diff --git a/ex08/kn08.pdf b/ex08/kn08.pdf
index 867b603..bbc9b84 100644
--- a/ex08/kn08.pdf
+++ b/ex08/kn08.pdf
Binary files differ
diff --git a/ex08/kn08.tex b/ex08/kn08.tex
index 3d7a872..853b672 100644
--- a/ex08/kn08.tex
+++ b/ex08/kn08.tex
@@ -98,7 +98,9 @@
         \item $^{17}< 0.5$
         \item $^{18} > 0.5$
     \end{itemize}
-    \includegraphics[width=\textwidth]{a1.jpg}\pagebreak
+    \includegraphics[width=\textwidth]{a1.jpg}\\\begin{corr}
+        Zufallszahlen entsprechen nicht der Konvention auf manchen Folien\\
+    \end{corr}
 \Aufgabe{Code Division Multiple Access(CDMA)}{10+10+10}
 \begin{enumerate}
 	\item Generate Walsh-Tables for $n=8$:\\
@@ -258,7 +260,7 @@
             ]
             \addplot[thick,mark=none,const plot,black, fill=black] coordinates {(0,0) (1,0) (2,0) (3,-4) (4,2) (5,2) (6,2) (7,-2) (8,0) (9,-4) (10,0) (11,0) (12,2) (13,-2) (14,2) (15,2) (16,0)};
         \end{axis}
-    \end{tikzpicture}
+    \end{tikzpicture}\ok
 \end{enumerate}
 \Aufgabe{Token Ring}{10+10}
 \begin{enumerate}
@@ -267,7 +269,7 @@
         &\overset{n=10}{=}& 10bit + 10\cdot 10^{-7}\cdot 4 Mbit\\
         &=& 10bit +4 bit\\
         &=& 14 bit
-    \end{align*}
+    \end{align*}\ok
 	\item Assume only the token has to circulate ($3\cdot 8 bit= 24bit$):\\
     \begin{align*}
         &24 bit &\le& n\cdot \left(1bit+ \frac{20m}{\frac{2}{3}\cdot 3\cdot 10^8 \frac{m}{s}}\cdot 4Mbit/s\right)\\
@@ -275,12 +277,18 @@
         \Leftrightarrow &\frac{24}{1.4} & \leq & n\\
         \overset{n\in\mathds{N}}{\Rightarrow} & 18 &\leq& n
     \end{align*}
-    $\Rightarrow$ We need at least 18 stations to let the whole token circulate.
+    $\Rightarrow$ We need at least 18 stations to let the whole token circulate.\ok
 \end{enumerate}
 \Aufgabe{Ethernet}{5+5+5+5+5+5}
 \begin{enumerate}
 	\item A bridge is a Layer-2 switch. Switching can be done on different layers but always means the connection of different LANs or devices on the respective layer (e.g. connection Applications)
+    \begin{corr}
+        fast das gleiche, Ausnahme 2-Port Bridge ist kein Switch
+    \end{corr}
 	\item A bridged implementation of a network allows for lowering the overall load by only sending the messages in the networks participating in the conversation. Additional buffering can be implemented in the bridge.
+    \begin{corr}
+        Trennung Kollisionsdomänen
+    \end{corr}
 	\item CSMA/CD is not needed if the network is full duplex because there is no collision if only one stations sends on the one line for this direction.
 	\item \texttt{1A:7B:C3:4D:EF:95} is transmitted as \texttt{A1:B7:3C:D4:FE:59}, in binary representation \texttt{1010 0001 1011 0111 0011 1100 1101 0100 1111 1110 0101 1001}
 	\item Minimum are 46bytes, so we need 4bytes padding
diff --git a/ex09/kn09.tex b/ex09/kn09.tex
index b7bc800..87e6f26 100644
--- a/ex09/kn09.tex
+++ b/ex09/kn09.tex
@@ -252,7 +252,6 @@
     $\frac{5\cdot2\cdot(53\cdot8)}{43 Mbit/s}=9.86\cdot 10^{-5}s$\\
     Minimal is half of the time (no waiting but only transmission at each switch):\\
     $\frac{5\cdot(53\cdot8)}{43 Mbit/s}=4.93\cdot 10^{-5}s$
-    %TODO: maybe 43Mbit/s in the whole network?
     \item $20byte+20byte+8byte=48byte$ which is exactly the payload of an ATM cell, so we need one cell.
 \end{enumerate}
 \end{document}