What is the maximum backbone distance for multi-mode optical fiber?

What is the maximum backbone distance for multi-mode optical fiber?

• A. 800 meters
• B. 60000 meters
• C. 10000 meters
• D. 2000 meters

Answer: (C)

Backbone distance is limited by how much signal degrades as it travels, especially for multimode fiber where modal dispersion and attenuation restrict long runs at higher data rates. In many training references, a practical upper limit for multimode backbone links is about 10 kilometers, assuming appropriate fiber type and transceivers are used. That makes 10,000 meters the longest backbone distance commonly cited for multimode deployments. Shorter backbone options like 800 meters or 2,000 meters are valid but not the maximum, while excessively long spans (like 60,000 meters) would require different solutions or technologies.

Backbone distance is limited by how much signal degrades as it travels, especially for multimode fiber where modal dispersion and attenuation restrict long runs at higher data rates. In many training references, a practical upper limit for multimode backbone links is about 10 kilometers, assuming appropriate fiber type and transceivers are used. That makes 10,000 meters the longest backbone distance commonly cited for multimode deployments. Shorter backbone options like 800 meters or 2,000 meters are valid but not the maximum, while excessively long spans (like 60,000 meters) would require different solutions or technologies.