What is screened and unscreened cable?

shielded cable and unshielded cable in the visual difference lies in the shielded cable has a metal mesh, film; unshielded cable is not. Shielded twisted pair cable (STP) of each pair of wires are wrapped in foil to reduce amplitude, and then wrapped again to provide double protection: Unshielded twisted pair (UTP) cable twists each pair of wires together, consisting of multiple cores and a plastic sheath.