CS 601 Data Communication
Question No: 1 (Marks: 1) - Please choose one
Which one best describes the given statement:
"To allow multiple users to share total capacity of a transmission medium"
► Congestion control
► Exchange management
► Multiplexing
Question No: 2 (Marks: 1) - Please choose one
Transmitting passwords is the responsibility of
► Communication service module
► Network access module
► File transfer application
Question No: 3 (Marks: 1) - Please choose one
Line configuration refers to the way two or more devices attach to a ______.
► Link
► Circuit
► Route
► Node
Question No: 4 (Marks: 1) - Please choose one
Secondary hub in a tree must be a passive hub.
► True
► False
Question No: 5 (Marks: 1) - Please choose one
In mesh topology, if there are five nodes then there will be _______ links.
► 5
► 10
► 15
► 20
Question No: 6 (Marks: 1) - Please choose one
Line configuration is the function of ____________ layer
► Data link
► Network
► Physical
► Transport
Question No: 7 (Marks: 1) - Please choose one
Data link layer deals with mechanical and electrical specifications of transmission medium and
Interface
► True
► False
Question No: 8 (Marks: 1) - Please choose one
Session layer is responsible for segmentation and reassembly.
► True
► False
Question No: 9 (Marks: 1) - Please choose one
A signal that repeats a pattern over a regular interval of time is called_______.
► Periodic signal
► Analog signal
► Composite signal
Question No: 10 (Marks: 1) - Please choose one
Signal can be controlled by three attributes: Amplitude, frequency and _______.
► Phase
► Time
► Wavelength
Question No: 11 (Marks: 1) - Please choose one
Frequency band in which 99% of the total power resides is called_______
► Power bandwidth
► Half power bandwidth
► 3dB bandwidth
► F.M.
Question No: 12 (Marks: 1) - Please choose one
The amplitude of a digital signal depends upon the________ to represent a bit.
► Phase
► Voltage
► Wavelength
Question No: 13 (Marks: 1) - Please choose one
DC component is also termed as Direct current component or a component with non-zero
Frequency.
► False
► True
Question No: 14 (Marks: 1) - Please choose one
The last process in PCM is _________ digital data into digital signal.
► encoding
► decoding
► modulating
Question No: 15 (Marks: 1) - Please choose one
The powerful carrier signal is called as the___________
► Carrier frequency
► Base signal
► Carrier frequency and base signal
► None of given
Question No: 16 (Marks: 1) - Please choose one
In 8QAM each signal shift or one baud represents ______.
► 4 bits
► 2 bits
► 5 bits
► 3 bits
Question No: 17 (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: 18 (Marks: 1) - Please choose one
In ____________ transmission the timing of the signal is unimportant.
► Asynchronous
► Synchronous
► Polar
► Bi-polar
Question No: 19 (Marks: 1) - Please choose one
In _____________ transmission, bits are transmitted simultaneously, each across its own wire.
► Asynchronous serial
► Synchronous serial
► Parallel
► Asynchronous & Synchronous serial
Question No: 21 (Marks: 1) - Please choose one
In _____________ transmission, bits are transmitted over a single wire, one at a time.
► Asynchronous serial
► Synchronous serial
► Parallel
► Asynchronous & Synchronous serial
Question No: 22 (Marks: 1) - Please choose one
In _____________ transmission, a start bit and a stop bit frame a character byte.
► Asynchronous serial
► Synchronous serial
► Parallel
► Asynchronous & Synchronous serial
Question No: 23 (Marks: 1) - Please choose one
A ______________ converts an analog signal into a digital signal.
► Demodulator
► Modulator
► Digital-to-analog converter
Question No: 24 (Marks: 1) - Please choose one
_________ requires more bandwidth.
► FSK
► ASK
► PSK
► QAM
Question No: 25 (Marks: 3)
Why we need a Null Modem?
Question No: 26 (Marks: 5)
Describe different types of NRZ encoding scheme?
Question No: 27 (Marks: 10)
Describe functions of each layer of OSI Model briefly?
