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RFC 793 State machine study. 3-way handshake Page 31, Figure 7.

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Presentation on theme: "RFC 793 State machine study. 3-way handshake Page 31, Figure 7."— Presentation transcript:

1 RFC 793 State machine study

2 3-way handshake Page 31, Figure 7

3 3-way handshake TCP A TCP B SEQ=NA Page:31 Figure CLOSED LISTEN SEQ=NA SEQ=300 Should_ACK=NA

4 3-way handshake TCP A TCP B SEQ=NA SEQ=300 Page:31 Figure CLOSED LISTEN 2. SYN-SENT --> --> SYN-RECEIVED SEQ=100 SEQ=100 CTL=SYN ACK= DATA= Should_ACK=NA Should_ACK=101

5 3-way handshake TCP A TCP B SEQ=300 Page:31 Figure SYN-SENT --> --> SYN-RECEIVED 3. ESTABLISHED <-- SYN-RECEIVED SEQ=100 CTL=SYN ACK= DATA= SEQ=300 CTL=SYN ACK=101 DATA= SEQ=100 Should_ACK=NA Should_ACK=101 Should_ACK=301 SEQ=101

6 3-way handshake TCP A TCP B SEQ=300 Page:31 Figure ESTABLISHED <-- SYN-RECEIVED 4. ESTABLISHED --> --> ESTABLISHED SEQ=300 CTL=SYN ACK=101 DATA= SEQ=101 Should_ACK=101 Should_ACK=301 SEQ=100 CTL= ACK=301 DATA= Should_ACK=101 SEQ=301

7 3-way handshake TCP A TCP B SEQ=301 Page:31 Figure ESTABLISHED --> --> ESTABLISHED 5. ESTABLISHED --> --> ESTABLISHED SEQ=101 Should_ACK=101 Should_ACK=301 SEQ=100 CTL= ACK=301 DATA= SEQ=100 CTL= ACK=301 DATA=10 Should_ACK=111 SEQ=301


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