There are many factors that contribute to internet reliability, including the location of the router, the age of the device, your internet service provider and the number of devices in your household competing for bandwidth. DartConnect does not requires a lot, but remember, upload speed matters, and this is normally a weak aspect of home service. Using the device you will be scoring on, in the location you will be playing in, you can use speedtest.net or google speed test. Remember, any streaming service, music, web cams, movies etc. consumes lots of bandwidth, creating traffic DartConnect must compete with.
If your router is old or the standard one provided by the cable company, consider investing in a Mesh Network – this technology has resolved many hard to reach dart alleys.