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Understanding TCP/IP by Libor Dostálek, Alena Kabelová

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9.5 Response Delay Techniques

Interactive applications like Telnet and Character-at-a-time mode are complicated precisely because they are interactive. This means that if you press the B key on your keyboard, the character B is encapsulated in a TCP segment (20+1=21 B), the TCP segment is entered into an IP datagram (20+21=41 B) and this IP datagram then travels over the Internet as segment 1 (see Figure 9.13) until it reaches the server (of course, everything is also entered into link frames from router to router).

9.5 Response Delay Techniques

Figure 9.13: Press B and Y

The server:

  • Confirms receiving the character. In other words, if it does not have any data to send; it sends ...

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