A network packet analyzer will try to capture network packets and tries to display that packet data as detailed as possible.

You could think of a network packet analyzer as a measuring device used to examine whats going on inside a network cable.

In the past, such tools were either very expensive, proprietary, or both.

Wireshark is perhaps one of the best open source packet analyzers available today.

Additionally, you can read data from GZIP files without decompressing the archive.

You can choose an Ethernet adapter on a desktop computer or a wireless adapter on a MacBook.

You can also capture Bluethooth, USB, VLANS and other types of network traffic.

Thanks to the color-coded system you can easily read the line of information in the order of their severity level.

For example, the red color indicates the presence of malformed packets generated by Demoal-of-Service attack or a dying network card.

Hence, you can view only packets containing a specific protocol or filter the displayed traffic using one of the pre-defined display filter expressions.

The output can be exported to PostScript, CSV, plain text or XML files.

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