Computer Networks – Multiple Choice Questions (MCQs)

1. 49. What is a switch?

   • A. A networking device that forwards data packets based on MAC addresses within a local network
   • B. A device that routes packets between networks
   • C. A device that modulates and demodulates signals
   • D. A type of network software

2. 50. What is a hub?

   • A. A networking device that forwards all received data to all connected devices
   • B. A device that intelligently forwards packets
   • C. A device that filters network traffic
   • D. A type of network connector

3. 51. What is a firewall?

   • A. A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules
   • B. A device that amplifies network signals
   • C. A type of network cable
   • D. A protocol for secure communication

4. 52. What is a VPN?

   • A. Virtual Private Network
   • B. Very Public Network
   • C. Video Processing Network
   • D. Voice Protocol Network

5. 53. What is network congestion?

   • A. A condition in a network where data packets face delays due to network saturation
   • B. A physical damage to network cables
   • C. A software error in network devices
   • D. A security breach in the network

6. 54. What is Quality of Service (QoS)?

   • A. The overall performance of a network
   • B. Mechanisms to prioritize certain types of network traffic
   • C. The physical layout of the network
   • D. The security protocols used

7. 55. What is subnetting?

   • A. The process of dividing a network into smaller subnetworks
   • B. The process of combining multiple networks into one
   • C. The process of assigning IP addresses
   • D. The process of routing network traffic

8. 56. What is a subnet mask?

   • A. A numerical label assigned to each device in a TCP/IP network that distinguishes the network prefix and the host suffix
   • B. A type of network cable
   • C. A network security protocol
   • D. A routing table entry

9. 57. What is routing?

   • A. The process of selecting paths for traffic in a network or across multiple networks
   • B. The process of connecting devices within a local network
   • C. The process of detecting network errors
   • D. The process of encrypting network data

10. 58. What is a routing protocol?

    • A. A set of rules that routers use to communicate with each other and determine the best paths for data packets
    • B. A type of network hardware
    • C. A network security standard
    • D. A data transmission medium

11. 59. Which of the following is a routing protocol?

    • A. OSPF
    • B. HTTP
    • C. FTP
    • D. SMTP

12. 60. What is network latency?

    • A. The delay in data transfer across a network
    • B. The speed of data transmission
    • C. The number of devices on a network
    • D. The physical distance between devices