Wireshark
Few tools are as useful to the IT professional as Wireshark, the go-to network packet capture tool. Wireshark will help you capture network packets and display them at a granular level. Once these packets are broken down, you can use them for real-time or offline analysis. This tool lets you put your network traffic under a microscope, and then filter and drill down into it, zooming in on the root cause of problems, assisting with network analysis and ultimately network security. This free Wireshark tutorial will teach you how to capture, interpret, filter and inspect data packets to effectively troubleshoot.
