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RFC 793 State machine study

RFC 793 State machine study. Simultaneously active SYN Page 32, Figure 8. Page:32 Figure. 8. Simultaneously active SYN. TCP A. TCP B. Should_ACK =NA. Should_ACK =NA. SEQ=NA. SEQ=NA. 1. CLOSED CLOSED. Page:32 Figure. 8.

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RFC 793 State machine study

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  1. RFC 793State machine study

  2. Simultaneously active SYN Page 32, Figure 8

  3. Page:32 Figure. 8 Simultaneously active SYN TCP A TCP B Should_ACK=NA Should_ACK=NA SEQ=NA SEQ=NA 1. CLOSED CLOSED

  4. Page:32 Figure. 8 Simultaneously active SYN TCP A TCP B SEQ=100 Should_ACK=NA Should_ACK=NA SEQ=NA SEQ=NA SEQ=100CTL=SYN ACK= DATA= 1. CLOSED CLOSED 2. SYN-SENT --> <SEQ=100><CTL=SYN> ...

  5. Page:32 Figure. 8 Simultaneously active SYN TCP A TCP B SEQ=100 Should_ACK=301 Should_ACK=NA Should_ACK=NA SEQ=300 SEQ=NA SEQ=100CTL=SYN ACK= DATA= SEQ=300CTL=SYN ACK= DATA= 2. SYN-SENT --> <SEQ=100><CTL=SYN> ... 3. SYN-RECEIVED <-- <SEQ=300><CTL=SYN> <-- SYN-SENT

  6. Page:32 Figure. 8 Simultaneously active SYN TCP A TCP B SEQ=100 Should_ACK=301 Should_ACK=NA SEQ=300 SEQ=100CTL=SYN ACK= DATA= SEQ=100CTL=SYN ACK=301 DATA= SEQ=300CTL=SYN ACK= DATA= 3. SYN-RECEIVED <-- <SEQ=300><CTL=SYN> <-- SYN-SENT 5. SYN-RECEIVED --> <SEQ=100><ACK=301><CTL=SYN,ACK> ...

  7. Page:32 Figure. 8 Simultaneously active SYN TCP A TCP B SEQ=100 Should_ACK=301 Should_ACK=NA Should_ACK=101 SEQ=300 SEQ=100CTL=SYN ACK= DATA= SEQ=100CTL=SYN ACK=301 DATA= 5. SYN-RECEIVED --> <SEQ=100><ACK=301><CTL=SYN,ACK> ... 4. ... <SEQ=100><CTL=SYN> --> SYN-RECEIVED

  8. Page:32 Figure. 8 Simultaneously active SYN TCP A TCP B Should_ACK=301 SEQ=101 SEQ=100 Should_ACK=301 Should_ACK=101 SEQ=300 SEQ=100CTL=SYN ACK=301 DATA= SEQ=100CTL=SYN ACK= DATA= SEQ=300CTL=SYN ACK=101 DATA= 4. ... <SEQ=100><CTL=SYN> --> SYN-RECEIVED 6. ESTABLISHED <-- <SEQ=300><ACK=101><CTL=SYN,ACK> <-- SYN-RECEIVED

  9. Page:32 Figure. 8 Simultaneously active SYN TCP A TCP B SEQ=101 Should_ACK=301 Should_ACK=101 Should_ACK=101 SEQ=300 SEQ=301 SEQ=101CTL= ACK=301 DATA= 6. ESTABLISHED <-- <SEQ=300><ACK=101><CTL=SYN,ACK> <-- SYN-RECEIVED 7. ... <SEQ=101><ACK=301><CTL=ACK> --> ESTABLISHED

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