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Module 1: Physical Layer & Data Communication

20172m

What is the significance of the twisting in twisted-pair cable?

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Answer

Twisting the conductors in a twisted-pair cable helps reduce electromagnetic interference (EMI) and crosstalk.

Each pair is twisted so that external interference affects the conductors in a more balanced way. The twisting also reduces the amount of electromagnetic radiation coupled between adjacent pairs.

Exam-ready

The twisting of wires reduces noise, electromagnetic interference, and crosstalk, improving the reliability of data transmission.

For 2 marks: Mention reduction of EMI/crosstalk and improved signal quality.

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