📖 What is Single-Mode Fiber (SMF)?
A type of optical fiber with a very small core diameter (typically 9 microns) that allows only one mode of light to propagate, used for long-distance, high-bandwidth applications.
"SMF typically uses a laser as the light source. If a question asks about connecting buildings across a campus or city, SMF is your answer."
📚 Certification: Certified Network Associate (200-301)
🔑 What are the Key Concepts of Single-Mode Fiber (SMF)?
- ▸ Small core diameter (8-10 microns).
- ▸ Uses laser light source.
- ▸ Minimal modal dispersion, enabling long-distance transmission.
🎯 How does Single-Mode Fiber (SMF) appear on the 200-301 Exam?
Choose the correct fiber type for a WAN connection spanning several kilometers.
Differentiate between SMF and MMF characteristics in a drag-and-drop question.
❓ Frequently Asked Questions
Is SMF more expensive than MMF?
The fiber cable itself might be similarly priced, but the laser transceivers required for SMF are significantly more expensive.
Can I connect SMF to an MMF transceiver?
No, mismatching fiber types and transceivers will result in severe signal loss and an unusable link.