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What are some of the characteristics of shielded twisted-pair (STP)?

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Shielded twisted-pair cable combines the techniques of shielding and cancellation via the twisting of wires. Each pair of wires is wrapped in metallic foil. The four pairs of wires are wrapped in an overall metallic braid or foil. (It is normally 150-ohm cable.) STP reduces electrical noise originating inside the cable (crosstalk) and outside the cable (electromagnetic interference [EMI] and radio frequency interference [RFI]). Shielded twisted-pair cable shares many of the advantages and disadvantages of unshielded twisted-pair (UTP) cable. STP affords greater protection from all types of external interference, but it is more expensive and difficult to install than UTP. 3. What are some of the characteristics of unshielded twisted-pair (UTP)? Unshielded twisted-pair cable is a four-pair wire medium used in a variety of networks. Insulating material covers each of the eight individual copper wires in the UTP cable. In addition, each pair of wires is twisted around each other. This ... more
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