WorksheetsComputer Networks Test-2
Total questions: 12
Worksheet time: 21mins
______________ is the process of converting binary data, a sequence of bits to a digital:
Masking
Multiplexing
Line Coding
Modulation
__________ are being carried; _______ are the carriers:
Signal Element, Data Element
Data Element, Signal Element
Signal, Data
Data, Signal
________ is the unit of data rate; ____________ is the unit of signal rate:
hertz, decibel
baud, bit per second (bps)
bit per second (bps), baud
decibel, hertz
For digital transmission:
bit rate < baud rate
bit rate > baud rate
bit rate <= baud rate
bit rate >= baud rate
A signal is carrying data in which one data element is encoded as one signal element (r=2). If
the bit rate is 400 kbps, what is the average value of the baud rate (in terms of baud) if c is between 0 and 1?
25k
50k
100k
150k
According to the Nyquist theorem, the sampling rate must be at least ______ times the highest
frequency contained in the signal:
1/2
2
N
1/N
In the waveform (a) given below, a bit stream is encoded by Manchester encoding scheme.
The same bit stream is encoded in a different coding scheme in wave form (b). The bit stream and
the coding scheme are
1000010111 and Differential Manchester respectively
0111101000 and Differential Manchester respectively
1000010111 and Integral Manchester respectively
0111101000 and Integral Manchester respectively
What is the result of applying the following schemes on sequence 11100000000000 using B8ZS encoding? Assume
that before the arrival of this signal, the non-zero signal level has been positive:
11100BV00BV000
11100VB00VB000
11100BV00VB000
11100VB00BV000
Calculate the bit rate (in bps) for 2000 baud with 16- QAM Modulation:
4000
500
8000
1600
Let the data rate of 128 QAM signal be 14 Kbps. Find the maximum bandwidth required to
transmit this signal if d=1.
(a)
On which principal of ray optics does fibre optic cable work?
Reflection of light
Refraction of light
Rarefaction of Light
Deflection of Light
Which unguided transmission media tecchnique is suitable for short communication?
Ground Propagation
Satellite Communication
Line of Sight Propagation
Sky Propagation
