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

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??

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