commit 7494797f5b3a167a06c4f80549ab2dcd053d7068
from: Thomas Böhler <witcher@wiredspace.de>
date: Thu Mar 30 08:39:24 2023 UTC

explain Wireshark screenshot at least once

commit - d8ac1fef52df7f108dc065e85cdc0e2476acb972
commit + 7494797f5b3a167a06c4f80549ab2dcd053d7068
blob - dfbc2baccdf0ff3521aaf6dbaeb2c7630c8c3f8f
blob + bc0c23eb5f1d2c909ff82c72316e88abfc886c8a
--- src/chapters/improving_throughput/setup.tex
+++ src/chapters/improving_throughput/setup.tex
@@ -367,6 +367,15 @@ Figure \ref{fig:feature_req_client_wireshark}.
 	\label{fig:feature_req_client_wireshark}
 \end{figure}
 
+Screenshots of Wireshark packets will include at least the description of a
+packet. These descriptions are ordered layers, where the first closable text box
+represents the lowest layer, and the last one represents the highest layer.
+Figure \ref{fig:feature_req_client_wireshark} shows the text box
+\enquote{Bluetooth Low Energy Link Layer} which represents the \ac{ble} Link
+Layer. Here, the addresses of master and slave are listed, as well as the opcode
+and the feature set sent. This feature set gives an overview of what a
+controller is able to do.
+
 No exchange of the \ac{le} \ac{phy} between master and client is done here, so
 by default the 1M \ac{phy} is used. This exchange will be shown in
 \ref{sec:phy}.
@@ -392,10 +401,11 @@ sent from slave to master.
 
 Further, the \ac{att} \ac{mtu} is exchanged, initiated by the client, which lets
 both client and server know what the minimum \ac{att} \ac{mtu} is that they need
-to use. Figure \ref{fig:exchange_mtu_request_wireshark} shows a request. Note
-that even though the request sends a \ac{att} \ac{mtu} of 517 bytes, the server
-responds with 23 bytes, the default size of the \ac{att} \ac{mtu}, and since the
-smallest of the two sizes is used, 23 bytes is the \ac{att} \ac{mtu} used here.
+to use. Figure \ref{fig:exchange_mtu_request_wireshark} shows a request on the
+\ac{att} layer. Note that even though the request sends a \ac{att} \ac{mtu} of
+517 bytes, the server responds with 23 bytes, the default size of the \ac{att}
+\ac{mtu}, and since the smallest of the two sizes is used, 23 bytes is the
+\ac{att} \ac{mtu} used here.
 
 \begin{figure}[htpb]
 	\centerline{\includegraphics[scale=0.8]{exchange_mtu_request_wireshark.png}}
@@ -404,4 +414,3 @@ smallest of the two sizes is used, 23 bytes is the \ac
 		client.}
 	\label{fig:exchange_mtu_request_wireshark}
 \end{figure}
-