Changing DNS can improve slow name lookup or fix a broken resolver, but it does not raise the Wi-Fi radio's negotiated link rate.
Before you change anything
This is a diagnostic entry point. The source supports the general check, not a confirmed root cause for your device.
What to check first
How do wired and Wi-Fi tests compare at the same time and test location?
Record the exact model, hardware revision, firmware and recent change before adjusting settings. If you cannot answer the question, keep the cause open.
Narrow the likely path
| Observation | Next check |
|---|---|
| Wired path is also slow | Check WAN service, link negotiation and upstream equipment. |
| Only Wi-Fi is slow | Compare near-router radio performance with the problem room and mesh backhaul. |
| Latency rises under load | Measure upload/download load separately before changing QoS or SQM. |
Decision after the first test
Compare a domain lookup with an IP-only test. If throughput is slow after the page begins loading, test the actual wired and wireless path.
Use a documented next step
Verify before escalating
After each change, repeat the exact failed task. If the result is unchanged, restore the previous setting and use the official support link for your exact hardware revision. Don’t assume a menu or capability from a related model.
Official sources
- Cloudflare DNS resolver function and lookup scope (full_text; checked 2026-11-01)
- TP-Link US Wi-Fi bands, SSID, security and channel settings (full_text; checked 2026-11-01)
Check your exact US model, hardware revision, and firmware on the linked support page before changing settings.