homework5 - IT 420 - Homework 4 1. Why is the UDP checksum...

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IT 420 - Homework 4 1. Why is the UDP checksum separate from the IP checksum? Would you object to a protocol that used a single checksum for the complete IP datagram including the UDP message? Many possible answers would satisfy this question. The primary reason that they are separate is that they evaluate the integrity of different data. The IP checksum only deals with the integrity of the header, while the UDP checksum deals with the data area as well as the header. 2. Lost TCP acknowledgements do not necessarily force retransmissions. Explain why. TCP acknowledgements contain the sequence number of the next octet of data that is expected to be received. If an acknowledgement is dropped in an increasing window size environment, more data may be sent out before the timeout value is reached. In this instance, the receiver sends an acknowledgement for the new data with an updated sequence number that shows that the previous data was already received. 3.
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homework5 - IT 420 - Homework 4 1. Why is the UDP checksum...

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