Question 1: (5 Marks)
Assume that you are working as an assistant network administrator in a company and assisting your network administrator in creating and maintaining networks for the company. You are assigned a task to analyze three different types of network media i.e. twisted pair cable, coaxial cable and fiber optic cable. You are required to fill the following table on the basis of your analysis.
|Cables||Attenuation (Less /High)||Bandwidth (Hz)||Distance (Limited / Long / Very Long )|
Question 2: (5 Marks)
According to the propagation of signals there are two types of signals i.e. Omni directional waves/signals and unidirectional waves/signals. In your opinion what is the difference between unidirectional and Omni directional waves and write at least two examples of unidirectional and Omni directional
Solution: Omnidirectionalwaves are propagated in all directions; unidirectional waves are propagated in one direction.
Question 3: (5 Marks)
Consider the following network in which a signal travels from point A to point G. At point A, the signal power is 100 W and at point G, the power is 80 W. You are required to calculate the decibel (dB) and identify whether the signal received at point G is attenuated or amplified?
at pt. G=P2=80W
dB = 10 log10 (P2/P1)
Substituting the values of P1 and P2 we get;
dB =10Log10 (80W/100W)
=10*(-0.09691) (Since: Log 0.8= -0.09691)
dB = -0.9691
Question 4: (5 Marks)
Some of the popular transmission applications/devices are given below. You are required to categorize these applications according to their respective wireless transmission waves.
|Applications||Radio waves/ Micro waves/ Infrared waves|
|FM Radio||Radio waves|
|Satellite networks||Micro waves|
|Remote control||Infrared waves|
|Cordless phones||Infrared waves|
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