shielded twisted pair STP and UTP both contain 8 lines inside 4 lines are used for carrying the sending data and 4 others are used for receiving the data this is the reason why collision doesn't occur inside the STP and UTP
To save the data flow from ATTENUATE and external INTERFERENCE.
STP is shielded twisted pair - used in data communications.
Twisted pair wire is placed inside a thin metallic shielding, similar to aluminum foil, and is then enclosed in an outer plastic casing. The shielding provides further electrical isolation of the signal-carrying pair of wires. Shielded twisted pair wires are less susceptible to electrical interference caused by nearby equipment or wires and, in turn, are less likely to cause interference themselves. Because it is electrically "cleaner," shielded twisted pair wire can carry data at a faster speed than unshielded twisted pair wire can. The disadvantage of shielded twisted pair wire is that it is physically larger and more expensive than twisted pair wire, and it is more difficult to connect to a terminating block.
No
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.
Shielded Twisted pair cable
Category 5 ( CAT5 ) cable can transmit up to 100 Mb/s
Shielded twisted pair wires are less susceptible to electrical interference caused by nearby equipment or wires and, in turn, are less likely to cause interference themselves. Because it is electrically "cleaner," shielded twisted pair wire can carry data at a faster speed. The disadvantage of shielded twisted pair wire is that it is physically larger and more expensive than twisted pair wire, and it is more difficult to connect to a terminating block.
So that other signals, such as a magnetic field, don't interfere with the cable signals.
The twisting in a twisted pair cable helps make the cable immune to electromagnetic interference. These cables are of two types: Shielded and unshielded twisted pair.
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.
Shielded Twisted Pair (STP)