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Fiber communication
• Transmission by light– The visible spectrum
• No RF signal– Very difficult to monitor or tap
• Signal slow to degrade– Transmission over long distances
• Immune to radio interf
Multimode fiber
• Short-range communication– Up to 2 km
• Inexpensive light
Single-mode fiber
Single-mode fiber
• Long-range communication– Up to 100 km without processing
• Expensive light source
ignore
ignore