1) EBCDIC is a

2) Digital signals are commonly known as:

3) Internet surfing is an example of:

4) .Which transmission type transmits data one character at a time

5) signal is a continuous electrical signal in the form of wave.

6) A fiber-optic cable’s core is measured in:

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

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

9) The time taken by a data signal to reach to moon and then back to earth was about:

10) Television and radio broadcasts are examples of:

11) The’transmission in which data can be received and. sent simultaneously is called:

12) Which of the following coding schemes uses 4-bit code?

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

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

15) IBM stands for:

16) Which of the following devices uses parallel transmission?

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

18) The diameter of fiber optical cable is:

19) The internal transfer of binary data in a computer uses mode.

20) Each set of bit pattern is called:

21) The electromagnetic or light waves representing data are called:

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

23) A type of communication that sends that uses a clock to control timing of bits being sent is called:

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

25) Satellite transmission stations that can both send and receive messages are called:

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

27) The signals produced by a computer to send over phone line must be converted to:

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

29) Computer transmit data in the form of codes.

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

31) Frequency is measured in:

32) An important property of fiber optic cable is:

33) Which of the following technique uses modulation?

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

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

36) The communication channels can be divided into_categories:

37) Data is transmitted block by block in: .

38) An example of non-numerical data is:

39) How many devices can exist between a sending and receiving host?

40) A type of communication that sends data using flow control to synchronize data between sender

41) Which communication technique can transmit the data over long distance?

42) Which is the most secure type of transmission medium?

43) Which of the following features is provided with a modem?

44) What is another term for guided media?

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

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

47) Which of the following code can represent up to 65,536 symbols?

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

49) Which of the following is the fastest communication mode

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

51) Unicode uses:

52) Transmission from Earth to satellite is called:

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

54) The medium in which signals travel through a cable or wire is called:

55) How many characters ASCII 8-bit code can represent?

56) BCD stands for:

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

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

59) Which medium transmits voice and data via air as high-frequency radio waves?

60) Transmission from a satellite to its earth-based station is called:

61) Which of the following can severally affect the quality of satellite transmission?

62) The mode that is like a two way street with traffic flowing in both direction at the.same time is ca

63) The computers in wide geographical area can be efficiently connected by:

64) Which of the following is the insulation on a fiber-optic cable?

65) BCD code is a_

66) A modem allows computers to access other computers through following types of connection

67) Transmission media are usually categorized as_

68) The process of converting a digital signal to an analog signal is called:

69) Digital signal represents a sequence of values.

70) An advantage of synchronous over asynchronous transmission is:

71) Which value in start bit indicates that the transmission line is idle?

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

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

74) Bps is short for:

75) Select unguided media from the following:

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

77) Which type of modem can be added to the system unit through expansion slot?

78) The transmission rate of modem can be measured in:

79) How many modes of data communication are available?

80) Which multiplexing technique shifts each signal to a different carrier frequency?

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

82) The height of wave within a given period of time is known as:

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

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

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

86) The types.of signals can be:

87) Analog signal is measured in:

88) Which transmission allows data to travel in one direction at a time?

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

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

91) What is another term for unguided media?

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

93) How many characters can Unicode represcnt?

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

95) Modem stands for:

96) The music and speech.represent:

97) How many characters ASCII 7-bit code can represent?

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

99) The typical fiber optic cable consists of very narrow strand of glass called:

100) Sound,light and radio waves are examples of