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

2) Computer transmit data in the form of codes.

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

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

5) The types.of signals can be:

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

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

8) Select unguided media from the following:

9) Internet surfing is an example of:

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

11) Data is transmitted block by block in: .

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

13) Bps is short for:

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

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

16) Which of the following is the fastest communication mode

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

18) Transmission media are usually categorized as_

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

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

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

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

23) BCD stands for:

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

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

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

27) What is another term for unguided media?

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

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

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

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

32) Analog signal is measured in:

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

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

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

36) ASCII code was.developed by:

37) Digital signal represents a sequence of values.

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

39) BCD code is a_

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

41) An important property of fiber optic cable is:

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

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

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

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

46) Digital signals are commonly known as:

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

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

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

50) Each set of bit pattern is called:

51) What is another term for guided media?

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

53) Which of the following technique uses modulation?

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

55) Frequency is measured in:

56) Modem stands for:

57) Transmission from Earth to satellite is called:

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

59) The music and speech.represent:

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

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

62) Sound,light and radio waves are examples of

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

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

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

66) Which of the following devices uses parallel transmission?

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

68) Unicode uses:

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

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

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

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

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

74) How many modes of data communication are available?

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

76) The communication channels can be divided into_categories:

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

78) Television and radio broadcasts are examples of:

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

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

81) EBCDIC is a

82) How many characters can Unicode represcnt?

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

84) An example of non-numerical data is:

85) The diameter of fiber optical cable is:

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

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

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

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

90) IBM stands for:

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

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

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

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

95) An advantage of synchronous over asynchronous transmission is:

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

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

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

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

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