220-801 · Question #495
Which of the following cables is prone to electromagnetic interference?
The correct answer is D. UTP. UTP (Unshielded Twisted Pair) is the most common Ethernet cabling but, as the name states, it has no metallic shielding around the wire pairs. This makes it susceptible to electromagnetic interference (EMI) from nearby motors, fluorescent lights, and other electrical equipment…
Question
Which of the following cables is prone to electromagnetic interference?
Options
- ASTP
- BPVC
- CPlenum
- DUTP
How the community answered
(36 responses)- A3% (1)
- C3% (1)
- D94% (34)
Explanation
UTP (Unshielded Twisted Pair) is the most common Ethernet cabling but, as the name states, it has no metallic shielding around the wire pairs. This makes it susceptible to electromagnetic interference (EMI) from nearby motors, fluorescent lights, and other electrical equipment. STP (Shielded Twisted Pair) has metallic shielding that protects against EMI. Plenum and PVC refer to the cable jacket material used for fire safety in air-handling spaces - they describe the outer coating, not the shielding. For environments with high EMI, STP or fiber optic cables are preferred over UTP.
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