Description:

The Ethereal network protocol analyzer has changed its name to Wireshark. The name might be new, but the software is the same. Wireshark’s powerful features make it the tool of choice for network troubleshooting, protocol development, and education worldwide. Wireshark was written by networking experts around the world, and is an example of the power of open source.Wireshark is used by network professionals around the world for analysis, troubleshooting, software and protocol development and education. The program has all of the standard features you would expect in a protocol analyzer, and several features not seen in any other product. Its open source license allows talented experts in the networking community to add enhancements. 

More Info:

Wireshark is developed by Gerald Combs. It is compatible with Windows 2K/2003/XP/Vista.