Network Troubleshooting

Start with the symptom, then follow a tight diagnostic path before changing router or ISP settings.

Step 1: What's your issue?

Choose an issue to see the first recommended checks.

速

Slow speed

Compare wired vs WiFi and inspect background traffic.

路

Router

Restart, update firmware and check WAN negotiation.

带

Bandwidth

Find devices using streaming, backups or downloads.

DNS

DNS

Switch resolvers when lookup delays are visible.

Popular fixes

  1. Why speed tests look fast but browsing feels slow
  2. How to pick a cleaner WiFi channel
  3. How to find who is consuming bandwidth