Which two statements about fiber cable are true? (Choose two)

Question

Options

• ASingle-mode fiber supports SC and LC connectors only.
• BMultimode cable supports speeds between 100 Mbps and 9.92 Gbps.
• CSingle-mode cable is most appropriate for installations longer than 10 km.
• DFiber cable is relatively inexpensive and supports a higher data rate than coaxial cable.
• EMulitimode cable supports speeds between 100 Mbps and 100 Gpbs.

• A
  2% (1)
• B
  2% (1)
• C
  90% (43)
• D
  6% (3)

Explanation

Single-mode fiber allows only one mode of light to propagate because it has a very small core diameter (around 8-10 microns). This reduces light reflections and modal dispersion, resulting in lower attenuation and enabling the signal to travel much longer distances-typically beyond 10 km-making it ideal for long-distance and high-bandwidth applications. Multimode fiber has a larger core diameter (usually 50 or 62.5 microns) that supports multiple modes of light simultaneously. This causes higher modal dispersion and attenuation, which limits the effective transmission distance to shorter spans (often hundreds of meters to a few kilometers depending on fiber grade) and bandwidth compared to single-mode fiber. However, multimode fiber is more cost-effective for short-range installations such as inside buildings or data centers. Single-mode cable is good for installations longer than 10km. At present, there are four kinds of multi-mode fibers: OM1, OM2, OM3 and OM4. The letters “OM” stand for optical multi-mode. OM3 and OM4 fibers will support upcoming 40 and 100 Gb/s

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