# netperf > Client-side command for `netperf`, the benchmarking application that measures network throughput. Similar to `iperf`. > See also: `netserver`, for the server-side command. > More information: . - Connect to server on a specific IP address via default port (12865): `netperf {{address}}` - Specify [p]ort: `netperf {{address}} -p {{port}}` - Specify the sampling [l]ength in seconds (default is 10): `netperf {{address}} -l {{seconds}}` - Force IPv[4] or IPv[6]: `netperf {{address}} -{{4|6}}`