Q44:Is there a difference between shielded and screened cable?
A44:Yes. Shielded cable (denoted by STP) is most often known as 'IBM
Type 1' cable. It is defined in TIA-568-A as two individually twisted
pairs separated by a shield with a nominal impedance of 150 ohms. Screened
cable (called ScTP) can be considered a close relative of UTP. It consists
of 4 pairs of 22 or 24 AWG wire enclosed by an outer foil.
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