In the single mode vs. multimode fiber debate, there is not one cable that's the best, but there are some that are better suited to certain situations. If you need to run fiber optic cable over a vast distance, there's no argument that single m. In the single mode vs. multimode fiber debate, there is not one cable that's the best, but there are some that are better suited to certain situations. If you need to run fiber optic cable over a vast distance, there's no argument that single mode OS2 fiber cables are by far the best tool for the job. But if you're looking to run shorter cables tha. Single mode and multimode fiber optic cables are two different types of fiber optic cable aimed at different use cases. Single mode cables are typically made with a single strand of glass at their core, leading to a narrower core of the cabling, and more robust signal integrity over greater distances. They can be further divided into OS1 and OS2 ca. The key physical difference when comparing single mode vs multimode fiber cables is the core. Where single mode cables have a single glass strand at their core, measuring around 9µm, the multiple strands used to craft a multimode cable's core measure 62.5µm or 50µm. This physical disparity is what leads to the performance and use case differences f. The main consideration when choosing a fiber optic cable is deciding which type you opt for. Single mode vs. multimode fiber cable is a debate you can answer by considering the cable length(s) required as well as the necessary bandwidth. If you are happy with a maximum of 10Gbps bandwidth at lengths under two miles, then you have the choice of OS1.