When preparing for the Security+ exam, you'll come across this objective: "Explain the importance of environmental controls" including Shielding. Here's a practice question
What is the purpose of a Faraday cage? (Choose all that apply.)
A. To mitigate data emanation
B. To detect attacks on host
C. To detect network attacks
D. To prevent interference
Over 375 practice test questions in this book:
Answer: A, D.
A Faraday cage is designed to mitigate data emanation and also prevents EMI/RFI from entering the enclosures. Network intrusion detection systems (NIDS) would be used to detect network attacks, and host-based intrusion detection systems (HIDS) would be used to detect attacks on a host.