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

2) The layer that defines the formats the data uses as it in transmitted on the communication line

3) Data is transmitted block by block in: .

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

5) A LAN protocol in which all computers and devices on the network pass a special signal known as:

6) Which layer is responsible to establish, maintain and terminate user connection

7) OSI reference model has:

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

9) What is another term for guided media?

10) Two dissimilar networks can be connected by a:

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

12) Which of the following is an internet protocol?

13) In a typical LAN, each computer on the network is connected through:

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

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

16) The second layer of OSI model is

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

18) Which of the following topology is used by Ethernet protocol?

19) DSL stands for

20) Which network covers a large area:

21) The process of transferring a file from remote computer to local computer on network is called

22) The ITU was formerly known as:

23) Computer transmit data in the form of codes.

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

25) The network that connects different campuses of a college in city is an example of:

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

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

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

29) Computer networks are the convergence of two important technologies

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

31) MAN stands for:

32) Segmentation and reassembly is the responsibility of:

33) ASCII code was.developed by:

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

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

36) Which of the following is NOT a category of network?

37) The most commonly used LAN protocol is:

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

39) Unicode uses:

40) People on LAN can share:

41) Many networks include a central computer called:

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

43) ISDN stands for:

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

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

46) How many modes of data communication are available?

47) A device that is used to connect two computers using telephone line is called:

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

49) The primary difference between a LAN and a WAN is:

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

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

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

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

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

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

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

57) A network that covers a large geographic distance such as a country is called a:

58) An important property of fiber optic cable is:

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

60) The_________layer is the layer closest to the transmission medium

61) Internet surfing is an example of:

62) Television and radio broadcasts are examples of:

63) Select unguided media from the following:

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

65) EBCDIC is a

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

67) Defacto means:

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

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

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

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

72) Mail services are available to network users through the_______layer.

73) LAN stands for:

74) Which of the following is the fastest communication mode

75) What type of network is the Internet?

76) In_______a node listens to bus for specified time and waits until node has completed transmission

77) The music and speech.represent:

78) The communication channels can be divided into_categories:

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

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

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

82) Star topology is less expensive than:

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

84) In WAN, the communication software that allows a personal computer to appear as terminal is call

85) Data link have two separate sub-layers known as:

86) The diameter of fiber optical cable is:

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

88) Bps is short for:

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

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

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

92) What is another term for unguided media?

93) Modem stands for:

94) An example of non-numerical data is:

95) Which problem occurs when two workstations on shared Ethernet try to access LAN at the same time

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

97) Which of the following is communications device

98) A LAN is a combination of:

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

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