CompTIA A+ Core 1 (220-1101) — Question 427

Which of the following cables provides the best performance with the least EMI?

Answer options

• A. Cat 5
• B. Cat 6
• C. Cat 7
• D. Coaxial

Correct answer: C

Explanation

Cat 7 cables are designed to provide superior performance with enhanced shielding, significantly reducing electromagnetic interference (EMI). In contrast, Cat 5 and Cat 6 cables have less shielding and therefore are more susceptible to EMI, while coaxial cables, although effective for certain applications, do not match the performance levels of Cat 7 in network environments.