1) All of the following are elements of data communication system EXCEPT:

2) Which of the following consists of thin glass to transmit beams of light?

3) A device that connect multiple network using similar or different protocol is:

4) EBCDIC is a

5) A set collection of a large number of computers all over the world connected to one another is

6) The number of frequencies that can fit on a link at one time is called:

7) The message sent on a ____ network can take any of several possible paths from source to destination

8) Which modem is used to transmit data signals through air instead of cable?

9) Which of the following is a governing body to approve the network standards?

10) An important property of fiber optic cable is:

11) Which of the following is a De Facto standard?

12) The act of listening to the medium for a message is called:

13) OSI stands for:

14) Which of the following type of data is used to display actions and movement?.

15) The music and speech.represent:

16) NIC stands for:

17) 50.This type of transmission is sometimes called start/stop transmission

18) The diameter of fiber optical cable is:

19) OSI reference model has:

20) Frequency is measured in:

21) Which of the following technique uses modulation?

22) The layer that is concerned with addressing and routing is called:

23) The conversation over a walkie-talkie radio is-an example of:

24) A computer network in which all computers have equal status and no one have control over others:

25) The topology used for a small number of computers is called:

26) De Jure means

27) IBM stands for:

28) Cabling on a linear bus topology can be extended using which of following?

29) All of the following are guided communications media EXCEPT:

30) One or more computers connected to a hub is called:

31) ASCII code was.developed by:

32) code is 7-bit or.8-bit code.

33) Digital signals are commonly known as:

34) The layer is used to control how a bit-streams of data is sent and received over physical medium

35) Full-duplex communication is made. possible by the.devices known as:

36) Defacto means:

37) Digital signal represents a sequence of values.

38) Ethernet, Token bus and Token Ring have been defined by:

39) Project 802 defines standard for which layers of the OSI model:

40) Which of the following consists of two insulated copper wires twisted together?

41) Bps is short for:

42) A network that places all nodes on a single cable is called:

43) Transmission that is used without timing signal is called:

44) Terminal is a:

45) The number of times a wave repeats during a specific time interval is called

46) A collection of computers connected together to share resources and informal called:

47) LAN does not use:

48) The chart,graph,pictures and freehand drawing are examples of:

49) Which of the following converts digital signals to analog and analog to digital?

50) Most data .transmitted over telephone lines uses:.

51) Layer that is responsible for transferring frames is

52) The network architecture that allows every computer to act as client as well as a server is:

53) Modem stands for:

54) The companies that use networks can save time and money because network allow users to share:

55) Which one is NOT a De-jure standard?

56) Typically, data transfer rate in LAN are of the order of:

57) Which of the following cables consists of a single core of solid copper?

58) The process of transferring data electronically from one place to another is caled

59) Which type of data consists of words,sentences and paragraphs?

60) Mobile phone(Cellular) systems often use:

61) Segmentation and reassembly is the responsibility of:

62) Which of the following is not a communication media?

63) A computer network must contain at least number of computers:

64) The set of rules to exchange data in a communications network is called:

65) Which of the following is not a:data communication mode?

66) Which of the following devices uses parallel transmission?

67) What is another term for unguided media?

68) Which of the following coding schemes primarily.used by IBM?

69) Which protocol works on the concepts of ring topology and a token?

70) Which kind of signal is mostly required by telephone lines?

71) The types.of signals can be:

72) A collection of related web pages is called:

73) Sound,light and radio waves are examples of

74) FTP facility is used to:

75) The layer that is in between of session and application layer is

76) What binary bits are used to encode digital data?

77) The process of converting analog to digital signal is known as:

78) In star topology, the central device is called:

79) Data link layer lies between the physical layer and the_______layer

80) A set collection of a large number of computers all over world connected to one another is called

81) A lab with twenty computers and a laser printer is an example_____ of area network

82) Many networks include a central computer called:

83) Which communications medium requires line-of-sight?

84) Which LAN access method resolves the contention between two or more nodes by collision detection

85) A network that covers a limited geographic distance such as an office is called:

86) Each computer on a network is called a:

87) The technology of long-distance communication is known as:

88) How many pairs of computers can simultaneously communicate on Ethernet LAN?

89) In the OSI model, encryption and decryption are functions of the________?

90) NIC allows direct connection to:

91) Physical path that connects the source and receiver is known as:

92) Which of the following transmission media is used in LAN?

93) A telephone conversation is’an example of:.

94) A device used to connect similar networks is called:

95) Start/stop bits are not required in this type of transmission.

96) The services on the Internet include

97) In _________topology, the entire network goes down if the backbone cable fails

98) Star topology is less expensive than:

99) The physical layout of a network is known as:

100) Which of following protocols are properly researched, designed and finally published as a standard?