DNS

DNS (Domain Name System) translates website and service names into the numeric addresses that computers use to find each other.

What it means for you

When DNS is slow or failing, Wi-Fi can look connected but pages will not load. Restarting your router or switching the DNS server in its settings is a common fix, and some smart devices fail to set up when DNS is misconfigured.

Guides on this topic

• Why Does My Wi-Fi Keep Disconnecting?

  Work out whether one device or the whole network is dropping, then follow the matching fixes.

• Kasa and Tapo Setup Failures and Fixes

  Fixing Kasa and Tapo plugs, bulbs and switches that won't connect: 2.4 GHz only, split band names, resets, firmware and Matter pairing.

• TP-Link Deco Setup and Troubleshooting

  Deco light meanings, red light and offline unit fixes, adding a Deco and connecting smart devices.

Related terms

• IP address
• DHCP
• Router
• Wi-Fi

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Definitions are short and general. For model-specific details, check your device maker’s own documentation.