TCP/IP is often a conceptual model that means the following four purposeful layers for these conversation links: The fourth era of fiber-optic communication systems applied optical amplification to reduce the have to have for repeaters and wavelength-division multiplexing (WDM) to extend facts potential. The introduction of WDM was the beginning https://brooks35s99.blogrelation.com/39969979/not-known-facts-about-cctv-systems