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Zorluk: Çok zorNetwork Cable Types and Connectors

A network architect is designing a 10 Gbps backbone connection between two distribution facilities on an industrial campus. The cable run measures 450 meters (1,476 feet) in length and must pass directly through an active air handling plenum space that contains high-voltage manufacturing equipment generating extreme electromagnetic interference (EMI). Which of the following cable types and fire-safety ratings must be selected to fulfill all bandwidth, distance, security, and environmental safety specifications?

  1. Single-mode fiber-optic cabling with a plenum-rated (CMP) jacketCevap
  2. B
    OM3 multi-mode fiber-optic cabling with a riser-rated (CMR) jacket
  3. C
    Category 6A STP copper cabling with a plenum-rated (CMP) jacket
  4. D
    Category 6 UTP copper cabling with a riser-rated (CMR) jacket

Cevap

Single-mode fiber-optic cabling with a plenum-rated (CMP) jacket
Single-mode fiber optic cable with a CMP (Plenum) jacket fulfills all constraints: it supports 10 Gbps speeds well beyond 450 meters (up to 10+ km), provides complete immunity to industrial electromagnetic interference, and satisfies fire safety standards for installation within building air ducting/plenum areas.

Adım Adım Çözüm

1
Evaluate distance and throughput requirements
The run requires 10 Gbps over 450 meters. Copper Ethernet cabling (Cat 6 / Cat 6A) is limited to 100 meters max, and OM3 multi-mode fiber is capped at 300 meters for 10Gbps (10GBASE-SR). Only single-mode fiber (OS2) can reliably transmit 10 Gbps over 450 meters.
Single-mode fiber utilizes a narrow core and laser light transmission to minimize modal dispersion over extended distances.
2
Assess environmental EMI interference
Fiber-optic cables transmit optical light signals through glass or plastic cores rather than electrical pulses through copper conductors, making them inherently immune to electromagnetic interference (EMI) and radio frequency interference (RFI).
Light signals are unaffected by adjacent high-voltage machinery or electrical conduits.
3
Verify building code and fire-safety specifications
Cabling placed inside air plenum spaces must be CMP (Plenum-rated) fire resistant to prevent toxic fume emission and flame spread during a fire.
Riser-rated (CMR) cables are designated only for vertical shafts between floors and lack the strict flame and smoke suppression required for plenum pathways.

Anahtar Kavram

Network Media Specifications, Fiber vs. Copper Distance Limits, and Plenum Ratings
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Konular

Network Cable Types and Connectors

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