why is UTP used more than STP?

1 Answer

  • 1 decade ago
    Favorite Answer

    Shielded twisted-pair cable (STP) combines shielding, cancellation, twisting of wires

    STP reduces electrical noise; causes Crosstalk,

    electromagnetic interference (EMI),

    radio frequency interference (RFI).

    STP affords greater protection from all types of external interference

    Disadvantages: more expensive, difficult to install than UTP

    A new hybrid of UTP with traditional STP is Screened UTP (ScTP), also known as Foil Twisted Pair (FTP).

    The metallic shielding materials in STP and ScTP need to be grounded at both ends. If improperly grounded or if there are any discontinuities: STP and ScTP can become susceptible to major noise problems.

    Unshielded twisted-pair cable (UTP)

    4 pairs of wires

    Each wire covered by insulating material.

    Each pair of wires is twisted around each other.

    Number of Twists limits signal degradation caused by EMI and RFI.

    2 cables for each outlet

    one for voice

    one for data


    It is easy to install

    less expensive than other types of networking media.

    However, the real advantage is the size of the cable


    prone to electrical noise and interference

    shorter runs than coaxial and fiber optic cables

    view my complete comparison and you be the judge... ciao.

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