Fiber optic cables are categorized using multiple criteria: transmission mode (single vs multimode), environment (indoor vs outdoor), construction (tight-buffered vs loose-tube), and application (e., data center, telecom, industrial). Below, we explore these classifications. The Fiber Optic Association, Inc. (FOA) was founded in 1995 to help develop the workforce to build the fiber optic networks to support a rapid expansion in communications and the Internet. Additionally, depending on the operating conditions of the cable, it can be enhanced by armor (for example, for laying in the ground). The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube. Standards at the system level cover signal bitrates, frequencies and amplitudes, protocols, data encoding, packet length, timing, error correction and many other factors that are needed to guarantee that systems can talk to each other. The cable is suitable for both indoor and ou door installation. The outer sheath is made from black UV-stabilized and weather resistant material which is SHF1 classified, and may be exposed for shorter periods to fluids such as diese and mineral oils. The laying of horizontal subsystem fiber optic cables is very similar to twisted pair cables, except that due to the poorer tensile properties of fiber optic cables, more care should be.