# iperf > Measure network bandwidth between computers. > More information: . - Run on server: `iperf {{[-s|--server]}}` - Run on server using UDP mode and set server port to listen on 5001: `iperf {{[-u|--udp]}} {{[-s|--server]}} {{[-p|--port]}} {{5001}}` - Run on client: `iperf {{[-c|--client]}} {{server_address}}` - Run on client every 2 seconds: `iperf {{[-c|--client]}} {{server_address}} {{[-i|--interval]}} {{2}}` - Run on client with 5 parallel threads: `iperf {{[-c|--client]}} {{server_address}} {{[-P|--parallel]}} {{5}}` - Run on client using UDP mode: `iperf {{[-u|--udp]}} {{[-c|--client]}} {{server_address}} {{[-p|--port]}} {{5001}}`