Network MCQs

This comprehensive set of Network MCQs is designed to cover all essential topics required for success in exams related to computer networking and communication systems. Focused on key subjects such as network architectures, protocols, network security, routing and switching, and wireless communications, these MCQs are crafted to help students build a strong foundation in networking concepts and applications.

Who should practice Network MCQs?

Students preparing for computer science, information technology, or networking courses that include networking concepts and protocols.
Individuals aiming to strengthen their understanding of network architectures (LAN, WAN, MAN) and models (OSI, TCP/IP).
Candidates preparing for networking certification exams such as CompTIA Network+, Cisco CCNA, or Microsoft Networking certifications.
Learners interested in mastering routing algorithms, switching techniques, and network security measures.
Professionals focused on improving their skills in network design, troubleshooting, and administration.
Suitable for all aspirants seeking to enhance their knowledge and performance in networking for academic or professional success.

1. What does LAN stand for in networking?

A) Local Area Network
B) Long Area Network
C) Large Area Network
D) Low Area Network

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2. Which device is used to connect multiple devices on a network?

A) Router
B) Switch
C) Hub
D) All of the above

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3. What protocol is used to send emails?

A) FTP
B) SMTP
C) HTTP
D) SNMP

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4. Which of the following is a private IP address?

A) 192.168.1.1
B) 172.16.0.1
C) 10.0.0.1
D) All of the above

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5. What does the term “bandwidth” refer to?

A) The distance a signal can travel
B) The maximum data transfer rate of a network
C) The amount of noise in a network
D) The number of devices on a network

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6. What is the main function of a router?

A) To connect devices within a local network
B) To filter network traffic
C) To route data between different networks
D) To increase bandwidth

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7. Which of the following is a common network topology?

A) Star
B) Circle
C) Square
D) Triangle

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8. What does TCP stand for?

A) Transfer Control Protocol
B) Transmission Control Protocol
C) Transport Control Protocol
D) Total Control Protocol

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9. Which layer of the OSI model is responsible for data encryption?

A) Application
B) Transport
C) Session
D) Presentation

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10. What is a VPN?

A) Virtual Private Network
B) Very Private Network
C) Variable Public Network
D) Visual Public Network

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11. Which of the following protocols is used for file transfer?

A) HTTP
B) FTP
C) SNMP
D) SMTP

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12. What does DHCP stand for?

A) Dynamic Host Configuration Protocol
B) Data Host Control Protocol
C) Dynamic Host Control Protocol
D) Data Host Configuration Protocol

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13. Which layer of the OSI model is responsible for routing?

A) Data Link
B) Network
C) Transport
D) Application

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14. What does the acronym NAT stand for?

A) Network Address Translation
B) Network Allocation Table
C) New Address Transfer
D) Network Address Transfer

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15. Which device operates at the Data Link layer of the OSI model?

A) Router
B) Switch
C) Hub
D) Firewall

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16. What is the default port for HTTP?

A) 21
B) 25
C) 80
D) 443

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17. Which protocol is used for secure data transmission over the Internet?

A) FTP
B) HTTP
C) HTTPS
D) SMTP

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18. What is the maximum length of a CAT5 Ethernet cable?

A) 50 meters
B) 100 meters
C) 150 meters
D) 200 meters

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19. Which of the following is NOT a type of network?

A) LAN
B) WAN
C) PAN
D) MANAGER

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20. What does the term “ping” refer to in networking?

A) A tool to measure network latency
B) A type of network cable
C) A protocol for email
D) A network topology

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21. What is the primary purpose of a firewall?

A) To improve bandwidth
B) To secure a network by filtering traffic
C) To increase speed
D) To manage IP addresses

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22. Which of the following protocols is used for remote access?

A) FTP
B) SSH
C) HTTP
D) SMTP

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23. What does the term “latency” refer to in networking?

A) The maximum data transfer rate
B) The delay before a transfer of data begins
C) The amount of data sent
D) The number of connections

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24. What is the function of a network switch?

A) To connect different networks
B) To connect devices within the same network
C) To enhance wireless signals
D) To filter internet traffic

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25. What does the term “throughput” refer to?

A) The amount of data transferred in a given time
B) The maximum data transfer rate
C) The amount of noise in a network
D) The total number of users

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26. Which of the following is a common network protocol?

A) TCP/IP
B) BGP
C) ICMP
D) All of the above

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27. What does the acronym WAP stand for in networking?

A) Wireless Application Protocol
B) Wireless Access Point
C) Web Application Protocol
D) Wide Area Protocol

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28. What is the purpose of the OSI model?

A) To define the physical layout of a network
B) To standardize network protocols
C) To manage hardware devices
D) To enhance network security

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29. Which of the following topologies offers the highest reliability?

A) Bus
B) Ring
C) Star
D) Mesh

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30. What does the term “subnetting” refer to?

A) Dividing a network into smaller, manageable pieces
B) Merging two networks together
C) Increasing network bandwidth
D) Enhancing security protocols

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31. Which of the following is a network layer protocol?

A) TCP
B) IP
C) UDP
D) HTTP

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32. What is the purpose of a DNS?

A) To assign IP addresses
B) To translate domain names to IP addresses
C) To manage traffic on the internet
D) To secure data transmissions

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33. What does the term “MAC address” stand for?

A) Media Access Control address
B) Media Allocation Control address
C) Multiple Access Control address
D) Main Access Control address

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34. What is a proxy server?

A) A server that manages database queries
B) A server that acts as an intermediary for requests from clients
C) A server that stores backups
D) A server that routes emails

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35. Which protocol is used to retrieve email from a mail server?

A) SMTP
B) IMAP
C) FTP
D) SNMP

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36. What does VLAN stand for?

A) Virtual Local Area Network
B) Variable Local Area Network
C) Very Large Area Network
D) Virtual Large Area Network

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37. What is the purpose of network load balancing?

A) To secure data
B) To distribute network traffic across multiple servers
C) To increase network speed
D) To manage user access

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38. Which of the following is a characteristic of IPv6?

A) It uses 32-bit addresses
B) It allows for more unique IP addresses
C) It is less secure than IPv4
D) It does not support autoconfiguration

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39. What is the role of ICMP in networking?

A) To manage file transfers
B) To provide error messages and operational information
C) To secure data transmissions
D) To route packets

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40. Which of the following is an example of a network management protocol?

A) HTTP
B) SNMP
C) FTP
D) SMTP

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41. What is the maximum number of devices on a single Ethernet segment?

A) 10
B) 100
C) 1024
D) 2048

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42. What does the acronym SSL stand for?

A) Secure Socket Layer
B) Simple Socket Layer
C) Secure Session Layer
D) Socket Security Layer

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43. What is a “man-in-the-middle” attack?

A) An attack that involves intercepting communications between two parties
B) An attack that targets the server
C) An attack that uses malware
D) An attack that exploits weak passwords

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44. What does the term “network topology” refer to?

A) The physical layout of a network
B) The type of cables used
C) The number of users in a network
D) The speed of the network

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45. Which device is used to connect different networks together?

A) Switch
B) Hub
C) Router
D) Repeater

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46. What is a “broadcast domain”?

A) A network segment where all devices can receive broadcast packets
B) A network segment for storing data
C) A type of network topology
D) A security feature

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47. What does the term “network address space” refer to?

A) The total number of addresses available in a network
B) The physical space occupied by network devices
C) The area used for data storage
D) The distance covered by a network

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48. What is the purpose of the ARP protocol?

A) To manage email delivery
B) To resolve IP addresses to MAC addresses
C) To encrypt data
D) To establish secure connections

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49. Which type of network uses a token for managing access?

A) Token Ring
B) Ethernet
C) Wi-Fi
D) DSL

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50. What is the purpose of a DMZ in networking?

A) To provide a buffer zone between the internet and internal network
B) To enhance speed
C) To manage user access
D) To store data

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51. What does the term “network monitoring” mean?

A) Keeping track of network performance and health
B) Changing network configurations
C) Increasing network security
D) Backing up data

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52. What is the function of an access point?

A) To connect wired and wireless networks
B) To filter traffic
C) To provide network security
D) To increase bandwidth

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53. Which layer of the OSI model is responsible for data formatting?

A) Application
B) Presentation
C) Transport
D) Network

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54. What is the purpose of network segmentation?

A) To divide a network into smaller parts for performance and security
B) To increase network size
C) To reduce latency
D) To manage bandwidth

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55. What does the term “firewall” refer to in networking?

A) A device that prevents unauthorized access to a network
B) A type of encryption
C) A network monitoring tool
D) A backup solution

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56. What protocol is primarily used for network management?

A) FTP
B) SNMP
C) SMTP
D) HTTP

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57. What does the acronym QoS stand for?

A) Quality of Service
B) Queue of Servers
C) Quantity of Systems
D) Quality of Systems

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58. What is the purpose of network redundancy?

A) To improve network reliability and availability
B) To reduce latency
C) To enhance speed
D) To increase bandwidth

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59. Which device is typically used for connecting two different types of networks?

A) Router
B) Switch
C) Hub
D) Repeater

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60. What is the primary function of the transport layer in the OSI model?

A) To provide end-to-end communication
B) To manage physical connections
C) To route packets
D) To format data

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61. Which of the following is a disadvantage of a star topology?

A) Easy to install and manage
B) Requires more cable
C) Failure of one device affects the entire network
D) High performance

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62. What does the term “throughput” refer to?

A) The actual speed of data transfer in a network
B) The maximum capacity of a network
C) The time it takes to send data
D) The amount of data lost during transmission

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63. Which of the following is an example of a wide area network (WAN)?

A) A home network
B) A local business network
C) The internet
D) A classroom network

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64. What is the maximum data transfer rate for a Fast Ethernet connection?

A) 10 Mbps
B) 100 Mbps
C) 1 Gbps
D) 10 Gbps

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65. What is the role of the Session layer in the OSI model?

A) To establish, maintain, and terminate connections
B) To format data for presentation
C) To route data packets
D) To manage physical network connections

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66. Which type of attack involves overwhelming a network with traffic?

A) Phishing
B) DDoS
C) Man-in-the-Middle
D) Spoofing

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67. What does the term “data packet” refer to?

A) A unit of data formatted for transmission
B) A backup file
C) A type of software
D) A network device

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68. What is the function of a network adapter?

A) To connect a device to a network
B) To manage network traffic
C) To secure data
D) To increase bandwidth

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69. What does the acronym RADIUS stand for?

A) Remote Authentication Dial-In User Service
B) Remote Access Data Information User Service
C) Redundant Authentication Dial-In User Service
D) Random Access Data Information User Service

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70. What is a “cold backup” in networking?

A) A backup taken while the system is offline
B) A backup taken while the system is online
C) A backup that is not stored securely
D) A backup that is not encrypted

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71. Which of the following is used to improve wireless network security?

A) WEP
B) WAP
C) WAN
D) TCP

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72. What is the function of the Application layer in the OSI model?

A) To provide services for end-user applications
B) To format data for transmission
C) To establish connections
D) To manage routing

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73. What is the purpose of a network topology diagram?

A) To visualize the layout of a network
B) To define security protocols
C) To manage bandwidth
D) To store user data

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74. What does the acronym TFTP stand for?

A) Trivial File Transfer Protocol
B) Trusted File Transfer Protocol
C) Temporary File Transfer Protocol
D) Transport File Transfer Protocol

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75. Which of the following is NOT a type of network attack?

A) Denial of Service
B) SQL Injection
C) Firewall Bypass
D) Malware Infection

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76. What is the main purpose of an IDS (Intrusion Detection System)?

A) To prevent unauthorized access
B) To monitor network traffic for suspicious activity
C) To increase bandwidth
D) To manage user authentication

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77. What does the term “bitrate” refer to in networking?

A) The number of bits processed per unit of time
B) The size of a data packet
C) The total number of bytes transferred
D) The amount of data stored

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78. Which protocol is used for domain name resolution?

A) ICMP
B) ARP
C) DNS
D) FTP

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79. What does the acronym VPN stand for?

A) Virtual Private Network
B) Virtual Public Network
C) Verified Private Network
D) Virtual Protocol Network

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80. What is a “port” in networking?

A) A physical connection point
B) A logical endpoint for communication
C) A type of network cable
D) A security feature

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81. What is the function of a repeater in networking?

A) To amplify and regenerate signals
B) To filter network traffic
C) To manage user access
D) To connect different networks

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82. Which of the following is a characteristic of a peer-to-peer network?

A) Centralized management
B) All devices have equal status
C) Requires a server
D) Limited scalability

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83. What does the term “overhead” refer to in networking?

A) The additional data required for communication
B) The total amount of data sent
C) The amount of data lost
D) The maximum bandwidth available

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84. Which of the following is an example of a digital subscriber line (DSL)?

A) Fiber optic
B) Satellite
C) ADSL
D) Ethernet

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85. What does the acronym MTA stand for?

A) Mail Transfer Agent
B) Media Transfer Agent
C) Managed Transfer Application
D) Mail Transmission Application

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86. What is the purpose of a load balancer?

A) To manage email delivery
B) To distribute incoming network traffic across multiple servers
C) To enhance wireless signals
D) To filter traffic

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87. What does the acronym SSID stand for?

A) Service Set Identifier
B) Secure Set Identifier
C) Simple Set Identifier
D) System Set Identifier

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88. Which of the following is a characteristic of IPv4?

A) Uses 128-bit addresses
B) Has a smaller address space than IPv6
C) Is less widely used than IPv6
D) Provides better security than IPv6

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89. What is the main purpose of an SSL certificate?

A) To encrypt data transmitted over the Internet
B) To identify a website’s owner
C) To ensure data integrity
D) All of the above

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90. Which of the following best describes a subnet mask?

A) It identifies a network segment in an IP address
B) It is used for data encryption
C) It determines the maximum bandwidth
D) It manages user access

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91. What does the acronym BGP stand for?

A) Border Gateway Protocol
B) Basic Gateway Protocol
C) Binary Gateway Protocol
D) Backup Gateway Protocol

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92. What is the primary function of the Data Link layer in the OSI model?

A) To provide error detection and correction
B) To manage routing
C) To format data
D) To secure data

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93. Which of the following describes a distributed denial-of-service (DDoS) attack?

A) An attack from a single source
B) An attack from multiple sources targeting a single point
C) An attack that targets data integrity
D) An attack that encrypts data

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94. What does the acronym FTP stand for?

A) File Transfer Protocol
B) Fast Transfer Protocol
C) Flexible Transfer Protocol
D) Fundamental Transfer Protocol

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95. Which of the following is a characteristic of a star topology?

A) All devices are connected in a line
B) It is easy to install and manage
C) Failure of one device affects the entire network
D) It is less expensive than other topologies

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96. What is the role of the Network layer in the OSI model?

A) To provide end-to-end communication
B) To route packets between devices
C) To format data
D) To manage physical connections

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97. Which of the following is a widely used network encryption protocol?

A) WPA
B) WEP
C) SSL/TLS
D) L2TP

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98. What does the acronym DHCP stand for?

A) Dynamic Host Configuration Protocol
B) Dynamic Host Control Protocol
C) Data Host Configuration Protocol
D) Data Host Control Protocol

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99. What is a “backdoor” in networking?

A) A method of bypassing normal authentication
B) A secure connection
C) A type of network device
D) A protocol for data transfer

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100. What is the main function of network segmentation?

A) To improve network performance and security
B) To connect different networks
C) To increase bandwidth
D) To manage user access

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