![]() You don't have to be a TCP/IP guru to find some valuable hints with the tool. ![]() TCP Analyzer can provide valuable data if you suspect that the network connection is the cause of the problem. The information provided by TCP Analyzer is mostly interesting for network admins. Network protocol analysis is the truth serum of network communications. It crashed several times while I played with it. I think, TCP Analyzer is more a research project than a finished product, even though it carries the version number 1.2. I wonder why the authors didn't integrate this information into the graphical user interface? There, you will find valuable data when it comes to network troubleshooting: out-of-order data packet count, lost packet count, retransmitted packet count, measured roundtrip time etc. It is a bit strange that TCP Analyzer opens a command line interface, where it displays some further statistical data. The big visualization on the right-hand side allows you to magnify portions of the three small plots. The plot in the middle displays the round-trip-time measurements. One graph is for transmissions from endpoint A to B, and the other one from B to A. The two time-sequence plots show TCP's progress in sending data from one endpoint to the other. There are also three graphical visualizations, but they will only display something if you feed the tool with enough data. Possibilities include limited bandwidth of the bottleneck link, congestion, or other packet losses. You will also find a "Flow" command in this menu, which will let TCP Analyzer guess which primary factor was limiting throughput of the flow. The round-trip-time (RTT) will only be calculated when selected from the Analyze menu. Capsa Free is a network analyzer that allows you to monitor network traffic, troubleshoot network issues and analyze packets. ![]() You can gather statistical data, such as the average data rate, total data amount, and retransmitted data. ![]()
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