its-dokumentationen/08_Lehrer_TCP.md

title	author	papersize	classoption	mainfont	sansfont	header-includes
Transport Control Protocol (TCP)	Carl Kittelberger	a4	oneside	Arial	Arial	\usepackage{longtable}

TCP ist ein Layer-4-Protokoll. Es addressiert Anwendungen über Ports.

• reliable -- zuverlässig
• connection oriented -- verbindungsorientiert

Die folgenden Phasen werden in dieser Reihenfolge ausgeführt:

Verbindungsaufbau

% this needs to be integrated with https://github.com/sdiehl/cats

\node[] (server) {server};
\node[left = of server] (client) {client};

\node[below of=server, node distance=5cm] (server_ground) {};
\node[below of=client, node distance=5cm] (client_ground) {};

\draw (client) -- (client_ground);
\draw (server) -- (server_ground);
\draw[->] ([yshift=-1cm]client.south) -- ([yshift=-1cm]server.south) node[above] {syn};
\draw[->] ([yshift=-2cm]server.south) -- ([yshift=-2cm]client.south) node[above] {ack+syn};
\draw[->] ([yshift=-3cm]client.south) -- ([yshift=-3cm]server.south) node[above] {ack};

Datenaustausch

% this needs to be integrated with https://github.com/sdiehl/cats

\node[] (server) {server};
\node[left = of server] (client) {client};

\node[below of=server, node distance=5cm] (server_ground) {};
\node[below of=client, node distance=5cm] (client_ground) {};

\draw (client) -- (client_ground);
\draw (server) -- (server_ground);
\draw[->] ([yshift=-1cm]client.south) -- ([yshift=-1cm]server.south) node[above] {ack: Sequence Number, Datenlänge};
\draw[->] ([yshift=-2cm]server.south) -- ([yshift=-2cm]client.south) node[above] {ack: Acknowledgement Number};
\draw[->] ([yshift=-3cm]client.south) -- ([yshift=-3cm]server.south) node[above] {ack: Sequence Number...};