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Summer
2016, ASSIGNMENT
PROGRAM
BCA (REVISED FALL 2012)
SEMESTER
3
SUBJECT
CODE & NAME BCA 3040– DATA COMMUNICATION
BK
ID B1644 CREDITS 4 MAXIMUM MARKS 60
Q1
What is Transmission Impairments? Briefly explain the problems challenged by
Transmission lines.
ANSWER
- Analog signal consist
of varying a voltage with time to represent an information steam. If the
transmission media were perfectly, the receiver could receive exactly the same
signal that the transmitter sent. But communication lines are usually not
perfect, so the receive signal is not the
Q2
Briefly explain the communication channel with an example
Answer - Communication channel means a
medium through which electrical signals can be transmitted. A communication
channel (or simply channel), refers either to a physical transmission medium
such
Q3
What is modulation? Explain why modulation is required?
Answer
-Modulation is the
process of varying one of characteristics (either amplitude or frequency or
Q4 Briefly explain Guided Transmission Media and its types.
Answer –
Transmission media is the physical path
between the transmitter and receiver. Physical media used for the actual data
transmission are grouped into two groups. They are:
a) Guided
QNO5 Briefly explain Nyquist theorem with mathematical representation.
Answer - The Nyquist theorem states that
“a signal must be sampled at least twice as fast as the bandwidth of the signal
to accurately reconstruct the waveform” In other words, the sampling frequency
Answer
- Congestion control is
concerned with controlling traffic entry into a
network, so as to avoid congestive collapse by attempting to avoid
oversubscription of any of the processing or link capabilities of the
intermediate nodes and networks and taking resource reducing steps, such as
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