Examkin

Question

Difficulty: EasyPhysical Interface and Cabling Types

A network technician is installing a new backbone link between two network switches located in separate campus buildings that are 2 kilometers apart. The project specification requires a Gigabit Ethernet connection over fiber-optic cabling. Which combination of optical transceiver standard and fiber cabling type must be selected to support this link?

  1. 1000BASE-LX transceiver with Single-Mode Fiber (SMF)Answer
  2. B
    1000BASE-SX transceiver with Multi-Mode Fiber (MMF)
  3. C
    1000BASE-T transceiver with Category 6A UTP cable
  4. D
    100BASE-FX transceiver with Multi-Mode Fiber (MMF)

Answer

1000BASE-LX transceiver with Single-Mode Fiber (SMF)
The combination of a 1000BASE-LX transceiver and Single-Mode Fiber (SMF) is designed for long-wavelength laser transmission over long distances, supporting Gigabit Ethernet reaches up to 5 km. This fully covers the required 2-kilometer span.

Step-by-Step Solution

1
Identify the required bandwidth and distance specs.
The requirement specifies Gigabit Ethernet (1000 Mbps) over a distance of 2 kilometers.
Choosing physical layer optics requires matching speed rating and distance limitations.
2
Evaluate candidate Ethernet transceiver standards against the 2 km requirement.
1000BASE-LX over Single-Mode Fiber supports Gigabit speeds up to 5 km, whereas 1000BASE-SX maxes out at 550m and copper 1000BASE-T maxes out at 100m.
Single-mode fiber features a tiny core (9μm9\mu m) that minimizes modal dispersion over long distances.

Key Concept

Gigabit Ethernet Fiber Transceiver Specifications (1000BASE-LX vs 1000BASE-SX)
Rate this question

Topics

Physical Interface and Cabling Types

More questions from this topic