What is the function of bare copper wire in network cable?

This kind of network cable is twisted pair, which is a kind of shielded network cable, with shielded crystal head. The copper wire is used to connect the iron shell that shields the crystal head. The general environment can be used without connection, but of course it will pose a threat to signal transmission, and the effect can only depend on whether the source of interference is serious. x0dx0ax0dx0a twisted pair can be divided into shielded twisted pair (STP=SHIELDED) and unshielded twisted pair (UTP=UNSHIELDED). x0dx0aSTPx0dx0aSTP (shielded twisted pair) has a metal separator film in the twisted pair, which can reduce electromagnetic interference during data transmission, so its stability is high. The price of STP's twisted pair may be a few yuan 1 meter cheaper, and the expensive one may be more than 1 meter for more than a dozen yuan. x0dx0aUTPx0dx0aUTP (unshielded twisted pair) There is no such metal film, so its stability is poor, but its advantage is that the price is cheap. The price of twisted pair using UTP is generally about 1 meter 1 yuan. x0dx0a(1) unshielded jacket, small diameter, save the space occupied;x0dx0a(2) light weight, easy to bend, easy to install;x0dx0a(3) minimize or eliminate crosstalk;x0dx0a(4) flame retardant;x0dx0a(5) has independence and flexibility, suitable for structured cabling.