We can over this is more detail once we know the specifics of your event but in general-
A hard-wired internet connection should be provided to the trivia host.
If players will be using smart phones to answer the questions, a decent wireless internet connection should be available to them.  They may also use their mobile data network to connect.
If HIP Trivia provided tablets are to be used to answer questions, we will create the wireless network for the tablets to connect to, piggybacking on the hard-wired connection you provide us.
There are quite a few options and alternatives and they are all based on your specific venue information.  We’ve yet to find a place that we are not able to make work for an event.