What this page covers
Compare idle and loaded latency with a controlled, authorised test and a wired baseline where possible.
Step-by-step workflow
- Measure idle gateway and Internet latency.
- Repeat while one controlled upload or download runs.
- Compare wired and Wi-Fi results.
- Test documented QoS/SQM changes one at a time and recheck.
Decision table
| Check | What it tells you | Safe next action |
|---|---|---|
| Idle low, loaded high | Queueing at a bottleneck is plausible | Check upload/download shaping |
| Gateway latency rises | Local Wi-Fi or router queue involved | Test wired and local path |
| Only one device spikes | Client or application load | Check device traffic |
Limits and verification
There is no universal good latency threshold. ICMP replies can be deprioritized, so use multiple observations.
Official sources
- CISA — Securing Home Network Devices (home-network safety guidance)
- Microsoft — Essential network settings and tasks (Windows network fields and commands)
Related Router Portal guides
Subnet calculator · Wi-Fi guide
Keep in mind: Firmware, operating-system menus, ISP policies and regional radio rules can change. Confirm the current official source and exact device before applying a setting.
Our networking steps are lab-tested against standard RFC 1918 private networking protocols across Windows 11 (24H2), macOS Sequoia (15.1), iOS 18, and Android 15. We verify physical device labels and firmware release documentation before publishing gateway instructions. Router Portal is strictly read-only and never requests, intercepts, or logs router passwords.