Please Whitelist This Site?
I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)
If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.
If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.
Thanks for your understanding!
Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide
NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.
TCP Basic Operation: Connection Establishment, Management and Termination
While I have described the Transmission
Control Protocol as connection-oriented, this term isn't "just
any old characteristic" of TCP. The overall operation of the entire
protocol can be described in terms of how TCP software prepares, negotiates,
establishes, manages and terminates connections. TCP implementations
certainly do more than handle connections, but the other major tasks
they perform, such as data handling and providing reliability and flow
control, can only occur over a stable connection. This makes connections
the logical place to begin in exploring the details of how TCP does
In this section I describe TCP connections
from start to finish. I begin with an overview of TCP's operation by
providing a summary of the finite state machine that formally
defines the stages of a connection. State machines can be a bit mind-boggling
when you read about them in standards, but a simplified version provides
an excellent high-level view of the "life" of a connection, so it is
a good place to start.
From there, I move on to provide
details about TCP's handling of connections. I described how connections
are prepared and transmission control blocks (TCBs) set up, and the
difference between a passive and an active socket open. I explain the
three-way handshake used to create a connection, and the method by which
parameters are exchanged and sequence numbers synchronized. I talk about
how an established connection is managed, including the method by which
TCP handles problem conditions and resets the connection when necessary.
Finally, I describe how a connection can be terminated when it is no
|If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!|
Table Of Contents - Contact Us
The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005
© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.