2-23 xmu sum update

data/ch_wireshark/sec_arp.tex

@@ -220,7 +220,7 @@ IP地址长度为4字节。每个字段的含义如下：
 
   \begin{figure}[!ht]
     \centering
-    \includegraphics[width=12cm]{wireshark-statistic}
+    \includegraphics[width=16cm]{wireshark-statistic}
     \caption{统计功能}
     \label{fig:c:wireshark_wireshark-statistic}
   \end{figure}

data/ch_wireshark/sec_ip.tex

@@ -248,7 +248,7 @@ tracert命令（Linux）格式和常用参数如图\ref{fig:tracert-cmd}所示
 
   \begin{figure}[!ht]
     \centering
-    \includegraphics[width=12cm]{wireshark-monitor}
+    \includegraphics[width=16cm]{wireshark-monitor}
     \caption{Wireshark监视器界面}
     \label{fig:c:wireshark_wireshark-monitor}
   \end{figure}
@@ -258,7 +258,7 @@ tracert命令（Linux）格式和常用参数如图\ref{fig:tracert-cmd}所示
 
   \begin{figure}[!ht]
     \centering
-    \includegraphics[width=12cm]{ip-view}
+    \includegraphics[width=16cm]{ip-view}
     \caption{查看IP数据报}
     \label{fig:c:wireshark_ip-view}
   \end{figure}
@@ -268,7 +268,7 @@ tracert命令（Linux）格式和常用参数如图\ref{fig:tracert-cmd}所示
 
   \begin{figure}[!ht]
     \centering
-    \includegraphics[width=12cm]{echo-request}
+    \includegraphics[width=16cm]{echo-request}
     \caption{Echo request示例}
     \label{fig:c:wireshark_echo-request}
   \end{figure}
@@ -302,7 +302,7 @@ tracert命令（Linux）格式和常用参数如图\ref{fig:tracert-cmd}所示
 
   \begin{figure}[!ht]
     \centering
-    \includegraphics[width=12cm]{wireshark-filter-setup}
+    \includegraphics[width=16cm]{wireshark-filter-setup}
     \caption{在Wireshark中设置过滤条件}
     \label{fig:c:wireshark_wireshark-filter-setup}
   \end{figure}

data/ch_wireshark/sec_tcp.tex

@@ -193,7 +193,7 @@ CUBIC\footnote{\href{https://www.researchgate.net/publication/220623913}{CUBIC:
 应运而生。
 CUBIC的关键特征是：cwnd窗口的增长依赖两次丢包的时间。
 2016年，谷歌提出了
-BBR\footnote{\href{https://research.google/pubs/pub45646/}{BBR: Congestion-Based Congestion Control}}
+BBR\footnote{\href{https://queue.acm.org/detail.cfm?id=3022184}{BBR: Congestion-Based Congestion Control}}
 拥塞控制算法，它不再基于丢包感知来调整cwnd，
 而是利用估算的带宽和延迟直接推测拥塞程度进而确定发送窗口。
 
@@ -232,7 +232,7 @@ BBR\footnote{\href{https://research.google/pubs/pub45646/}{BBR: Congestion-Based
     \texttt{nmap} & 网络扫描 & \url{https://nmap.org/man/zh/index.html}\\ \hline
     \texttt{curl} & 文本浏览器 & \url{https://man.linuxde.net/curl}\\ \hline
     \texttt{wget} & 下载Web文件 & \texttt{wget <IP>/<PathAndFileName>}\\ \hline
-    \texttt{tc} & 流量控制 & \href{https://man7.org/linux/man-pages/man8/tc.8.html}{TC命令手册} \\ \hline
+    \texttt{tc} & 流量控制 & \href{https://man7.org/linux/man-pages/man8/tc.8.html}{tc命令手册} \\ \hline
     \texttt{iptables} & 防火墙配置 & \url{https://man.linuxde.net/iptables}\\ \hline
     \texttt{netwox} & 网络工具 & \url{https://sourceforge.net/projects/ntwox/}\\ \hline
     \texttt{ss} & Socket状态 & \texttt{ss –atn}\\ \hline
@@ -366,7 +366,7 @@ BBR\footnote{\href{https://research.google/pubs/pub45646/}{BBR: Congestion-Based
 \begin{enumerate}
   \item 编写一对简单的TCP连接程序，
   也可以直接运行指导书提供的Python程序
-  (源代码见\ref{subsec:c:wireshark:s:tcp_additionalprg}节中的附件)。
+  (源代码见本节最后的\nameref{subsec:c:wireshark:s:tcp_additionalprg})。
   在客户端快速发送数据给服务端，而服务端则有意缓慢地接收数据，
   观察TCP如何用窗口大小值进行流量控制。虚拟机两端分别运行
   \texttt{python3 server.py}和\texttt{python3 client.py}。