Consider TCP (Transmission Control Protocol) communications between two ma- chines, A and B. Machine A sends...

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Consider TCP (Transmission Control Protocol) communications between two ma- chines, A and B. Machine A sends a segment, X, containing 1000 bytes and with the sequence number 2000 to machine B. Machine A then sends another segment, Y, containing 1000 bytes to machine B. Assume that machine B receives segment X, but not segment Y, and also that B's acknowledgement of segment X is lost. So machine A retransmits both segments X and Y. However, segment Y now arrives at machine B before segment X. i. What should the sequente number of segment Y be? ii. (1 mark) What acknowledgement number should machine B use when it receives the re- transmission of segment Y? (1 mark) iii. What acknowledgement number should machine B use when it receives the re- transmission of segment X? Consider TCP (Transmission Control Protocol) communications between two ma- chines, A and B. Machine A sends a segment, X, containing 1000 bytes and with the sequence number 2000 to machine B. Machine A then sends another segment, Y, containing 1000 bytes to machine B. Assume that machine B receives segment X, but not segment Y, and also that B's acknowledgement of segment X is lost. So machine A retransmits both segments X and Y. However, segment Y now arrives at machine B before segment X. i. What should the sequente number of segment Y be? ii. (1 mark) What acknowledgement number should machine B use when it receives the re- transmission of segment Y? (1 mark) iii. What acknowledgement number should machine B use when it receives the re- transmission of segment X?

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