TCP Segment Retransmission Viewer lets you view, graph, and record TCP segment retransmissions and connections to quickly see network congestion / problems. TCP segment retransmissions are a sign of network congestion and reduced throughput. A segment is retransmitted from a client if there is no corresponding acknowledgment from the receiving host. Further analysis can be done in Wireshark at the packet level if a problem is suspected. Trends in # connections, % retransmission, segments sent/received can be seen over time graphically with the graph function, which allows panning, zooming, etc. Specific TCP connection details (like TCPView) are available in a groupable grid.