\begin{frame}[fragile]
\frametitle{Central VPN Server}
\begin{enumerate}
\item Control Unit connects to VPN Server
\item Service Laptop connects to VPN Server
\item Establish routing from VPN1 to VPN2 on Server 
\end{enumerate}
\begin{figure}[h]
\centering
\includegraphics[width=7cm]{images/security-vpn-scenario-a.png}
\end{figure}
\end{frame}