Shielded twisted pair (STP),
Definition of Shielded twisted pair (STP):
Transmission media used often where the cable must pass near sources of electromagnetic interference (noise), such as high-voltage power lines, motors, television, transformers, x-ray machines. It consists of several pairs of unshielded twisted wire enclosed in an outer shield of metal or metal-braid. This shield conducts ambient noise safely to the ground, and thus provides high quality signal transmission. See also coaxial cable.
Meaning of Shielded twisted pair (STP) & Shielded twisted pair (STP) Definition