Fibre optic cables are being used more and more by telephone companies to provide super-fast internet connections to people all over the world. These cables transmit data signals in the form of light. This light channel consists of two main parts – core and cladding. The cladding acts as a protective layer for the core, but, more than that, it also acts as a reflector for the beam of light moving through the core. This helps to keep the cable lightweight while reducing the risk of signal degradation problems that twisted pair and coaxial cables suffer from. However, this type of cable is expensive and can be fragile due to its glass parts. There are two types of connectors for fibre optic cables - the SC connector used for cable TV, and the ST connector used for connecting cables to networking devices.