Similar to Copper cables, Fiber optic cables transport data. But Fiber Optic cables utilize light sources instead of the electrical current to transport the information. This yields far greater speeds and bandwidths at which data can be transported, giving the user much faster service. Fiber Optic cabling is also not subject to the stringent length limitations that copper cabling must adhere to. Fiber optic cabling falls into two categories, Multi-mode and single-mode fiber optics. Multi-mode is capable of larger bandwidths, but at shorter distances (maximum performance at ~500 meters). Single mode fiber optics cannot achieve quite as large of a bandwidth, but are capable of transporting information hundreds of kilometers. As information becomes more dense and speed cannot be sacrificed, Fiber Optic Cabling provides the solution. As with copper cabling, fiber optic cabling is subject to installation and performance requirements outlined by the Bicsi Telecommunications Distribution Methods Manual.