Shielded Ethernet Cables (often labeled as STP/SFTP) are specialized cables with an extra metallic shield (e.g., foil or braid) around the twisted pairs. This design enhances anti-interference performance, minimizing signal loss from external electromagnetic interference (EMI) or radio frequency interference (RFI). Available in grades like Cat6a, Cat7, and Cat8, they’re ideal for high-speed, mission-critical scenarios such as data centers, industrial environments, or wiring near electrical equipment where signal stability is paramount.