Question

Computer Networks IT 210
Please Use your own words .
sorry No handwriting
no copy paste
Noise is one of the causes of transmission impairment. There are several types of noise, mention three and explain them briefly in your own words.
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Answer 1

Solution for the problem is provided below, please comment if any doubts:

Noise:

• Noise is the external agents producing unwanted signals that can interfere with the communication process and it will cause transmission impairment. The noise will results in error in communication and the higher level of noise will results in communication failure also.

There are many types of noises can be identified in the communication scenario, important three are:

1. Environmental noise:
   • The noise that generated from common physical features and environmental factors.
   • The sounds that generated from vehicle traffic, environmental features like rain, thunderstorm, noise from industries, etc. are of higher intensity in nature. So it can interfere with the communication media. These will results in the error or halt in communication.
   • These types of noise can be reduced by providing well insulated transmission media.
2. Cross communication noise:
   • The communication or transmission media may not be of dedicated channels, thus the same communication channel may be used by multiple parties at same time. Some distinguishing mechanisms like frequency are used to distinguish each communications separately.
   • But this communication scenario is susceptible to cross communication, one communication fragments can be merged with another communication. This will affect the communication process. It is called cross communication noise. The cross talk in land phones is a common example of cross communication noise.
3. Internal source noise:
   • The communication devices composed of many components like transistors, inductors, resistors, etc. These components can produce a unwanted noise when it working.
   • Since the noise is produced internally a small magnitude can also results in higher impact on communication.
   • When the components are heated or working in a more frequency than the normal usage an results in the internal source noise.