200-301: Cisco Certified Network AssociateDemo

Single-mode fiber uses a single propagation mode/light path in a small core, which minimizes modal dispersion and supports long-distance transmission with less signal degradation. Multimode fiber carries multiple modes through a larger core, so the different paths arrive at different times, causing distortion over longer distances; it is commonly used for shorter distances even when supporting very high throughput such as 100 Gbit Ethernet.