Nowadays, the Internet is important in the daily lives of people in the past coaxial cable to transmit data over the Internet which can affect the speed limit has been changed to use fiber optic lines, so that data transmission over the Internet more and more. The optical fiber is classified into two types that is single mode fiber and multi-mode glass fiber. The highlight of the fiber optic the capability of sending information Loss less Electromagnetic waves cannot be disturbed Light weight Small size High safety information High safety for life and property. Fiber optic cables have a higher price than coaxial cable.