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+tcptrace is a TCP dump file analysis tool written by Shawn Ostermann
+at Ohio University. It is NOT a packet capture program. It reads
+output dump files in the formats of several popular packet capturing
+programs: tcpdump, snoop, etherpeek, and netm
+
+For each connection, it keeps track of elapsed time, bytes/segments
+sent and received, retransmissions, round trip times, window
+advertisements, throughput, etc. Its output format ranges from
+Simple to Long to Very Detailed.
+
+It can also produce three different types of graphs, as follows:
+
+ Time Sequence Graph
+ This is the format that Tim Shepard started using at MIT some
+ years ago. It shows segments sent and ACKs returned as a
+ function of time.
+ Instantaneous Throughput
+ This format shows the instantaneous (averaged over a few
+ segments) throughput of the connection as a function of time.
+ Round Trip Times
+ This format shows the round trip times for the ACKs as a
+ function of time.
+
+The graphs produced are viewable only by Tim Shepard's wonderful xplot.