Networking Concepts Test 2017

103 Test Questions:

1. What is the IEEE 802.5 standard related to?

Answers:

• Definition of the Logical Link Control (LLC) sublayer
• Token Ring
• Token Bus
• Ethernet

2. According to the OSI model, which layer performs encryption and decryption?

Answers:

• Application
• Presentation
• Session
• Data Link

3. What do you call a fibre optic cable in which the light signals follow a single path?

Answers:

• Multi mode
• Single mode
• Broadband
• Baseband

4. Which of the following protocols does not support Routing?

Answers:

• IPX/SPX
• TCP/IP
• NetBEUI

5. What is the full form of DSL?

Answers:

• Digital Subscription Line
• Digital Super Link
• Digital Speed Line
• Digital Subscriber Line

6. Which type of network uses dual fibre-optic rings?

Answers:

• Ethernet
• FDDI
• Token Ring
• ATM

7. Which protocol uses port number 23?

Answers:

• FTP
• SMTP
• Telnet
• HTTP

8. At which layer does a Bridge operate?

Answers:

• Network
• Physical
• Session
• Data Link

9. What do you call a fibre optic cable in which the light signals follow multiple paths?

Answers:

• Multi mode
• Single mode
• Broadband
• Baseband

10. According to the OSI model, which layer performs the function of transforming bits of data into electrical signals and sending those signals across the media?

Answers:

• Network
• Data Link
• Transport
• Physical

11. What do you call a communication system which uses start and stop bits to synchronize the sender and receiver?

Answers:

• Half Duplex
• Full Duplex
• Asynchronous
• Synchronous

12. Which of the following is mentioned in the correct sequence (from lowest layer to highest)?

Answers:

• Physical, Network, Data Link, Session, Transport, Presentation, Application
• Physical, Data Link, Network, Transport, Session, Presentation, Application
• Transport, Session, Data Link, Application, Presentation, Network, Physical
• Physical, Data Link, Network, Transport, Presentation, Session, Application

13. Which cabling media does not suffer from Electro-Magnetic Interference(EMI)?

Answers:

• Thin Coaxial Cable
• Thick Coaxial Cable
• Unshielded Twisted Pair Cable
• Fibre Optic Cable

14. What do you call a communication system which uses a clocking mechanism to synchronize the sender and receiver?

Answers:

• Half Duplex
• Full Duplex
• Asynchronous
• Synchronous

15. Which of the following ranges are reserved as private addresses?

Answers:

• 192.168.0.0 – 192.255.255.255
• 172.16.0.0 – 172.255.255.255
• 10.0.0.0 – 10.255.255.255
• 172.16.0.0 – 172.31.255.255

16. Old mainframe computers were an example of ______?

Answers:

• Distributed computing
• Client server computing
• Peer to peer computing
• Centralized computing

17. At which layer of the OSI model, does HTTP operate?

Answers:

• Application
• Transport
• Session
• Presentation

18. Which of the following is a disadvantage of Client Server networks?

Answers:

• They have poor security
• Data is not centrally organized
• Centralized administration is not possible
• They require high investment in the form of purchase of a server

19. Which cable used for RJ11 connectors?

Answers:

• Thin Coaxial Cable
• Thick Coaxial Cable
• Unshielded Twisted Pair Cable
• Telephone Cable

20. What is the speed of a E1 line?

Answers:

• 128 kbps
• 144 kbps
• 2.048 Mbps
• 1.544 Mbps

21. How many bits of the MAC address are used by OUI portion?

Answers:

• 32 bits
• 48 bits
• 24 bits
• 16 bits

22. What do you call a communication system in which data can be sent in both directions at the same time?

Answers:

• Half Duplex
• Full Duplex
• Asynchronous
• Synchronous

23. At which layer of the OSI model, does a World Wide Web browser operate?

Answers:

• Application
• Transport
• Session
• Presentation

24. Which of the following services is feasible using standard ISDN?

Answers:

• Fax
• Voice Telephony
• Data Transfer
• Video Conferencing
• All of the above

25. What is ATM (Asynchronous Transfer Mode)?

Answers:

• It is a WAN technology based on frequency division multiplexing that uses fixed size packets known as cells
• It is a WAN technology based on time division multiplexing that uses variable size packets
• It is a WAN technology based on time division multiplexing that uses fixed size packets known as cells
• It is a virtual circuit based WAN technology

26. What is the maximum speed supported by a standard ISDN BRI?

Answers:

• 64 kbps
• 128 kbps
• 256 kbps
• 1.544 mbps

27. Which media access technique does Ethernet use?

Answers:

• CSMA/CA
• CSMA/CD
• Tokens

28. What are PPP and SLIP most commonly used for?

Answers:

• Connecting to the Internet through DSL lines
• Connecting to the Internet through telephone lines
• Connecting to the Internet through fibre optic lines
• Connecting to the Internet using wireless modems

29. How is a unique MAC address assigned to a Network Card?

Answers:

• It is built into the card when the card is manufactured
• The network administrator must assign the address
• A unique address is automatically assigned when the card drivers are installed
• A unique address is automatically assigned whenver you boot up the computer

30. According to the OSI model, which layer performs compression and decompression?

Answers:

• Application
• Presentation
• Session
• Data Link

31. What is the full form of PPPoE?

Answers:

• Point to Point Protocol over Exchange
• Point to Point Password over Ethernet
• Point to Point Protocol over Ethernet
• None of the above

32. In a TCP/IP network, which of the following must be unique for each computer in the network?

Answers:

• IP address
• Subnet mask
• Default Gateway

33. For which layer of the OSI model has the Ethernet standard been defined?

Answers:

• Physical
• Data Link
• Network
• Transport
• Both a and b
• both b and c

34. In a TCP/IP network, which layers are basically absent?

Answers:

• Session, Presentation
• Transport, Session
• Session, Application
• Presentation, Application

35. What is the maximum number of valid IP addresses in a class B network?

Answers:

• 65536
• 65534
• 256
• 254

36. What is a checksum?

Answers:

• An error detection technique
• A network troubleshooting device
• Another name for protocol header
• Another name for protocol trailer

37. What is multiplexing?

Answers:

• Allowing multiple senders and receivers to share a single channel
• Allowing multiple senders and receivers to share a single media
• Allowing bi-directional communication

38. According to the OSI model, at which layer are network addresses assigned?

Answers:

• Session
• Data Link
• Presentation
• Network

39. According to the OSI model, which layer addresses the issue of network topologies (star, ring, bus etc)?

Answers:

• Network
• Data Link
• Transport
• Physical

40. What is the IEEE 802.3 standard related to?

Answers:

• Definition of the Logical Link Control (LLC) sublayer
• Token Ring
• Token Bus
• Ethernet

41. What is the maximum transmission speed of CAT 5 cable?

Answers:

• 10 Mbps
• 16 Mbps
• 100 Mbps
• 1000 Mbps

42. Which of the following is an ‘end-to-end’ layer?

Answers:

• Physical
• Data Link
• Network
• Transport

43. What is attenuation?

Answers:

• Distortion of the signal due to noise
• Distortion of the signal due to Electro Magnetic Interference
• Weakening of the signal in a cable over a distance
• Cross Talk

44. According to the OSI model, which layer performs parity checking and error checking?

Answers:

• Session
• Data Link
• Presentation
• Physical

45. What is the binary value of hex BF?

Answers:

• 10100000
• 10111111
• 11111000
• 00111011

46. Which layer of the OSI model corresponds to IP?

Answers:

• Network
• Physical
• Session
• Data Link

47. How many bearer (B) and data (D) channels are there in a standard ISDN BRI service?

Answers:

• 2B + 1D channel
• 16B + 1D channel
• 23B + 1D channel
• 24B + 2D channels

48. According to the OSI model, which layer is responsible for routing?

Answers:

• Session
• Data Link
• Presentation
• Network

49. At which layer of the OSI model, does FTP operate?

Answers:

• Application
• Transport
• Session
• Presentation

50. What is the purpose of twisting the pairs of cables together in a UTP cable?

Answers:

• To reduce attenuation
• To reduce cross talk
• To reduce Electro-Magnetic Interference
• To reduce noise

51. What is the IEEE 802.2 standard related to?

Answers:

• Definition of the Logical Link Control (LLC) sublayer
• Token Ring
• Token Bus
• Ethernet

52. Which layer is broken down into the MAC and LLC sublayers?

Answers:

• Network
• Data Link
• Session
• Physical

53. According to the OSI model, which layer addresses the issues of communication media and cable connectors etc?

Answers:

• Network
• Data Link
• Transport
• Physical

54. At which layer of the OSI model, does SMTP (Simple Mail Transfer Protocol) operate?

Answers:

• Application
• Transport
• Session
• Presentation

55. What do you call a medium which only allows a single channel?

Answers:

• Multi mode
• Single mode
• Broadband
• Baseband

56. Which layer of the OSI model corresponds to TCP?

Answers:

• Network
• Transport
• Session
• Data Link

57. What is the X.25 protocol?

Answers:

• It is a packet switching WAN protocol based on public data networks
• It is a packet switching WAN protocol based on public telephone networks
• It is a packet switching wireless LAN protocol
• It is a packet switching wireless WAN protocol

58. What is the purpose of the shielding in a Shielded Twisted Pair (STP) cable?

Answers:

• To reduce attenuation
• To reduce cross talk
• To reduce Electro-Magnetic Interference

59. What does CSMA/CA stand for?

Answers:

• Collision Sense Multiple Access/ Collision Avoidance
• Carrier Sense Multiple Access/ Collision Avoidance
• Carrier Sense Multiple Access/ Collision Arbitration
• Collision Sense Multiple Access/ Carrier Avoidance

60. What is the recommended maximum length(approx) for a segment of UTP cable?

Answers:

• 500m
• 1km
• 100m
• 180m

61. Which of the following is a Fiber Optic Connector?

Answers:

• RJ-11
• RJ-45
• MT-RJ
• None of the above

62. Which network topology does FDDI use?

Answers:

• Star
• Ring
• Bus
• Mesh

63. Which of the following is a disadvantage of Peer Networks?

Answers:

• They require high investment in the form of purchase of a server
• They require high investment in the form of purchase of a specialized network operating system
• They usually require a network administrator
• They have poor network security

64. According to the OSI model, which layer is responsible for sending acknowledgements?

Answers:

• Session
• Transport
• Data Link
• Presentation

65. At which layer of the OSI model, does a Proxy Server operate?

Answers:

• Application
• Transport
• Session
• Presentation

66. Which of the following is used as a high speed network backbone media?

Answers:

• Thin Coaxial Cable
• Thick Coaxial Cable
• Unshielded Twisted Pair Cable
• Fibre Optic Cable

67. According to the OSI model, which layer provides services such as file transfer, database access and email?

Answers:

• Application
• Presentation
• Session
• Data Link

68. Which of the following is false with regard to assymetric DSL?

Answers:

• It uses standard copper telephone cables
• It delivers much higher speeds than a serial modem
• It uses more channels for downloading data and fewer for uploading
• It employs analog modulation to deliver data from your PC to the telephone service provider

69. What is the binary value of hex 9F?

Answers:

• 10011111
• 10111000
• 11110001
• 10001111

70. Which one of the following devices breaks up a Broadcast Domain by default?

Answers:

• Hub
• Repeater
• Router
• Switch

71. What do you call a communication system in which data cannot be sent in both directions at the same time?

Answers:

• Half Duplex
• Full Duplex
• Asynchronous
• Synchronous

72. What does ISDN stand for?

Answers:

• Information Systems Digital Network
• Integrated Services Digital Network
• Internet Services Digital Network
• Internet Systems Data Network

73. How many twisted pairs does a UTP Cat 5 cable have?

Answers:

• 2
• 4
• 6
• 8

74. According to the OSI model, which layer addresses the issue of switching (packet switching, message switching etc)?

Answers:

• Session
• Data Link
• Presentation
• Network

75. What does CSMA/CD stand for?

Answers:

• Collision Sense Multiple Access/ Collision Detection
• Carrier Sense Multiple Access/ Collision Deterence
• Carrier Sense Multiple Access/ Collision Detection
• Collision Sense Multiple Access/ Carrier Detection

76. Which media suffers least from attenuation?

Answers:

• Thin Coaxial Cable
• Thick Coaxial Cable
• Unshielded Twisted Pair Cable
• Fibre Optic Cable

77. At which layer does a Hub operate?

Answers:

• Network
• Physical
• Session
• Data Link

78. According to the OSI model, which layer addresses the issue of connections (connection-oriented/ connection-less communication)?

Answers:

• Physical
• Data Link
• Network
• Transport

79. What is the speed of a T1 line?

Answers:

• 128 kbps
• 144 kbps
• 2.048 Mbps
• 1.544 Mbps

80. What do you call a medium which allows multiple channels?

Answers:

• Multi mode
• Single mode
• Broadband
• Baseband

81. Which protocol is connection oriented?

Answers:

• TCP
• IP
• UDP
• ICMP

82. Which of the following is a Class A network?

Answers:

• 172.0.0.0
• 126.0.0.0
• 192.0.0.0
• 225.0.0.0

83. Which cable uses RJ45 connectors?

Answers:

• Thin Coaxial Cable
• Thick Coaxial Cable
• Unshielded Twisted Pair Cable
• Shielded Twisted Pair Cable

84. At which layer does a Router operate?

Answers:

• Network
• Physical
• Transport
• Data Link

85. What is a token?

Answers:

• A part of the packet trailer in a token ring network
• A part of the packet header in a token ring network
• A special packet which travels from computer to computer in a token ring network

86. What are V.42, V.22, V.42bis?

Answers:

• IEEE standards
• Modem standards
• CCITT standards
• MAC addressing formats
• Digital Certificate formats

87. According to the OSI model, which layer breaks down the data into frames?

Answers:

• Network
• Data Link
• Transport
• Physical

88. Which network topology does Ethernet use?

Answers:

• Star
• Ring
• Bus
• Mesh

89. What is the speed of ISDN PRI service with 30B + 1D channel?

Answers:

• 2.048 Mbps
• 1.544 Mbps
• 144 Kbps
• 128 Kbps

90. Which type of connector is mostly used these days for connectivity with the network card?

Answers:

• RJ-11
• BNC
• RJ-45
• RJ-33

91. What is the purpose of the MAC sublayer?

Answers:

• Sending acknowledgements whenever packets are received
• Performing data compression
• Performing encryption and decryption
• Controlliing the way multiple devices share the same media

92. Which of the following cables can be used to connect a PC and a Hub?

Answers:

• Straight cable
• Cross cable
• Rollover cable
• Any of the above

93. What is the binary value of 157?

Answers:

• 11000111
• 10111001
• 11100011
• 10011101

94. According to the OSI model, at which of the following layers internet protocol (IP) addresses are assigned?

Answers:

• Session
• Data Link
• Presentation
• Network

95. Which of the following cables is used for the RJ11 connectors?

Answers:

• Thin Coaxial Cable
• Thick Coaxial Cable
• Unshielded Twisted Pair Cable
• Shielded Twisted Pair Cable

96. According to the OSI model, which layer handles the LAN switching?

Answers:

• Session
• Data Link
• Presentation
• both b and c

97. Which of the following cables can be used to directly connect two PCs if only one of the PC support AUTO-MIX?

Answers:

• Straight cable
• Cross cable
• Rollover cable
• Any of the above

98. Which of the following layer of the OSI model provide support for browsing World Wide Web?

Answers:

• Application
• Transport
• Session
• Presentation

99. According to the OSI model, which layer organizes data bits into small data units called frames?

Answers:

• Network
• Data Link
• Transport
• Physical

100. Which of the following devices breaks up a Broadcast Domain by default?

Answers:

• Hub
• Repeater
• Router
• Switch

101. According to the OSI model, which layer performs the encryption and decryption of data?

Answers:

• Application
• Presentation
• Session
• Network

102. Which of following network topologies can be used by Standard Ethernet and ThinNet Ethernet?

Answers:

• Star
• Ring
• Bus
• Mesh

103. Which of the following is the correct sequence of layers in OSI model (from lowest layer to highest)?

Answers:

• Physical, Network, Data Link, Session, Transport, Presentation, Application
• Physical, Data Link, Network, Transport, Session, Presentation, Application
• Transport, Session, Data Link, Application, Presentation, Network, Physical
• Physical, Data Link, Network, Transport, Presentation, Session, Application