Fiber optic cables can be found in many various forms. Generally speaking, an optical fiber can be reduced to three main sections, or layers. Starting in the center of the cable, the core is where the work is done. Information is directed through the core, in the form of light, using total internal reflection to transmit data. Surrounding this core is the cladding, which provides protection to the core. Surrounding this cladding, is the fiber’s sleeve, or jacket, which is the outermost layer of the cable, providing protection to the fiber as a whole.