“…By itself, WDM and DWDM technologies have the necessary mechanisms to ensure high throughput, security, transmission reliability and message delivery assurance. 2,3,10,11 In addition, a key advantage WDM and DWDM is that it is protocol and bit rate independent. Optical networks based on DWDM can transmit data in IP (IP, Internet Protocol), ATM (ATM, Asynchronous Transfer Mode), SDH (SDH, Synchronous Digital Hierarchy), SONET (SONET, Synchronous Optical Network), and Ethernet.…”