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Task 1; The physical team: a) What is the purpose of twisting the cables in twis

ID: 3907002 • Letter: T

Question

Task 1; The physical team:
a) What is the purpose of twisting the cables in twisted pair cable?
b) Explain the advantages of optical fiber in relation to twisted pair and coaxial
cable.
c) What are the disadvantages of optical fiber as a transfer medium?
d) A line has a signal-to-noise ratio of 30dB and a bandwidth of 4000KHz.
What is the maximum data rate that this line can support?
e) Five channels, each with a bandwidth of 100KHz, must be multiplexed using FDM. What is the smallest bandwidth of the transmission channel if it is assumed that there is a need for a 10KHz guard band between channels to
prevent interference??

Explanation / Answer

Please Note: Please Post different posts for different Questions. According to Chegg Answering Policy, I have answered the first question here.

a) What is the purpose of twisting the cables in twisted pair cable?

Answer)

A twisted pair cable is a type of cabling in which 2 wires in a pair are put into insulated wires where there is a twisted pattern and they run in parallel throughout the wire. There are 2 types of twisted pairs cabling such as - unshielded twisted pair (UTP) and shielded twisted pair (STP). So now that we know what a twisted pair cable is, what is the purpose of this? The purpose of this twisted pair cabling is to reduce the effect of the electromagnetic noise on a signal. While using communication channels and lines there can be magnetic electronic interference from nearby cables carrying data or power and thus this is noise and cross-talk. Twisted pair cables help us reduce that by the process by which any interference which is affecting the one wire will also affect the other wire and thus the signal is read as a difference between the two which doesn't matter and thus the signal remains the same.

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