Fiber optics is composed of microscopic strands of glass.
Information in the form of bytes of data can travel through this glass at the speed of light. The fiber optic strands of glass are enclosed inside tubes which are protected by several layers, including Kevlar , the same material used in bullet-proof jackets. Single Mode Fiber Optic Cable Primarily used as an interbuilding backbone cable. At distances up to 3 km., single mode fiber will deliver data rates up to 10 Gbps. with a bandwidth of 20Ghz. Single mode fiber's primary uses are long distance applications, full motion video, and any applications requiring extremely high bandwidth.