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Fall 2009
CS601- Data Communication
Question No: 1 ( Marks: 1 ) - Please choose one
An unauthorized user is a network ___________ issue.
► Performance
► Reliability
► Security
► All of the given
Question No: 2 ( Marks: 1 ) - Please choose one
Which is not an element of protocol
► semantics
► timing
► communication service module
Question No: 3 ( Marks: 1 ) - Please choose one
_______ is a multipoint topology.
► Ring
► Mesh
► Tree
► Bus
Question No: 4 ( Marks: 1 ) - Please choose one
Unidirectional traffic movement is overcome by dual ring technology.
► True
► False
Question No: 5 ( Marks: 1 ) - Please choose one
Physical layer define characteristics of interface between device and _________
► transmission medium
► another device
► another peer physical layer at other side
► modem
Question No: 6 ( Marks: 1 ) - Please choose one
________ layer deals with syntax and semantics of information exchange.
► presentation
► session
► application
► physical
Question No: 7 ( Marks: 1 ) - Please choose one
To allow access to network resources is the function of ___________
► application layer
► physical layer
► network layer
Question No: 8 ( Marks: 1 ) - Please choose one
Time domain plot show changes in signal phase with respect to time.
► True
► False
Question No: 9 ( Marks: 1 ) - Please choose one
In 8QAM each signal shift or one baud represents ______.
► 4 bits
► 2 bits
► 5 bits
► 3 bits
Question No: 10 ( Marks: 1 ) - Please choose one
Modulation of an analog signal can be accomplished through changing the ___________ of the carrier signal.
► amplitude
► frequency
► phase
► all of the given
Question No: 11 ( Marks: 1 ) - Please choose one
EIA 449 provides much better functionality than EIA ________
► 232
► 223
► 262
► 222
Question No: 12 ( Marks: 1 ) - Please choose one
Which of the following is an example of ITU-T modem standards:
► T-series
► X-series
► N-series
► V-series
Question No: 13 ( Marks: 1 ) - Please choose one
Traditional modems are wide spread now to a data rate of __________.
► 56 Kbps
► 72 Kbps
► 42 Kbps
► 96 Kbps
Question No: 14 ( Marks: 1 ) - Please choose one
In case of uploading at the switching station, data is converted to digital signal using ___________.
► TCP
► PCM
► ICP
► TDM
Question No: 15 ( Marks: 1 ) - Please choose one
The RG number gives us information about ________.
► Twisted pairs
► Coaxial cables
► Optical fibers
► all of the given
Question No: 16 ( Marks: 1 ) - Please choose one
The _________ is an association that sponsors the use of infrared waves.
► IrDA
► EIA
► FCC
► PUD
Question No: 17 ( Marks: 1 ) - Please choose one
Optical fibers are defined by the ratio of the ___________ of their core to the diameter of their cladding.
► Diameter
► Radius
► Length
► Width
Question No: 18 ( Marks: 1 ) - Please choose one
The section of EM spectrum defined as Radio Communication is divided into _____ ranges called BANDS.
► 8
► 10
► 5
► 6
Question No: 19 ( Marks: 1 ) - Please choose one
Radio wave transmission utilizes ___________ different types of propagation.
► Four
► Three
► Two
► Five
Question No: 20 ( Marks: 1 ) - Please choose one
The VLF and LF bands use _________ propagation for communications.
Sponsored Links
► Ground
► Sky
► Line of sight
► Space
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