Let's say that Alice wants to send a file to Bob. The idea is that if hole punching doesn't work well, then Alice can setup a Wi-Fi hotspot, and Bob would connect to it. After that, Alice and Bob are in the same local network and we don't need hole punching any more.
Let's say that Alice wants to send a file to Bob. The idea is that if hole punching doesn't work well, then Alice can setup a Wi-Fi hotspot, and Bob would connect to it. After that, Alice and Bob are in the same local network and we don't need hole punching any more.