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What is the difference between UTP and STP cables?

April 26, 2017cables difference STP UTP

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What is the difference between UTP and STP cables?

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UTP cable relies solely on the cancellation effect, produced by the twisted wire pairs, to limit signal degradation caused by EMI. To further reduce crosstalk between the pairs in UTP cable the number of twists in the wire pairs varies. UTP uses 100 ohm of resistance: whereas, STP generally has 150 ohms of resistance. ScTP, unlike UTP cabling, has a metallic braid or foil that adds additional protection against EMI.