Description:

Tcpstat reports certain network interface statistics much like
vmstat does for system statistics. tcpstat gets its information by
either monitoring a specific interface, or by reading previously
saved tcpdump data from a file.

Some of the statistics tcpstat calculates:
- bandwidth
- number of packets
- packets per second
- average packet size
- standard deviation of packet size
- interface load
- more...

tcpstat is written with performance and efficiency in mind and is capable
of handling large amounts of packets per second. Its compact command line
interface is geared for the network researcher, system administrator and
desktop shell user. tcpstat has been a valuable tool in university research
papers and commercial networks alike.