Say my home network has a wifi-password and my friends are connected to it (since I gave them my wifi-password). Is it possible for me to read their data transfer? If yes, then it would also be possible for them to spy on the other users in my home network, right?
I was just curious since public networks are very unsecure and private networks are ''the same'' only with a password. And if I know that password, it should be the same (just with familiar persons), am I wrong?