TCP IP Illustrated

1023 14 00173 win 4096 1739974 15 bsdi1023 svr4login

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Unformatted text preview: svr4.login: 1 0.0 win 4096 0.016497 svr4.login > bsdi.1023: 2 (0.0165) win 4096 0.139955 3 bsdi.1023 > svr4.login: (0.1235) 0.458037 bsdi.1023 > svr4.login: 4 (0.3181) win 4096 0.474386 svr4.login > bsdi.1023: 5 (0.0163) win 4096 0.539943 6 bsdi.1023 > svr4.login: (0.0656) 0.814582 bsdi.1023 > svr4.login: 7 (0.2746) win 4096 0.831108 svr4.login > bsdi.1023: 8 (0.0165) win 4096 0.940112 9 bsdi.1023 > svr4.login: (0.1090) 1.191287 bsdi.1023 > svr4.login: 10 (0.2512) win 4096 1.207701 svr4.login > bsdi.1023: 11 (0.0164) win 4096 1.339994 12 bsdi.1023 > svr4.login: (0.1323) 1.680646 bsdi.1023 > svr4.login: 13 (0.3407) win 4096 1.697977 svr4.login > bsdi.1023: 14 (0.0173) win 4096 1.739974 15 bsdi.1023 > svr4.login: (0.0420) 1.799841 svr4.login > bsdi.1023: 16 (0.0599) win 4096 1.940176 17 bsdi.1023 > svr4.login: (0.1403) 1.944338 svr4.login > bsdi.1023: 18 (0.0042) win 4096 2.140110 19 bsdi.1023 > svr4.login: (0.1958) P 0:1(1) ack 1 P 1:2(1) ack 1 . ack 2 win 4096 P 1:2(1) ack 2 P 2:3(1) ack 2 . ack 3 win 4096 P 2:3(1) ack 3 P 3:4(1) ack 3 . ack 4 win 4096 P 3:4(1) ack 4 P 4:5(1) ack 4 . ack 5 win 4096 P 4:5(1) ack 5 P 5:7(2) ack 5 . ack 7 win 4096 P 7:37(30) ack 5 . ack 37 win 4096 P 37:44(7) ack 5 . ack 44 win 4096 file:///D|/Documents%20and%20Settings/bigini/Docum...i/homenet2run/tcpip/tcp-ip-illustrated/tcp_int.htm (3 of 14) [12/09/2001 14.47.18] Chapter 19. TCP Interactive Data Flow Figure 19.2 TCP segments when date typed on Rlogin connection. plus a CR/LF pair at the end. The next 7 bytes sent from the server to the client (line 18) are the client's prompt on the server host: svr4 % . Line 19 acknowledges these 7 bytes. Notice how the TCP acknowledgments operate. Line 1 sends the data byte with the sequence number 0. Line 2 ACKs this by setting the acknowledgment sequence number to 1, the sequence number of the last successfully received byte plus one. (This is also called the sequence number of the next expected byte.) Line 2 also sends the data byte with a sequence number of 1 from the serve...
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