# netserver > Server-side command for `netperf`, the benchmarking application that measures network throughput. > See also: `netperf`, for the client-side command. > More information: . - Start a server on the default port (12865) and fork to background: `netserver` - Start server in foreground and do not fork: `netserver -D` - Specify [p]ort: `netserver -p {{port}}` - Force IPv[4] or IPv[6]: `netserver -{{4|6}}`