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STP is distinguished from UTP by which of the following properties?

A STP has a layer of foil shielding inside the cable insulation.

To reduce electrical interference, shielded twisted pair (STP) cabling incorporates a foil shield enclosing the wire pairs. several STP cables also shield individual wire pairs. The shielding is removed in unshielded twisted pair (UTP). Both types employ RJ-45 connectors, can adhere to the T568A wiring standard, and can be made as plenum-rated cable that does not emit toxic gas when burnt.

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