Shielded Twisted Pair (STP) Cable
STP is similar to UTP but with each pair covered by an additional copper braid jacket or foil wrapping. This shielding helps protect the signals on the cables from external interference.
STP is more expensive than UTP but has the benefit of being able to support higher transmission rates over longer distances.
STP is used in IBM token ring networks.
Click on this link to review the wikipedia resource on STP cable