Category 7 (Cat 7) cables provide the best performance with the least Electromagnetic Interference (EMI) due to their enhanced shielding. Cat 7 cables are designed to support higher speeds and bandwidth while reducing interference compared to Cat 5 or Cat 6.
Why Not A (Cat 5): Cat 5 cables have limited shielding and are prone to EMI, making them unsuitable for high-performance requirements.
Why Not B (Cat 6): Cat 6 offers better shielding than Cat 5 but less than Cat 7.
Why Not D (Coaxial): While coaxial cables are resistant to EMI, Cat 7 offers better performance overall for networking applications.
CompTIA A+ Exam Reference: Core 1 (220-1101), Section 3.1, cable types and their performance characteristics​.
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