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TCP/IP Illustrated. The TCP/IP Guide. The TCP/IP Guide Welcome to the free online version of The TCP/IP Guide! My name is Charles and I am the author and publisher. I hope you will find the material here useful to you in your studies of computing, networking, and programming. Here are a few tips, links and reminders to help you out: Introduction: Newcomers to The TCP/IP Guide may wish to read the Introduction and Guide to the Guide, which will explain what the Guide is about and provide you with useful information about how to use it.

Navigation: For assistance understanding The TCP/IP Guide’s page structure and buttons, please refer to the Navigation Tips page. Last but definitely not least: this site is provided as an online reference resource for casual use. If you like The TCP/IP Guide enough to want your own copy in convenient PDF format, please license the full Guide. Thanks again and enjoy the site! Charles Home - Table Of Contents - Contact Us. TCP Operational Overview and the TCP Finite State Machine (FSM) TCP Operational Overview and the TCP Finite State Machine (FSM)(Page 2 of 3) The Simplified TCP Finite State Machine In the case of TCP, the finite state machine can be considered to describe the “life stages” of a connection.

Each connection between one TCP device and another begins in a null state where there is no connection, and then proceeds through a series of states until a connection is established. It remains in that state until something occurs to cause the connection to be closed again, at which point it proceeds through another sequence of transitional states and returns to the closed state. The full description of the states, events and transitions in a TCP connection is lengthy and complicated—not surprising, since that would cover much of the entire TCP standard. Table 151 briefly describes each of the TCP states in a TCP connection, and also describes the main events that occur in each state, and what actions and transitions occur as a result. Tap tap… still awake? Learn Code The Hard Way -- Books And Courses To Learn To Code.

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