A bit stream 10011101 is transmitted using the standard CRC method described in the text. The generator polynomial is x3 + 1. Show the actual bit string transmitted. Suppose the third bit from the left is inverted during transmission. Show that this error is detected at the receiver's end.
Answer to relevant QuestionsData link protocols almost always put the CRC in a trailer rather than in a header. Why?If the procedure between in protocol 5 checked for the condition a < b < c instead of the condition a < b < c, would that have any effect on the protocol's correctness or efficiency? Explain your answer.In protocol 6, MAX_SEQ = 2n - 1. While this condition is obviously desirable to make efficient use of header bits, we have not demonstrated that it is essential. Does the protocol work correctly for MAX_SEQ = 4, for example?PPP is based closely on HDLC, which uses bit stuffing to prevent accidental flag bytes within the payload from causing confusion. Give at least one reason why PPP uses byte stuffing instead.How long does a station, s, have to wait in the worst case before it can start transmitting its frame over a LAN that uses (a) The basic bit-map protocol? (b) Mok and Ward's protocol with permuting virtual station numbers?
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