Computer Network || Multiple Choice Questions || 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 these is not an example of unguided media?
(a) Optical Fibre Cable
(b) Radio wave
(c) Bluetooth
(d) Satellite
8. In which topology are all the nodes connected through a single Coaxial cable?
(a) Star
(b) Tree
(c) Bus
(d) Ring
9. Which of the following is the smallest network?
(a) WAN
(b) MAN
(c) LAN
(d) Wi-Fi
10. Which protocol is used for the transfer of hypertext content over the web?
(a) HTML
(b) HTTP
(c) TCP/IP
(d) FTP
11. 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 mentioned
12. 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
13. Central Computer which is powerful than other computers in the network is called as _____.
(a) Client
(b) Server
(c) Hub
(d) Switch
14. Network in which every computer is capable of playing the role of a client, or a server or both at same time is called
(a) peer-to-peer network
(b) local area network
(c) dedicated server network
(d) wide area network
15. In peer-to-peer network, each computer in a network is referred as
(a) server
(b) client
(c) peer
(d) sender
16. 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
17. Which type of transmission media is the least expensive to manufacture?
(a) Coaxial
(b) Twisted pair cable
(c) CAT cable
(d) Fiber optic
18. Which of these components is internal to a computer and is required to connect the computer to a network ?
(a) Wireless Access Point
(b) Network Interface card
(c) Switch
(d) Hub
19. A device that forwards data packet from one network to another is called a
(a) Bridge
(b) Router
(c) Hub
(d) Gateway
20. Which of the following is the fastest media of data transfer?
(a) Co-axial Cable
(b) Untwisted Wire
(c) Telephone Lines
(d) Fiber Optic
21. Hub is a
(a) Broadcast device
(b) Uni-cast device
(c) Multi-cast device
(d) None of the above
22. Switch is a
(a) Broadcast device
(b) Uni-cast device
(c) Multi-cast device
(d) None of the above
23. The device that can operate in place of a hub is a :
(a) Switch
(b) Bridge
(c) Router
(d) Gateway
24. A repeater takes a weak and corrupted signal and _____ it.
(a) Amplifies
(b) Regenerates
(c) Resembles
(d) Reroutes
25. Which of the following is not a type of cloud?
(a) Private
(b) Public
(c) Protected
(d) Hybrid
26. Which of the following is correct statement for IoT?
(a) It is a collection of networks
(b) It is a collection of protocols
(c) It is network of physical objects or "things" embedded with chips, sensors etc.
(d) None of these
27. Protocols are
(a) Agreements on how communication components and devices are to communicate
(b) Logical communication channels for transferring data
(c) Physical communication channels used for transferring data
(d) None of above
28. In computer, converting a digital signal in to an analog signal is called
(a) modulation
(b) demodulation
(c) conversion
(d) transformation
29. In computer, process of superimposing a low frequency signal over a high frequency signal is called
(a) modulation
(b) demodulation
(c) frequency modulation
(d) amplitude modulation
30. In computer, process of superimposing the amplitude of message signal over amplitude of carrier signal is called
(a) modulation
(b) demodulation
(c) frequency modulation
(d) amplitude modulation
31. Find EVEN parity bit for 10010001
(a) 0
(b) 1
(c) 2
(d) none of these
32. Find ODD parity bit for 10010110
(a) 0
(b) 1
(c) 2
(d) none of these
33. Traditionally, Internet checksum is
(a) 8-bit
(b) 16-bit
(c) 24-bit
(d) 32-bit
34. If value of checksum is 0, then message is
(a) accepted
(b) rejected
(c) sent back
(d) resend
35. Checksums use _____ arithmetic.
(a) two's complement arithmetic
(b) one's complement arithmetic
(c) either (@) or (b)
(d) none of the above
36. The checksum of 0000 and 0000 is _____.
(a) 1111
(b) 0000
(c) 1110
(d) 0111
37. Protocol/Standard that is used to transfer data among computers on the Internet
(a) FTP
(b) Archie
(c) TCP
(d) Gopher
38. A firewall is
(a) An established network performance reference point.
(b) Software or hardware used to secure/guard a private network from a public network.
(c) A virus that infects macros.
(d) A predefined encryption key used to encrypt and decrypt data transmissions.
39. Which multiple access technique is used by IEEE standard for wireless LAN?
(a) ALOHA
(b) CSMA/CA
(C) CDMA
(d) none of the mentioned
40. Which data communication method is used to transmit the data over a serial communication link?
(a) Simplex
(b) Half-duplex
(c) Full duplex
(d) All of above
41. Which of the following is not the possible ways of data exchange?
(a) Simplex
(b) Multiplex
(c) Half-duplex
(d) Full-duplex
42. Routing tables of a router keeps track of
(a) MAC Address Assignments
(b) Port Assignments to network devices
(c) Distribute IP address to network devices
(d) Routes to use for forwarding data to its destination
43. What is the address size of IPv4?
(a) 32 bit
(b) 64 bit
(c) 128 bit
(d) 256 bit
44. What is the address size of IPv6?
(a) 32 bit
(b) 64 bit
(c) 128 bit
(d) 256 bit
45. For wired networks, which protocol is used for handling collisions?
(a) CSMA
(b) CSMA/CD
(c) CSMA/CA
(d) All of these
46. For wireless networks, which protocol is used for handling collisions?
(a) CSMA
(b) CSMA/CD
(c) CSMA/CA
(d) All of these
47. What factors should be considered when selecting the appropriate cable for connecting a PC to a network? (Choose two)
(a) type of system bus
(b) motherboard model
(c) distance of cable run
(d) speed of transmission
(e) computer manufacturer
48. What are two advantages of using UTP cable in a networking environment? (Choose two)
(a) is stiffer than STP
(b) is less expensive than fiber
(c) is easier to install than coaxial
(d) provides longer distances than coaxial provides
(e) is less susceptible to outside noise sources than fiber is
49. Which cable connectors are used to connect a cable from a router's console port to a PC?
(a) RJ-11
(b) RJ-12
(c) RJ-45
(d) none
50. What are two advantages of using fiber-optic cabling instead of UTP ? (Choose two.)
(a) lower cost
(b) easier to install
(c) allows longer distances
(d) less effected by external signals
(e) easier to terminate the cable ends
51. Which network topology requires a central controller or hub ?
(a) Star
(b) Bus
(c) Mesh
(d) Tree
52. Which topology requires a multipoint connection on a single cable?
(a) Star
(b) Bus
(c) Mesh
(d) Tree
53. Which of the following topologies contains a backbone cable running through the whole length of the network?
(a) Star
(b) Bus
(c) Mesh
(d) Tree
54. Which of the following devices can be used at the centre of a star topology?
(a) Router
(b) Repeater
(c) Modem
(d) Hub
55. If a computer connected to a star topology fails, the entire network will _____.
(a) also fail
(b) work unaffectedly
(c) only server will work
(d) none of these
56. A combination of bus and star topologies is called a _____ topology.
(a) Combination
(b) Hybrid
(c) Mesh
(d) Tree
57. Internet is an example of _____ topology.
(a) Star
(b) Bus
(c) Mesh
(d) Bus
58. Data is converted in a form so as to travel over telephone lines using this device.
(a) Modem
(b) Hub
(c) Switch
(d) Router
59. Network device that regenerates and retransmits the whole signal is _____.
(a) Modem
(b) Hub
(c) Repeater
(d) Bridge
60. Network device which connects networks of similar types (same protocols).
(a) Hub
(b) Router
(c) Bridge
(d) Gateway
61. Network device which connects dissimilar networks (different protocols).
(a) Hub
(b) Router
(c) Bridge
(d) Gateway
62. Networks devices that sends the data over optimizing paths through connected hops is
(a) Hub
(b) Router
(c) Bridge
(d) Gateway
63. A web-site is a collection of
(a) HTML documents
(b) Graphic files
(c) audio and video files
(d) all the above
64. The first page that you normally view at a web site is its :
(a) Home page
(b) Master page
(c) First page
(d) Banner page
65. When you visit a website, it will open the page set as _____ of the website.
(a) Web Site
(b) Home page
(c) Email
(d) ISP?
66. The first page on a website that allows you to navigate to other pages via menu system or links, is known as
(a) front page
(b) primary page
(c) home page
(d) first page
(e) main page
67. IP stands for
(a) Internet Protocol
(b) Intranet Protocol
(c) Internet Provider
(d) Internet Package
68. URL stands for
(a) Universal Resource Locator
(b) Uniform Resource Location
(c) Uniform Resource Locator
(d) None of the above
69. Which of these is not a part of URL?
(a) IP address
(b) Port Number
(c) Domain Name
(d) None of these
70. Which portion of the URL below records the directory or folder of the desired resource ?
http://www.somestore.com/firstfloor/shoes.htm
(a) http
(b) firstfloor
(c) shoes.htm
(d) www.somestore.com
71. In URL, http://www.pacein.com/pr/main.htm, which component identifies the protocol or type of
the server ?
(a) http
(b) www.pacein.com
(c) /pr/main.htm
(d) none
72. In URL, http://www.pacein.com/pr/main.htm, which component identifies the web-site ?
(a) http
(b) www.pacein.com
(c) /pr/main.htm
(d) none.
73. In URL, http://www.pacein.com/pr/main.htm, which component identifies the path of a web page?
(a) http
(b) www.pacein.com
(c) /pr/main.htm
(d) none.
74. URLs are of two types:
(a) Absolute & Relative
(b) Static & Dynamic
(c) Absolute & Dynamic
(d) None of the above
75. An email can be sent via,
(a) PC
(b) Tablet
(c) Smart phone
(d) All of the above
76. In an email address, the characters following '@' character represent
(a) User name
(b) E-mail Recipient
(c) Domain name
(d) None of these
77. _____ field of email-compose box allows to send same message to multiple recipients without getting them know about other recipients.
(a) cc
(b) To
(c) bcc
(d) Message.
78. Chatting on Internet is
(a) Talking face to face
(b) Talking on phone
(c) Online textual talk
(d) None of these
79. A _____ room or online forum allows users to communicate through typed messages which are displayed almost instantly.
(a) Mail
(b) Buddy
(c) Chat
(d) Message
80. Online textual talk is called _____.
(a) Video Conferencing
(b) Telephony
(c) Text Phone
(d) Chat
81. Electronic mail cannot be used for
(a) Sending documents
(b) Sending bulk data (say over 2GB)
(c) Sending attachments
(d) Sending message
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