Some additional tools
Although Wireshark is by far the most common network analysis tool on the market, there are also many other network troubleshooting tools that I use a lot. Before getting into the details, I would like to go back some years to one of the funniest network problems I've ever had. The case itself was very simple, but it comes with an important lesson. It had to do with a network in a warehouse of a big hospital. The warehouse workers were equipped with wireless terminals, taking medication as needed and conveying it to the various departments of the hospital. The problem was that all the terminals worked very slowly. They called an integration company to help them with the problem, and these guys came in with every piece of troubleshooting equipment ever made. They came with Wireshark, Sniffer, wireless analyzers, spectrum analyzers, and many other boxes. I went there, and when I saw what they were doing, I told them that they forgot to bring one important thing...