Twisted Pair Cable is a type of wiring in which two conductors are twisted together to reduce crosstalk and cancel out electromagnetic interference (EMI). When looking for Twisted Pair Cable, you may find UTP (Unshielded Twisted Pair) and STP (Shielded Twisted Pair).
The main difference is STP with an additional shielding.
STP with an additional shielding can have a better noise and interference immunity, theraby raising its total cost and heavier than UTP cable. In application, STP shielding must be connected. If there is any problem in its shielding connection such as poor grounding or open circuit, its performance will be greatly affected. In addition, STP installation and maintenance requirements are relatively high.
In general, STP cable is oftern used in high end applications that require high bandwidth and outdoor environments. UTP cable is oftern used in home, office and large scale of business.