Which term describes an optical fiber that allows multiple modes of light to propagate, typically used for shorter distances?

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Light travels through an optical fiber in patterns called modes. A fiber that allows many of these light patterns to propagate has a relatively large core and is known as multimode fiber. Because different modes can take slightly different paths and speeds, they can blur signals over longer distances, so multimode fiber is typically used for shorter links, like inside a building or data center. The other terms don’t describe a fiber type: optical transmitters are devices that send the signal, the dielectric constant is a material property related to electric fields, and Unshielded Twisted-Pair is a copper cabling standard, not optical fiber.