?

A. Kerberos B. FTP C. SMTP D. SNMP Answer: A

Q83. Which protocol is used for secure wireless session management?

A. EAP-TLS B. FTP C. SMTP D. SNMP Answer: A

Q84. Which protocol is used for secure multimedia conferencing?

A. SIP with TLS B. FTP C. SMTP D. SNMP Answer: A

Q85. Which protocol is used for secure directory lookups?

A. LDAP with SSL B. FTP C. SMTP D. SNMP Answer: A

Q86. Which protocol is used for secure remote server management?

A. SSH B. Telnet C. FTP D. SNMP Answer: A

Q87. Which protocol is used for secure instant file transfer?

A. SFTP B. FTP C. SMTP D. SNMP Answer: A

Q88. Which protocol is used for secure IoT device communication?

A. MQTT with TLS B. FTP C. SMTP D. SNMP Answer: A

Q89. Which protocol is used for secure wireless encryption?

A. WPA3 B. WEP C. WPA2 D. All of the above Answer: A

Q90. Which protocol is used for secure payment authentication?

A. 3D Secure B. FTP C. SMTP D. SNMP Answer: A

Q91. Which protocol is used for secure peer-to-peer messaging?

A. Signal Protocol B. FTP C. SMTP D. SNMP Answer: A

Q92. Which protocol is used for secure IoT sensor data?

A. CoAP with DTLS B. FTP C. SMTP D. SNMP Answer: A

Q93. Which protocol is used for secure cloud synchronization?

A. WebDAV with HTTPS B. FTP C. SMTP D. SNMP Answer: A

Q94. Which protocol is used for secure enterprise authentication?

A. Kerberos B. FTP C. SMTP D. SNMP Answer: A

Q95. Which protocol is used for secure multimedia streaming?

A. SRTP B. FTP C. SMTP D. SNMP Answer: A

Q96. Which protocol is used for secure email storage?

A. IMAP with SSL B. FTP C. SMTP D. SNMP Answer: A

Q97. Which protocol is used for secure wireless encryption?

A. WPA3 B. WEP C. WPA2 D. All of the above Answer: A

Q98. Which protocol is used for secure enterprise instant messaging?

A. XMPP with TLS B. FTP C. SMTP D. SNMP Answer: A

Q99. Which protocol is used for secure VPN authentication?

A. IPSec B. PPTP C. L2TP D. All of the above Answer: D

Q100. Which protocol is used for secure IoT communication in constrained devices?

A. CoAP with DTLS B. FTP C. SMTP D. SNMP Answer: A

Q101. Which protocol is used for secure cloud backup?

A. SFTP B. FTP C. SMTP D. SNMP Answer: A

Q102. Which protocol is used for secure authentication in Linux systems?

A. Kerberos B. FTP C. SMTP D. SNMP Answer: A

Q103. Which protocol is used for secure wireless session initiation?

A. EAP-TLS B. FTP C. SMTP D. SNMP Answer: A

Q104. Which protocol is used for secure multimedia calls?

A. SIP with TLS B. FTP C. SMTP D. SNMP Answer: A

Q105. Which protocol is used for secure directory authentication?

A. LDAP with SSL B. FTP C. SMTP D. SNMP Answer: A

Q106. Which protocol is used for secure server login?

A. SSH B. Telnet C. FTP D. SNMP Answer: A

Q107. Which protocol is used for secure file synchronization?

A. SFTP B. FTP C. SMTP D. SNMP Answer: A

Q108. Which protocol is used for secure IoT device updates?

A. MQTT with TLS B. FTP C. SMTP D. SNMP Answer: A

Q109. Which protocol is used for secure wireless authentication in enterprises?

A. WPA2-Enterprise B. WEP C. WPA3-Personal D. All of the above Answer: A

Q110. Which protocol is used for secure payment verification?

A. 3D Secure B. FTP C. SMTP D. SNMP Answer: A

Q111. Which protocol is used for secure peer-to-peer encryption?

A. Signal Protocol B. FTP C. SMTP D. SNMP Answer: A

Q112. Which protocol is used for secure IoT telemetry?

A. CoAP with DTLS B. FTP C. SMTP D. SNMP Answer: A

Q113. Which protocol is used for secure cloud collaboration?

A. WebDAV with HTTPS B. FTP C. SMTP D. SNMP Answer: A

Q114. Which protocol is used for secure enterprise login?

A. Kerberos B. FTP C. SMTP D. SNMP Answer: A

Q115. Which protocol is used for secure video streaming?

A. SRTP B. FTP C. SMTP D. SNMP Answer: A

Q116. Which protocol is used for secure IoT gateway communication?

A. MQTT with TLS B. FTP C. SMTP D. SNMP Answer: A

Q117. Which protocol is used for secure wireless roaming?

A. EAP-TTLS B. FTP C. SMTP D. SNMP Answer: A

Q118. Which protocol is used for secure multimedia conferencing authentication?

A. SIP with TLS B. FTP C. SMTP D. SNMP Answer: A

Q119. Which protocol is used for secure directory synchronization?

A. LDAP with SSL B. FTP C. SMTP D. SNMP Answer: A

Q120. Which protocol is used for secure remote desktop encryption?

A. RDP with TLS B. FTP C. SMTP D. SNMP Answer: A

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