80+ Important MCQ on Computer Network Class 12
1. A Computer Network:
a) Is a collection of hardware components and computers?
b) Is interconnected by communication channels
c) Allows sharing of resources and information
d) All of the above
2. What is a Firewall in computer network?
a) The physical boundary of network
b) An operating system of computer network
c) A system designed to prevent unauthorized access
d) A web browsing software
3. What is the use of Bridge in the Network?
a) To connect LANs
b) To separate LANs
c) To control network speed
d) All of the above
4. Each IP packet must contain:
a) Only Source address
b) Only Destination address
c) Source and Destination address
d) Source or Destination address
5. Which of these is not a communication channel?
a) Satellite
b) Microwave
c) Radio wave
d) Wi-Fi
6. MAN Stands for _____.
a) Metropolitan Area Network
b) Main Area Network
c) Metropolitan Access Network
d) Metro Access Network
7. Which of the following is the smallest network?
a) WAN
b) MAN
c) PAN
d) LAN
8. Which transmission media is capable of having a much higher bandwidth (data capacity)?
a) Coaxial
b) Twisted pair cable
c) Untwisted cable
d) Fiber optic
9. Which type of transmission media is the least expensive to manufacture?
a) Coaxial
b) Twisted pair cable
c) CAT cable
d) Fiber optic
10. A device that forwards data packet from one network to another is called a
a) Bridge
b) Router
c) Hub
d) Gateway
11. What is a standalone computer?
a) A computer that is not connected to a network
b) A computer that is being used as a server
c) A computer that does not have any peripherals attached to it
d) A computer that is used by only one person
12. Which of the following is the fastest media of data transfer?
a) Co-axial Cable
b) Untwisted Wire
c) Telephone Lines
d) Fiber Optic
13. Hub is a
a) Broadcast device
b) Unicast device
c) Multicast device
d) None of the above
14. Switch is a
a) Broadcast device
b) Unicast device
c) Multicast device
d) None of the above
15. The device that can operate in place of a hub is a:
a) Switch
b) Bridge
c) Router
d) Gateway
16. In computer, converting a digital signal in to an analog signal is called
a) modulation
b) demodulation
c) conversion
d) transformation
17. What is the address size of IPv6?
a) 32 bit
b) 64 bit
c) 128 bit
d) 256 bit
18. Which of these is not an example of unguided media?
a) Optical Fibre Cable
b) Radio wave
c) Bluetooth
d) Satellite
19. Two devices are in network if
a) A process in one device is able to exchange information with a process in another device
b) A process is running on both devices
c) The processes running of different devices are of same type
d) None of the above.
20. Which of the following is not the Networking Devices?
a) Gateways
b) Linux
c) Routers
d) Firewalls
21. The location of a resource on the internet is given by its?
a) Protocol
b) URL
c) E-mail address
d) ICQ
22. The term HTTP stands for?
a) Hyper terminal tracing program
b) Hypertext tracing protocol
c) Hypertext transfer protocol
d) Hypertext transfer program
23. Which software prevents the external access to a system?
a) Firewall
b) Gateway
c) Router
d)Virus checker
24. Which one of the following is the most common internet protocol?
a) HTML
b)NetBEUI
c)TCP/IP
d)IPX/SPX
25. The term FTP stands for?
a) File transfer program
b)File transmission protocol
c)File transfer protocol
d)File transfer protection
26. Which one of the following is not a network topology?
a) Star
b)Ring
c)Bus
d)Peer to Peer
27. Which of the following is not an unit for data transfer rate?
a) MBPS
b)KBPS
c)SBPS
d)GBPS
28. This was the first network.
a) CSNET
b)NSFNET
c)ANSNET
d)ARPANET
29. A_______is a data communication system within a building, plant, orcampus, or between near by buildings.
a) MAN
b)LAN
c)WAN
d) None of the above
30._________________ is a collection of many separate networks
a) A MAN
b) An internet
c) A LAN
d) None of the above
31. A________is a set of rules that governs data communication.
a) forum
b) protocol
c) standard
d) None of the above
32. Which of the following is required to communication between two computers?
a) Communication hardware
b) Communications software
c) Protocol
d) All of above including access to transmission medium
33. Bluetooth is an example of
a) Wide area network
b) Virtual private network
c) Local area network
d) Personal area network
34. A device which can be connected to a network without using cable is called
a) Distributed device
b) Centralized device
c) Open-source device
d) Wireless device
35. The vast network of computers that connects millions of people all over the world is called
a) Internet
b) Hypertext
c) LAN
d) Web
36. MAC address is of ___________
a) 24 bits
b) 36 bits
c) 42 bits
d) 48 bits
37. Which of the following appears harmless but actually performs malicious functions such as deleting or damaging files.
a) WORM
b)Virus
c)Trojan Horse
d) Malware
38. Name the protocol that is used to send emails
a) FTP
b)SMTP
c)HTTP
d)TCP
39. Name the protocol that is used to receive emails
a) POP
b)VOIP
c)DHCP
d)FTP
40. Rajesh has purchased a new Smart TV and wants to cast a video from his mobile to his new Smart TV. Identify the type of network he is using:
a) LAN
b)MAN
c)WAN
d)PAN
41. The topology in which all nodes are individually connected to a central connection point:
a) Ring
b)Bus
c)Star
d)Tree
42. Which of the following best describes uploading information?
a) Sorting data on a disk drive
b)Sending information to a host computer
c)Receiving information from a host computer
d)Sorting data on a hard drive
43. The term IPv4 stands for?
a) Internet Protocol Version 4
b)Internet Programming Version 4
c)International Programming Version 4
d)None of these
44. In specific, if the systems use separate protocols, which one of the following devices is used to link two systems?
a) Repeater
b)Gateway
c)Bridge
d)Hub
45. DNS is the abbreviation of
a) Dynamic Name System
b) Dynamic Network System
c) Domain Name System
d) Domain Network Service
46. What is the meaning of Bandwidth in Network?
a) Transmission capacity of a communication channels
b) Connected Computers in the Network
c) Class of IP used in Network
d) None of Above
47. What does protocol defines?
a) Protocol defines what data is communicated)
b) Protocol defines how data is communicated)
c) Protocol defines when data is communicated)
d) All of above
48. Which of the following can be Software?
a) Routers
b) Firewalls
c) Gateway
d) Modems
49. The loss in signal power as light travels down the fiber is called)…………
a) Attenuation
b)Propagation
c) Scattering
d)Interruption
50. Which of the following TCP/IP protocols is used for transferring files form one machine to another.
a) FTP
b) SNMP
c) SMTP
d) RPC
51. Which of the following protocol is used for remote terminal connection service?
a) RARP
b) UDP
c) FTP
d) TELNET
52. Which of the following is considered as the unsolicited commercial email?M
a) Virus
b)Malware
c)Spam
d)All of the above
53. It can be a software program or a hardware device that filters all data packets coming through the internet, a network, etc) it is known as the_______:
a) Antivirus
b)Firewall
c)Cookies
d)Malware
54. The term “TCP/IP” stands for_____
a) Transmission Contribution protocol/ internet protocol
b)Transmission Control Protocol/ internet protocol
c)Transaction Control protocol/ internet protocol
d)Transmission Control Protocol/ internet protocol
55. Which of the following is a type of independent malicious program that never required any host program?
a) Trojan Horse
b) Worm
c)Trap Door
d)Virus
56. In order to ensure the security of the data/ information, we need to ____________ the data:
a) Encrypt
b)Decrypt
c)Delete
d)None of the above
57. Firewall is the type of ………..
a) Virus
b) Security threats
c) Worm
d) None of the above.
58. It allows a visited website to store its own information about a user on the user’s computer:
a) Spam
b)cookies
c)Malware
d)Adware
59. In which of the following switching methods, the message is divided into small packets?
a) Message switching
b) Packet switching
c) Circuit switching
d) None of these
60. Which of the following switch methods creates a point-to-point physical connection between two or more computers?
a) Message switching
b) Packet switching
c) Circuit switching
d) None of these
61. MAC address is also called ______.
a) Physical address
b)Logical address
c)Source address
d)Destination address
62. ARPANET stands for _______.
a) Advanced Recheck Projects Agency Internet
b)Advanced Recheck Projects Agency Network
c)Advanced Research Projects Agency Network
d)Advanced Research Projects Agency Internet
63. Which of the following devices is not a networking device?
a) Hub
b)Switch
c)Bridge
d)None of these
64. How many pins does RJ-45 contain?
a) Two
b)Four
c)Eight
d)Ten
65. NIC Stands for –
a) Network identity card
b)Network interface code.
c)National interface card
d)Network interface card
66. Which of the following is not a type of guided or wired communication channel?
a) Twisted Pair
b)Coaxial
c)Fibre Optic
d)WiMax
67. Which of the following is not a type of unguided or wireless communications channel?
a) Microwave
b) Radiowave
c) Ethernet
d) Sattelite
68. Which of the following wireless medium consists of a parabolic antena mounted on towers?
a) Sattelite
b)Radiowave
c)Microwave
d)Infrared
69. Which of the following cable consist of a solid wire core surrounded by one or more foil or wire shields?
a) Ethernet Cables
b)Coaxial Cables
c)Fibre Optic Cables
d)Power Cable
70. A collection of hyperlinked documents on the internet forms the ?
a) World Wide Web (WWW)
b)E-mail system
c)Mailing list
d)Hypertext
71. Protocols are set of rules to govern _________
a) Communication
b) Standard
c) Metropolitan communication
d) Bandwidth
72. An internet is a __________
a) Collection of WANS
b) Network of networks
c) Collection of LANS
d) Collection of identical LANS and WANS
73. Which protocol is commonly used to retrieve email from a mail server?
a) FTP
b) IMAP
c) HTML
d) TELNET
74. Which of the following allows user to view a webpage?
a) Operating System
b) Website
c) Interpreter
d) Internet Browser
75. A network router joins two _________ together?
a) Computers
b) Switches
c) Networks
d) Gateway
76. A network point that provides entrance into another network is called as ___________
a) Node
b) Gateway
c) Switch
d) Router
77. TELNET used _________ protocol for data connection
a) TCP
b) UDP
c) IP
d) DHCP
78. Google Chrome is example of :
a) Programming Language
b)Web Server
c)Protocol
d) Web Browser
79. Name the transmission media best suitable for connecting to hilly areas.
a) Co-axial Cable
b)Twisted pair
c) Microwave
d)Optical fiber.
80. Rahul wants to establish computer network in his cyber cafe, which of the following device will be suggested by you to connect each computer in the cafe?
a) Switch
b)Modem
c)Gateway
d)Repeater