Reference no: EM133314039
Questions
1. Explain in details how CSMA/CD works on Ethernet.
2. A CRC coding scheme uses the generator polynomial G: 1001. It needs to add 3 check bits to the message. The message is 110011.
a) Derive the check bits and the transmitted bit stream.
b) Consider there is an error in one of the transmitted bits. Explain how this error can be detected.)
Show the complete division process in both 2(a) and 2(b).
3. Explain how ALOHA and slotted ALOHA protocols work. In terms of efficiency, which is better? Please justify your answer.
4. Recall that with the CSMA/CD protocol, the adapter waits K x 512 bit times after a collision, where K is drawn randomly. For K=100, how long does the adapter wait until returning to Step 2 for a 10 Mbps broadcast channel? How about for a 100 Mbps broadcast channel?
5. In CSMA/CD, after the fifth collision, what is the probability that a node chooses K = 4? How about after sixth collision?
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