iperf: iperf - tcp bandwidth tester
iperf: 
iperf: Iperf is a tool to measure maximum TCP bandwidth,
iperf: allowing the tuning of various parameters and UDP characteristics.
iperf: Iperf reports bandwidth, delay jitter, datagram loss.
iperf: 
iperf:   iperf -s               	(run the server)
iperf:   iperf -c serverhostname   	(run the client)
iperf:   iperf -h               	(for help screen)
iperf:   iperf -v               	(for version information)
iperf: