Which of the following is a false reason for parallel lines not being used for long distances?(a) Cost factor(b) Signal Attenuation(c) Number of transmission channels(d) Low speedI had been asked this question in an interview for job.Enquiry is from Parallel and Serial Transmission in portion Digital Communication Techniques of Avionics

Which of the following is a false reason for parallel lines not being

1.	Which of the following is a false reason for parallel lines not being used for long distances?(a) Cost factor(b) Signal Attenuation(c) Number of transmission channels(d) Low speedI had been asked this question in an interview for job.Enquiry is from Parallel and Serial Transmission in portion Digital Communication Techniques of Avionics
Answer» Correct answer is (d) Low speed For EXPLANATION I would say: One of the major DISADVANTAGES of USING parallel transmission for long distance is that laying the data bus is costly. To cover a distance of 10km for an 8 bit system, we need a cable of 80km LENGTH. Parallel data are usually faster than serial since all the bits are transmitted simultaneously.

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