220-801 · Question #689
Which of the following is the BEST type of cable to prevent EMI?
The correct answer is B. Fiber. Fiber optic cables transmit data as pulses of light through glass or plastic strands rather than as electrical signals. Because there is no electrical current, fiber is completely immune to electromagnetic interference (EMI) - it cannot pick up or radiate electromagnetic noise…
Question
Which of the following is the BEST type of cable to prevent EMI?
Options
- ASTP
- BFiber
- CPlenum
- DUTP
How the community answered
(33 responses)- B94% (31)
- C3% (1)
- D3% (1)
Explanation
Fiber optic cables transmit data as pulses of light through glass or plastic strands rather than as electrical signals. Because there is no electrical current, fiber is completely immune to electromagnetic interference (EMI) - it cannot pick up or radiate electromagnetic noise. STP (Shielded Twisted Pair) reduces EMI through metallic shielding but does not eliminate it entirely. UTP has no shielding at all. Plenum cable refers to a fire-resistance rating for cable jacket material used in air-handling spaces, not an EMI characteristic. Fiber is the definitive best choice when EMI immunity is the requirement.
Topics
Community Discussion
No community discussion yet for this question.