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9. suppose host a sends three tcp segments back to back to host b over a tcp connection. the first segment has sequence number 110; the second has sequence number 150; the third has sequence number 200. (1) how many bytes of data are in the three segments respectively? (2) suppose that the second segment is lost but the first and third segments arrive at b. in the next segment that host b sends to host a after the third segment from a arrives at b, what will be the acknowledgment number?

Answer :

PRIYAMMGO

A host uses a sequence number as a counter to record each byte that is transferred outside of the system.

What is the first sequence number in TCP?

  • A sequence number of 1 is sent with the initial TCP segment. This is the segment's initial byte's sequence number. (Note that TCP keeps sequence numbers at the byte level, unlike other protocols.
  • The first byte in the segment is matched by the sequence number field in the TCP header.)
  • A host uses a sequence number as a counter to record each byte that is transferred outside of the system.
  • The sequence number will be raised by 1400 once a TCP packet is transmitted if it has 1400 bytes of data. The acknowledgement number is at offset 64.
  • Starting each connection with a sequence number of 1 has the drawback of increasing the likelihood of segments from various connections becoming muddled.

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