How to test network bandwidth? (iperf qperf netcat nc ttcp)

Solution Verified - Updated -

Issue

  • How to test network bandwidth?
  • How to use tools such as iperf qperf netcat nc ttcp to see maximum available networking speed?
  • Need to measure a system's maximum TCP and UDP bandwidth performance throughput. How this can be achieved?
  • Where can I download the iperf utility package?
  • How to test network throughput without special tools such as iperf?
  • What is iperf and can I use it on a RHEL machine?

Environment

  • Red Hat Enterprise Linux
  • Network

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