When I hear the word network, I think of television networks.
my inquiry question would be related to free to air, national television networks in Australia.
Understanding how they work, why they work, and thing like, ‘who pays for it if it’s ‘free’?’
Wikipedia has a lot of information, but it also has a substantive reference list for children to go through.
There is also the stations themselves who have history pages, such as network 10.