\begin{frame}
    \frametitle{Server im Rechenzentrum}
    \begin{center}
      \includegraphics[height=5cm]{img/data_center.jpg}
    \end{center}
\end{frame}

\begin{frame}
    \frametitle{Internetknoten (Router)}
    \begin{center}
      \includegraphics[height=5cm]{img/internet_cable_map.png}
    \end{center}
\end{frame}

\begin{frame}
    \frametitle{Internetknoten (DE-CIX in Frankfurt)}
    \begin{center}
      \includegraphics[height=5cm]{img/de_cix.jpg}
      \\{\small \href{https://de.wikipedia.org/wiki/DE-CIX\#/media/File:DE-CIX\_GERMANY\_-\_Switch\_Rack\_\%286218137120\%29.jpg}{Grafik}: \href{https://creativecommons.org/licenses/by-sa/2.0/}{\cc{by-sa} Stefan Funke}}
    \end{center}
\end{frame}