A portable LAN speed test is the fastest way to identify if your network issues are caused by a faulty cable, a misconfigured switch, or a congested router. By keeping a tool like Totusoft or iPerf3 on your utility USB drive, you’ll always be ready to verify your gigabit (or multi-gigabit) performance anywhere.
Run three tests and take the average to account for temporary network spikes. lan speed test portable