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CompTIA

220-801 · Question #364

Which of the following types of Ethernet should be used if a technician has no choice but to run cable along fluorescent lighting arrays in a suspended ceiling?

The correct answer is A. STP. Fluorescent lighting generates significant electromagnetic interference (EMI). STP (Shielded Twisted Pair) cable has a metallic foil or braided shield surrounding the twisted pairs, which protects the signal from EMI. UTP (Unshielded Twisted Pair) has no such shielding and is…

Networking

Question

Which of the following types of Ethernet should be used if a technician has no choice but to run cable along fluorescent lighting arrays in a suspended ceiling?

Options

  • ASTP
  • BRG-6
  • CPVC
  • DUTP

How the community answered

(37 responses)
  • A
    78% (29)
  • B
    14% (5)
  • C
    3% (1)
  • D
    5% (2)

Explanation

Fluorescent lighting generates significant electromagnetic interference (EMI). STP (Shielded Twisted Pair) cable has a metallic foil or braided shield surrounding the twisted pairs, which protects the signal from EMI. UTP (Unshielded Twisted Pair) has no such shielding and is highly susceptible to interference from fluorescent lights. RG-6 is a coaxial cable used for cable TV/satellite, not Ethernet. PVC refers to the outer jacket material, not a shielding property. When routing cable near EMI sources like fluorescent lights is unavoidable, STP is the correct choice.

Topics

#STP cable#EMI shielding#network cabling#interference mitigation

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