How to Properly Test Wi-Fi Speed: Step-by-Step Guide

Main Mistake

"My plan is 200 Mbps, Speedtest 30. ISP scams!"

99% — test was wrong, not ISP.

Understand First

ISP plan = speed to ISP server. 200 Mbps to Tas-IX backbone. EU/US may be 50/0 — not ISP fault.

Wi-Fi ≠ internet. ISP 200 → LAN 1 Gbps → Wi-Fi 6 5m: 400-700 → 2.4 GHz wall: 50-150.

Device-dependent. Old laptop = 100-150 max even on top router.

Proper Method

Test 1: ISP speed (bypass Wi-Fi). Ethernet direct to router → Speedtest 3x average. <80% = call ISP. Test 2: Wi-Fi at points. Wi-Fi 6 device, 1m baseline, then bedroom/kitchen/far/bathroom. <30% baseline = problem. Test 3: Multi-device load. 5 devices Speedtest simultaneously. Sum ≈ plan = good. 2-3× less = router bottleneck.

Tools

Speedtest.net — standard

Nperf.com — EU

Fast.com — Netflix streaming

iperf3 — pure LAN/Wi-Fi for techies

iperf3

Server: `iperf3 -s`

Client: `iperf3 -c 192.168.1.10 -t 30`

Speedtest hits ISP, iperf3 shows pure Wi-Fi ceiling.

Typical Uzbekistan

PlanTas-IXIntl 10095-10050-90 200180-20080-150 500400-500100-300

Real Wi-Fi Speeds

Standard1mWall Wi-Fi 4 2.430-6010-25 Wi-Fi 5 5200-40050-150 Wi-Fi 6 5400-800100-300 Wi-Fi 6E 6600-1200100-200

Slow Causes

Old device chip

Stuck on 2.4 GHz

Crowded evening channel

Antivirus HTTPS

VPN

Defender SmartScreen

Complain to ISP When

✓ Ethernet test <80%

✓ Constant

✓ Reboot done

✓ No CRC errors

✗ Wi-Fi slower than ethernet

✗ Peak slowdown

✗ EU slower (peering)

✗ VPN slower

Bottom Line

90% "slow internet" = old Wi-Fi standard, far testing, old device, 2.4 GHz.

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