File:TCP connection establishment.svg

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DescriptionTCP connection establishment.svg	עברית: הקמת קשר TCP English: TCP connection establishment
Date	1 February 2026
Source	Own work
Author	Adielbm

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	06:36, 1 February 2026		512 × 335 (51 KB)	Adielbm	Uploaded own work with UploadWizard

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Transmission Control Protocol

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Image title

% based on: https://tex.stackexchange.com/a/155416 (Posted by Ignasi, modified by community) and https://commons.wikimedia.org/wiki/File:TCP_CLOSE.svg (Clemente)

\documentclass[tikz, border=5mm]{standalone}

\usetikzlibrary{arrows,shadows,positioning}

\begin{document}

\begin{tikzpicture}[font=\sffamily,>=stealth',thick, commentl/.style={text width=3cm, align=right}, commentr/.style={commentl, align=left}, packetinfo/.style={below, sloped, font=\scriptsize\sffamily, text width=3.2cm, align=center},] \node[] (init) {\LARGE Client}; \node[right=1cm of init] (recv) {\LARGE Server};

% 3-way handshake: SYN, SYN-ACK, ACK \draw[->] ([yshift=-1.3cm]init.south) coordinate (syn1o) -- ([yshift=-.7cm]syn1o-|recv) coordinate (syn1e)

 node[pos=.25, above, sloped] {SYN}
 node[pos=.25, packetinfo] {$\mathsf{seq=x}$};

\draw[->] ([yshift=-.3cm]syn1e) coordinate (synacko) -- ([yshift=-.7cm]synacko-|init) coordinate (synacke)

 node[pos=.45, above, sloped] {SYN, ACK}
 node[pos=.35, packetinfo] {$\mathsf{seq=y},$\\$\mathsf{ack=x+1}$};

\draw[->] ([yshift=-.3cm]synacke) coordinate (acko) -- ([yshift=-.7cm]acko-|recv) coordinate (acke)

 node[pos=.65, above, sloped] {ACK}
 node[pos=.65, packetinfo] {$\mathsf{seq=x+1},$\\$\mathsf{ack=y+1}$};

\draw[thick, solid, shorten >=-1cm] (init) -- (init|-acke); \draw[thick, solid, shorten >=-1cm] (recv) -- (recv|-acke);

\draw[dotted] (init.255)--([yshift=2mm]init.255|-syn1o); \draw[dotted] (recv.285)--([yshift=2mm]recv.285|-syn1e) coordinate[pos=.5] (aux1); \draw[dotted] ([yshift=1mm]init.255|-synacke) --([yshift=-5mm]init.255|-acke) coordinate (aux2);

\node[below left = 0mm and 2mm of init.south, commentl]{\textbf{CLOSED}}; \node[left = 2mm of syn1o.west, commentl]{\textbf{SYN\_SENT}}; \node[below left = -4.5mm and 2mm of acko.west, commentl]{\textbf{ESTABLISHED}\\[-1.5mm]{\itshape connection}};

\node[below right = 0mm and 2mm of recv.south, commentr]{\textbf{CLOSED}}; \node[right = 2mm of recv|-aux1, commentr]{\textbf{LISTEN}}; \node[right = 2mm of synacko.west, commentr]{\textbf{SYN\_RECEIVED}}; \node[below right = -1mm and 2mm of acke.west, commentr]{\textbf{ESTABLISHED}\\[-1.5mm]{\itshape connection}}; \end{tikzpicture}

\end{document}

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File:TCP connection establishment.svg

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1 February 2026

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322e0372e6cd07bee98e3f22789eec6e6bb66cfb

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