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\ihead{CCNA v7.2: ITN (Introduction to Networks)}
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\ohead{kohnlehome.de/cisco/CCNA-1-07.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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    7 Ethernet Switching
\end{center}

\section*{7.1 Ethernet Frame}
\begin{itemize}
    \item Data Link Sublayers
          \begin{itemize}
              \item LLC Sublayer: IEEE 802.2: Typ-Feld (IPv4 / IPv6 / ARP)
              \item MAC Sublayer: IEEE 802.3
                    \begin{itemize}
                        \item Ethernet Frame-format
                        \item Ethernet Addressing
                        \item Ethernet Error Detection
                    \end{itemize}
          \end{itemize}
    \item Ethernet Frame
          \begin{itemize}
              \item 8 Byte: Preamble and SFD (Start Frame Deliniter)
              \item 6 Byte: Destination MAC Address
              \item 6 Byte: Source MAC Address
              \item 2 Byte: Type / Lenth
              \item 46-1500 Byte: Data
              \item 4 Byte: FCS (Frame Check Sum): CRC (Cyclic Redundancy Check)

          \end{itemize}\end{itemize}

\section*{7.2 Ethernet MAC Address}
\begin{itemize}
    \item AA-AA-AA-BB-BB-BB
          \begin{itemize}
              \item 6 Byte: OUI (Organizationally Unique Identifier)
              \item 6 Byte: Vendor Asssigned
          \end{itemize}
    \item MAC Addresses
          \begin{itemize}
              \item Unicast
              \item Broadcast: FF-FF-FF-FF-FF-FF
              \item Multicast:
                    \begin{itemize}
                        \item 01-00-5E- … IPv4 Multicast
                        \item 33-33- … IPv6-Multicast
                    \end{itemize}
          \end{itemize}
\end{itemize}

\section*{7.3 The MAC Address Table}
\begin{itemize}
    \item Switch MAC Address Table: CAM (Content Addressable Memory)
    \item Switch speichert QuellMAC
    \item Switch leitet anhand von ZielMAC weiter
    \item 7.3.6: Activity – Switch It!
\end{itemize}

\section*{7.4 Switch Speeds and Forwarding Methods}
\begin{itemize}
    \item Switch Forwarding Methods
          \begin{itemize}
              \item Store-and-forward switching
              \item Cut-through switching
                    \begin{itemize}
                        \item Fast-forward switching: nach 6 Byte
                        \item Fragment-free switching: nach 64 Byte

                    \end{itemize}
          \end{itemize}
    \item Memory Buffering Methods
          \begin{itemize}
              \item  Port-based memory: queues linked to specific incoming and outgoing ports
              \item Shared memory: dynamically allocated (besser!)

          \end{itemize}
    \item Duplex autonegotiation
          \begin{itemize}
              \item Full-duplex
              \item Half-duplex
          \end{itemize}
    \item Speed autonegotiation
    \item Auto-MDIX
          \begin{itemize}
              \item  Crossover
              \item Straight through
          \end{itemize}
\end{itemize}

\end{document}
