中央新闻纪录电影制片厂 The fourth generation of fiber-optic interaction systems made use of optical amplification to lessen the have to have for repeaters and wavelength-division multiplexing (WDM) to improve data capability. The introduction of WDM was the beginning of optical networking, as WDM grew to become the technological know-how of choice for https://kenwoodchefxlelite50369.worldblogged.com/39785755/the-best-side-of-network-switch