COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK TOPOLOGIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Electro Magnetic Interference (EMI)
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Fire
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Moisture
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None of the above
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Detailed explanation-1: -Shielding – A metallic layer surrounding the conductors to prevent electromagnetic interference within the cable and to devices outside the cable.
Detailed explanation-2: -A braided shield protects the signal from EMI interference. When looking at cable specs, the braided shield will often be expressed in a percent coverage, which often ranges anywhere from 30% to 95% coverage. The higher the coverage, the better the protection.
Detailed explanation-3: -Coaxial wires have a reasonably good natural resistance to external noise, due to the physical symmetry of the signal current conductor and the returning current conductor (the concentric shield). This symmetry eliminates, to first order, all consequences of external electromagnetic fields.