1) Transmission from Earth to satellite is called:

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

3) Digital signals are commonly known as:

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

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

6) Data is transmitted block by block in: .

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

8) Analog signal is measured in:

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

10) IBM stands for:

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

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

13) ASCII code was.developed by:

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

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

16) Each set of bit pattern is called:

17) Which of the following is the fastest communication mode

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

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

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

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

22) Sound,light and radio waves are examples of

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

24) How many modes of data communication are available?

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

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

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

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

29) Bps is short for:

30) An advantage of synchronous over asynchronous transmission is:

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

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

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

34) Transmission media are usually categorized as_

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

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

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

38) Which of the following technique uses modulation?

39) Television and radio broadcasts are examples of:

40) How many characters can Unicode represcnt?

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

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

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

44) The communication channels can be divided into_categories:

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

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

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

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

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

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

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

52) What is another term for unguided media?

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

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

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

56) The music and speech.represent:

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

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

59) Unicode uses:

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

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

62) Select unguided media from the following:

63) Digital signal represents a sequence of values.

64) An example of non-numerical data is:

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

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

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

68) The diameter of fiber optical cable is:

69) Which of the following is NOT a coding scheme to represent data in computer?

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

71) Frequency is measured in:

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

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

74) What is another term for guided media?

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

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

77) Modem stands for:

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

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

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

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

82) The types.of signals can be:

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

84) BCD stands for:

85) EBCDIC is a

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

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

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

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

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

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

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

93) Internet surfing is an example of:

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

95) An important property of fiber optic cable is:

96) BCD code is a_

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

98) Computer transmit data in the form of codes.

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

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