El cableado estructurado consiste en el tendido de cables de par trenzado blindados (Shielded Twisted Pair, STP) o no blindados (Unshielded Twisted Pair, UTP) en el interior de un edificio con el propósito de implantar una red de área local (Local Area Network, LAN).
Suele tratarse de cables de pares trenzados de cobre, para redes de tipo IEEE 802.3; no obstante, también puede tratarse de fibras ópticas o cables coaxiales.
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