The Ethernet cables should be of good quality for fast internet connections.On a wireless modem the speed can be reduced, particularly for devices that are further away from the modem. If you're using your computer you should ideally connect using an Ethernet cable.Only have one computer, tablet or mobile connected to the internet when doing a speed test.Close all background apps and any open browsers or tabs.Using a browser can reduce the speed shown when the connection goes above 100Mbps. This is the most accurate way to test the connection if you have VDSL or Fibre.
