A. a. Consider a communication system that uses a Cyelic Redundancy Check (CRC)
14+3
method to transmit a message 11001001 with the polynomial function
x^(1)+1
to
=71
detect errors in data transmission. Use polynomial long division to determine the message that should be transmitted from the sender side. Next, oorrupt the lef-most thind bit of the transmitted message and show that the error is detected by the receiver using the CRC teelnique. b. How do Dense Wavelength Division Multiplexing (DWDM) and Coarse 3 Wavelength Division Multiplexing (CWDM) differ in terms of their principles, applications, and advantages, and what are the key factors influencing the choice between these two technologies in optical networking?