Cisco CCNA Certification Exam 642-241

Which media type is the MOST susceptible to electromagnetic interference (EMI)?
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A. Category 5 UTP cable
B. RG-8 coaxial cable
C. Single-Mode Fiber Optic cable
D. MultiMode Fiber Optic cable
Answer: A
Explanation:
UTP cable is susceptible to EMI.

Incorrect Answers:
B: RG-8 coaxial cable is also 642-052 susceptible to EMI, but not to the same extent as UTP.
C, D: Fiber optic cable is immune to EMI.

References:
David Groth and Dan Newland, A+ Complete 642-352 Study Guide (2nd Edition), Sybex,
Alameda CA, 2002, pp. 325,327.
David Groth and Toby Skandier, Network+ Study Guide (4th Edition), Sybex, Alameda
CA, 2005, pp. 19-20, 25-27