A UDP communication is known to be unreliable. (a) Explain the meaning of unreliable in this case. (b) How can applications using UDP connection achieve reliable data transfer?. (c) If the data 1010010111 needs to be transmitted in a communication and the Checksum method with k = 5 is used, calculate the error detection code generated. (d) Repeat step (c) if the CRC method with G = 10001 is used. *

15 points