CompTIA Security+

Answer: D - Faraday cage or a Faraday shield is an enclosure formed by conducting material or by a mesh of such material.

Key Takeaway: Shielding refers to the process of preventing electronic emissions from your computer systems from being used to gather intelligence and preventing outside electronic emissions from disrupting your information-processing abilities. In a fixed facility such as a computer center, surrounding the computer room with a Faraday cage can provide electronic shielding.