Ethernet networks.
if by "twisted pair cable" you mean a cat5 cable which is commonly used as an ethernet cable. then it´s made of copper.
A shielded twisted pair or STP is a copper telephone cable that secures signal-carrying wires inside a conducting shield. It main purpose is to reduce the possibility of electromagnetic intrusion.
A twisted pair cable consists of two copper conductors, each one with its own plastic insulation and twisted together
1. Copper UTP (Unshielded Twisted Pair) 2. Optical Fiber
twisted-pair
twisted pair cable can used as LAN connections....for example CAT5 and CAT6 both twisted pairs.
Copper, twisted-pair cable.
Twisted-pair cables are made out of copper, they are shielded with plastic to prevent electromagnetic interference but the actual cable is made out of copper.
Attenuation occurs in all copper cable regardless of whether it is twisted or not. This is because the copper atoms actually 'resist" the electrical voltage being applied (a physics principle).
UTP or unshielded twisted pair
1. Copper UTP (Unshielded Twisted Pair) 2. Optical Fiber
The type of transmission medium that consists of a number of individually insulated copper wires is called twisted pair cable. This type of cable is commonly used in Ethernet networks for data transmission due to its affordability and ability to reduce electromagnetic interference.