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\ihead{CCNA v7.2: ITN (Introduction to Networks)}
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\ohead{kohnlehome.de/cisco/CCNA-1-13.pdf}
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\ifoot{Franz Kohnle}
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\begin{document}

% Überschrift 
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    \LARGE % Schriftgröße
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    13 ICMP
\end{center}

\section*{13.1 ICMP Messages}
\begin{itemize}
    \item ping: Echo Request / Eco Reply
    \item Destination unreachable ICMPv4
          \begin{itemize}
              \item 0 - Net unreachable
              \item 1 - Host unreachable
              \item 2 - Protocol unreachable
              \item 3 - Port unreachable
          \end{itemize}

    \item Destination unreachable ICMPv4
          \begin{itemize}
              \item 0 - No route to destination
              \item 1 - Communication with the destination is administratively prohibited (e.g., firewall)
              \item 2 – Beyond scope of the source address
              \item 3 - Address unreachable
              \item 4 - Port unreachable
          \end{itemize}

    \item Time exceeded
          \begin{itemize}
              \item IPv4: Time to Live (TTL) = 0
              \item IPv6: Hop Limit = 0
              \item verwendet von traceroute
          \end{itemize}

    \item ICMPv6 Messages
          \begin{itemize}
              \item Router solicitation (RS)
              \item Router Advertisement (RA)
              \item Neighbor Solicitation (NS)
              \item Neighbor Advertisement (NA)
              \item Redirect
          \end{itemize}
\end{itemize}

\section*{13.2 Ping and Traceroute Testing}
\begin{itemize}
    \item Ping - Test Connectivity
    \begin{itemize}
        \item Pinging the local loopback (127.0.0.1, ::1)
        \item Pinging the default gateway
        \item Pinging the remote host        
    \end{itemize}

    \item Traceroute - Test the Path
    \begin{itemize}
        \item Round Trip Time (RTT)
        \item IPv4 TTL and IPv6 Hop Limit                
    \end{itemize}
\end{itemize}

\end{document}
