Guides

Wi-Fi and Ethernet: How to Compare Results

Compare Wi-Fi and Ethernet on the same device with the same test method. Check the actual connection path, wired limits and what the results can show.

A Wi-Fi test measures your device’s Internet connection at that location. Comparing it with Ethernet can remove one wireless segment, but does not measure only the provider’s line. Your device, adapter, router, Internet route and test server still affect the result. Better wired results point toward the changed local path; they do not clear the provider of every possible problem.

Understand the path being measured

M-Lab NDT measures Internet transfer over a single TCP connection. It does not isolate your Wi-Fi or household cable. A connection’s link rate in network settings is different from Internet throughput. Wi-Fi 4, 5 or 6 labels do not guarantee fixed Mbps ranges: device capabilities, position, interference, other traffic and the test server matter.

Make the comparison repeatable

Use the same computer, app or browser, test method and, where selectable, server. Pause your own downloads and backups and avoid simultaneous tests. Keep other settings unchanged and record a baseline before restarting equipment.
Confirm which connection the test actually uses. If several interfaces or mobile fallback are active, check the device’s network information or ask the administrator. Connect Ethernet to an appropriate router LAN port; do not bypass protection by connecting the computer directly to the Internet.
Alternate Wi-Fi and Ethernet runs at the same place, close together in time. Record download, upload, available latency information, time and any disconnections. Compare repeated results rather than only the highest value. Two runs do not guarantee a diagnosis.
Separately compare Wi-Fi at your usual spot and a suitable spot near the router. Record the band and access point. Ethernet into a mesh point may still use wireless links farther along the path, so it differs from a cable into the main router.

Interpret the differences

Ethernet repeatedly works better: investigate the local path that changed, including position, the wireless segment and mesh links. One comparison does not prove that a particular device is faulty.
Both are similarly slow: consider their common path, router, test server and app. Each local connection may also have its own limit. This does not automatically identify a provider fault; compare another client or time separately.
Ethernet is slower: check link rate, LAN and WAN port capabilities, adapter and dock. A 100 Mbps port can restrict throughput below good Wi-Fi. If needed, separately compare a suitable known-good cable using the same computer and port.
Only a game, call or download has trouble: assess the actual app separately. NDT does not establish frame rate, latency to your game server or every disconnection. Run speed tests outside calls and games.

Improve the wireless path

Start with the usage location, obstacles and links between access points. An open router position consistent with the manufacturer’s placement and ventilation instructions may help. Compare before and after at the same spot. Band suitability depends on the environment and client; 5 GHz is not always faster. This comparison does not require disabling protection or resetting all network settings.

Choose a connection and prepare support information

Suitable Ethernet can serve stationary devices; Wi-Fi can serve mobile ones. Choose using repeated app performance at the intended location. You do not need to turn off Wi-Fi throughout the router, and a cable or plan change cannot solve every problem.
For wired mesh links, check model, ports and supported topology. Nest Wifi points, for example, have no Ethernet ports. Repeaters do not have a universal fixed loss of half the speed. Check your actual path and need before buying.
Privately share device, adapter and router models, location, band, access point, cable path and comparison results with support. Speed tests consume data, and M-Lab publishes measurement data including IP addresses.

Let the evidence guide the next step

If both connections are stable and sufficient for your use, a single higher reading is not a reason to replace equipment. Persistent Wi-Fi differences call for checking position and the local path. If trouble also repeats on an appropriate wired connection, take the records to support. Keep protection and managed-network rules in place, change one thing at a time and check normal use again.