Computer Networking MCQs with answers Page - 2

Dear candidates you will find MCQ questions of Computer Networking here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
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Q. Which device simply forwards data without filtering?

  • (A) Hub
  • (B) Switch
  • (C) Router
  • (D) Firewall
💬 Discuss
✅ Correct Answer: (A) Hub
Explanation: A hub broadcasts data to all devices without filtering. Switches filter using MAC addresses, routers filter by IP, and firewalls control traffic based on rules.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

Q. What is the maximum length of a standard Ethernet cable (Cat5/5e)?

  • (A) 50 meters
  • (B) 100 meters
  • (C) 200 meters
  • (D) 500 meters
💬 Discuss
✅ Correct Answer: (B) 100 meters
Explanation: Ethernet (Cat5/5e) cables have a maximum recommended length of 100 meters for reliable communication.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

Q. Which protocol is used to securely transfer files?

  • (A) FTP
  • (B) TFTP
  • (C) SFTP
  • (D) SMTP
💬 Discuss
✅ Correct Answer: (C) SFTP
Explanation: SFTP (Secure File Transfer Protocol) provides encrypted file transfers. FTP and TFTP are insecure. SMTP is for email.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

Q. Which IP version uses 128-bit addressing?

  • (A) IPv4
  • (B) IPv6
  • (C) IPX
  • (D) ARP
💬 Discuss
✅ Correct Answer: (B) IPv6
Explanation: IPv6 uses 128-bit addressing, providing a much larger address space than IPv4 (32-bit). IPX and ARP are different protocols.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

Q. Which layer of OSI ensures data encryption?

  • (A) Session Layer
  • (B) Transport Layer
  • (C) Presentation Layer
  • (D) Application Layer
💬 Discuss
✅ Correct Answer: (C) Presentation Layer
Explanation: The Presentation Layer is responsible for data encryption, compression, and translation. Transport handles reliability, Session manages connections.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

Q. Which protocol assigns IP addresses automatically?

  • (A) DNS
  • (B) DHCP
  • (C) ICMP
  • (D) SNMP
💬 Discuss
✅ Correct Answer: (B) DHCP
Explanation: DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses. DNS resolves domain names, ICMP is for errors, SNMP manages devices.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

Q. Which cable is immune to electromagnetic interference?

  • (A) Coaxial cable
  • (B) Twisted pair cable
  • (C) Fiber optic cable
  • (D) Ethernet Cat5 cable
💬 Discuss
✅ Correct Answer: (C) Fiber optic cable
Explanation: Fiber optic cables use light instead of electrical signals, making them immune to EMI. Coaxial and twisted pair can be affected.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

Q. Which protocol is used to transfer web pages?

  • (A) FTP
  • (B) HTTP
  • (C) SMTP
  • (D) IMAP
💬 Discuss
✅ Correct Answer: (B) HTTP
Explanation: HTTP (HyperText Transfer Protocol) is used to transfer web pages. FTP is for files, SMTP for sending email, IMAP for retrieving email.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

Q. Which address is used by switches to forward frames?

  • (A) IP Address
  • (B) MAC Address
  • (C) Port Number
  • (D) Subnet Mask
💬 Discuss
✅ Correct Answer: (B) MAC Address
Explanation: Switches operate at Layer 2 and use MAC addresses to forward frames. IP addresses are Layer 3, ports are Transport Layer.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

Q. Which layer is responsible for physical transmission of data?

  • (A) Data Link Layer
  • (B) Network Layer
  • (C) Transport Layer
  • (D) Physical Layer
💬 Discuss
✅ Correct Answer: (D) Physical Layer
Explanation: The Physical Layer transmits raw bits over the physical medium like cables and wireless. Other layers handle logical addressing and data management.

Published by Ankit Singh ⭐ 8.48K Points at 27-Sep-2025 08:12 am in Computer Networking

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