1, UTP: Unshielded Twisted Pair (UTP: Unshielded Twisted Pair), is a kind of data transmission line, by the four pairs of different colors of the transmission line intertwined with each other composed of each pair of the same color of the line transferring back and forth between the two directions of the electrical impulses, the design of this is to make use of the electromagnetic induction of the principle of mutual offsetting to shield the electromagnetic interference.UTP is widely used for Ethernet (LAN) and telephone lines.
Non-shielded twisted-pair cable has no metal shielding material, only a layer of insulating rubber wrapped, relatively inexpensive, flexible networking, easier to install.
2, Shielded Twisted Pair (English: Shielded Twisted Pair, STP), is a widely used for data transmission of copper twisted pair.
In the physical structure, shielded twisted pair than unshielded twisted pair more full shielding and/or pair shielding layer, through the shielding way, reduces the attenuation and noise, thus providing a cleaner electronic signal, and longer cable lengths, but shielded twisted pair is more expensive, heavier and not easy to install.
Expanded Information:
Unshielded twisted-pair cables have the following advantages:
1. Unshielded jackets with small diameters save space occupied;
2. Lightweight, easy to bend, easy to install;
3, minimize or eliminate crosstalk;
4, flame retardant;
5, independence and flexibility, suitable for structured integrated wiring.
Reference:
Baidu Encyclopedia_Unshielded Twisted PairBaidu Encyclopedia_Shielded Twisted Pair