Question

What is the need of line coding in computer networks?

Answer 1

Line Encoding is the method by which analog/digital data is converted into analog/digital electromagnetic signals for transmission via. wired/wireless transmission links.

Answer 2

Line Coding is a special coding system chosen to allow transmission to take place in a communications system. The chosen code or pattern of voltage used to represent binary digits on a transmission medium is called line encoding.

The types of line encoding are polar, unipolar and bipolar.

The polarity of a code can be positive or negative or in certain cases an idle line can be incorporated into the code.

Line encoding takes place at the physical layer of the OSI mode.

It is used for converting digital data into digital signal and hence helps in loss of data due to overlap and distortion.

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