Shielded copper cabling is typically used to reduce exposure to what?

• A. Radio frequency leakage.
• B. Electromagnetic interference.
• C. Signal attenuation.
• D. Noise from fiber connectors.

Answer: (B)

Shielded copper cabling is designed to reduce exposure to electromagnetic interference. The shield provides a conductive barrier around the conductors that intercepts external electric and magnetic fields and noise, then is grounded to carry that interference away. This keeps unwanted signals from coupling into the copper pairs, preserving data integrity and reducing stray emissions to nearby equipment. It's not primarily about reducing signal attenuation, and it doesn't pertain to noise from fiber connectors; the key benefit is shielding against external EMI.