If I had the time (and I probably would because I consider it important), I would just go down the rabbit hole and explain the internet in the simplest terms possible. You press some buttons and other people around the world see the buttons you pushed and they press some buttons and you can see them too. With every new inevitable question, just keep explaining in terms the child is able to understand, and keep going…
2YO kids do not ask that because they are curious to know how the internet works. They could not care less about the internet. They care about their parents' attention.
not just attention, they want to be involved in doing something 'with you'. Be it looking at cars, tickling and laughing, peeling oranges, piling up books just about any random activity. They just love to be involved.